{"url":"http://public2.vulnerablecode.io/api/packages/772088?format=json","purl":"pkg:maven/com.fasterxml.jackson.core/jackson-core@2.4.2","type":"maven","namespace":"com.fasterxml.jackson.core","name":"jackson-core","version":"2.4.2","qualifiers":{},"subpath":"","is_vulnerable":true,"next_non_vulnerable_version":"2.18.6","latest_non_vulnerable_version":"2.21.1","affected_by_vulnerabilities":[{"url":"http://public2.vulnerablecode.io/api/vulnerabilities/30156?format=json","vulnerability_id":"VCID-395t-bxwj-7fcu","summary":"Jackson-core Vulnerable to Memory Disclosure via Source Snippet in JsonLocation\n### Overview\n\nA flaw in Jackson-core's `JsonLocation._appendSourceDesc` method allows up to 500 bytes of unintended memory content to be included in exception messages. When parsing JSON from a byte array with an offset and length, the exception message incorrectly reads from the beginning of the array instead of the logical payload start. This results in possible **information disclosure** in systems using **pooled or reused buffers**, like Netty or Vert.x.\n\n### Details\n\nThe vulnerability affects the creation of exception messages like:\n\n```\nJsonParseException: Unexpected character ... at [Source: (byte[])...]\n```\n\nWhen `JsonFactory.createParser(byte[] data, int offset, int len)` is used, and an error occurs while parsing, the exception message should include a snippet from the specified logical payload. However, the method `_appendSourceDesc` ignores the `offset`, and always starts reading from index `0`.\n\nIf the buffer contains residual sensitive data from a previous request, such as credentials or document contents, that data may be exposed if the exception is propagated to the client.\n\nThe issue particularly impacts server applications using:\n\n* Pooled byte buffers (e.g., Netty)\n* Frameworks that surface parse errors in HTTP responses\n* Default Jackson settings (i.e., `INCLUDE_SOURCE_IN_LOCATION` is enabled)\n\nA documented real-world example is [CVE-2021-22145](https://nvd.nist.gov/vuln/detail/CVE-2021-22145) in Elasticsearch, which stemmed from the same root cause.\n\n### Attack Scenario\n\nAn attacker sends malformed JSON to a service using Jackson and pooled byte buffers (e.g., Netty-based HTTP servers). If the server reuses a buffer and includes the parser’s exception in its HTTP 400 response, the attacker may receive residual data from previous requests.\n\n### Proof of Concept\n\n```java\nbyte[] buffer = new byte[1000];\nSystem.arraycopy(\"SECRET\".getBytes(), 0, buffer, 0, 6);\nSystem.arraycopy(\"{ \\\"bad\\\": }\".getBytes(), 0, buffer, 700, 10);\n\nJsonFactory factory = new JsonFactory();\nJsonParser parser = factory.createParser(buffer, 700, 20);\nparser.nextToken(); // throws exception\n\n// Exception message will include \"SECRET\"\n```\n\n### Patches\nThis issue was silently fixed in jackson-core version 2.13.0, released on September 30, 2021, via [PR #652](https://github.com/FasterXML/jackson-core/pull/652).\n\nAll users should upgrade to version 2.13.0 or later.\n\n### Workarounds\nIf upgrading is not immediately possible, applications can mitigate the issue by:\n\n1. **Disabling exception message exposure to clients** — avoid returning parsing exception messages in HTTP responses.\n2. **Disabling source inclusion in exceptions** by setting:\n\n   ```java\n   jsonFactory.disable(JsonFactory.Feature.INCLUDE_SOURCE_IN_LOCATION);\n   ```\n\n    This prevents Jackson from embedding any source content in exception messages, avoiding leakage.\n\n\n### References\n* [Pull Request #652 (Fix implementation)](https://github.com/FasterXML/jackson-core/pull/652)\n* [CVE-2021-22145 (Elasticsearch exposure of this flaw)](https://nvd.nist.gov/vuln/detail/CVE-2021-22145)","references":[{"reference_url":"https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2025-49128.json","reference_id":"","reference_type":"","scores":[{"value":"4.0","scoring_system":"cvssv3","scoring_elements":"CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N"}],"url":"https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2025-49128.json"},{"reference_url":"https://api.first.org/data/v1/epss?cve=CVE-2025-49128","reference_id":"","reference_type":"","scores":[{"value":"0.00027","scoring_system":"epss","scoring_elements":"0.07498","published_at":"2026-05-05T12:55:00Z"},{"value":"0.00027","scoring_system":"epss","scoring_elements":"0.07504","published_at":"2026-04-29T12:55:00Z"},{"value":"0.00027","scoring_system":"epss","scoring_elements":"0.07534","published_at":"2026-04-26T12:55:00Z"},{"value":"0.00027","scoring_system":"epss","scoring_elements":"0.07544","published_at":"2026-04-24T12:55:00Z"},{"value":"0.00027","scoring_system":"epss","scoring_elements":"0.07582","published_at":"2026-04-21T12:55:00Z"},{"value":"0.00027","scoring_system":"epss","scoring_elements":"0.0745","published_at":"2026-04-18T12:55:00Z"},{"value":"0.00027","scoring_system":"epss","scoring_elements":"0.07461","published_at":"2026-04-16T12:55:00Z"},{"value":"0.00027","scoring_system":"epss","scoring_elements":"0.07536","published_at":"2026-04-13T12:55:00Z"},{"value":"0.00027","scoring_system":"epss","scoring_elements":"0.07549","published_at":"2026-04-12T12:55:00Z"},{"value":"0.00027","scoring_system":"epss","scoring_elements":"0.07563","published_at":"2026-04-11T12:55:00Z"},{"value":"0.00027","scoring_system":"epss","scoring_elements":"0.07501","published_at":"2026-04-04T12:55:00Z"},{"value":"0.00027","scoring_system":"epss","scoring_elements":"0.0754","published_at":"2026-04-08T12:55:00Z"},{"value":"0.00027","scoring_system":"epss","scoring_elements":"0.07482","published_at":"2026-04-07T12:55:00Z"},{"value":"0.00027","scoring_system":"epss","scoring_elements":"0.07462","published_at":"2026-04-02T12:55:00Z"}],"url":"https://api.first.org/data/v1/epss?cve=CVE-2025-49128"},{"reference_url":"https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2025-49128","reference_id":"","reference_type":"","scores":[],"url":"https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2025-49128"},{"reference_url":"https://github.com/FasterXML/jackson-core","reference_id":"","reference_type":"","scores":[{"value":"4.0","scoring_system":"cvssv3.1","scoring_elements":"CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N"},{"value":"MODERATE","scoring_system":"generic_textual","scoring_elements":""}],"url":"https://github.com/FasterXML/jackson-core"},{"reference_url":"https://github.com/FasterXML/jackson-core/commit/a6c297682737dde13337cb7c3020f299518609a8","reference_id":"","reference_type":"","scores":[{"value":"4","scoring_system":"cvssv3.1","scoring_elements":"CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N"},{"value":"4.0","scoring_system":"cvssv3.1","scoring_elements":"CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N"},{"value":"MODERATE","scoring_system":"generic_textual","scoring_elements":""},{"value":"Track","scoring_system":"ssvc","scoring_elements":"SSVCv2/E:P/A:N/T:P/P:M/B:A/M:M/D:T/2025-06-09T15:13:56Z/"}],"url":"https://github.com/FasterXML/jackson-core/commit/a6c297682737dde13337cb7c3020f299518609a8"},{"reference_url":"https://github.com/FasterXML/jackson-core/pull/652","reference_id":"","reference_type":"","scores":[{"value":"4","scoring_system":"cvssv3.1","scoring_elements":"CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N"},{"value":"4.0","scoring_system":"cvssv3.1","scoring_elements":"CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N"},{"value":"MODERATE","scoring_system":"generic_textual","scoring_elements":""},{"value":"Track","scoring_system":"ssvc","scoring_elements":"SSVCv2/E:P/A:N/T:P/P:M/B:A/M:M/D:T/2025-06-09T15:13:56Z/"}],"url":"https://github.com/FasterXML/jackson-core/pull/652"},{"reference_url":"https://github.com/FasterXML/jackson-core/security/advisories/GHSA-wf8f-6423-gfxg","reference_id":"","reference_type":"","scores":[{"value":"4","scoring_system":"cvssv3.1","scoring_elements":"CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N"},{"value":"4.0","scoring_system":"cvssv3.1","scoring_elements":"CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N"},{"value":"MODERATE","scoring_system":"cvssv3.1_qr","scoring_elements":""},{"value":"MODERATE","scoring_system":"generic_textual","scoring_elements":""},{"value":"Track","scoring_system":"ssvc","scoring_elements":"SSVCv2/E:P/A:N/T:P/P:M/B:A/M:M/D:T/2025-06-09T15:13:56Z/"}],"url":"https://github.com/FasterXML/jackson-core/security/advisories/GHSA-wf8f-6423-gfxg"},{"reference_url":"https://nvd.nist.gov/vuln/detail/CVE-2021-22145","reference_id":"","reference_type":"","scores":[{"value":"4.0","scoring_system":"cvssv3.1","scoring_elements":"CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N"},{"value":"MODERATE","scoring_system":"generic_textual","scoring_elements":""}],"url":"https://nvd.nist.gov/vuln/detail/CVE-2021-22145"},{"reference_url":"https://nvd.nist.gov/vuln/detail/CVE-2025-49128","reference_id":"","reference_type":"","scores":[{"value":"4.0","scoring_system":"cvssv3.1","scoring_elements":"CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N"},{"value":"MODERATE","scoring_system":"generic_textual","scoring_elements":""}],"url":"https://nvd.nist.gov/vuln/detail/CVE-2025-49128"},{"reference_url":"https://bugzilla.redhat.com/show_bug.cgi?id=2370891","reference_id":"2370891","reference_type":"","scores":[],"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2370891"},{"reference_url":"https://github.com/advisories/GHSA-wf8f-6423-gfxg","reference_id":"GHSA-wf8f-6423-gfxg","reference_type":"","scores":[{"value":"MODERATE","scoring_system":"cvssv3.1_qr","scoring_elements":""}],"url":"https://github.com/advisories/GHSA-wf8f-6423-gfxg"}],"fixed_packages":[{"url":"http://public2.vulnerablecode.io/api/packages/70935?format=json","purl":"pkg:maven/com.fasterxml.jackson.core/jackson-core@2.13.0","is_vulnerable":true,"affected_by_vulnerabilities":[{"vulnerability":"VCID-evmb-e63r-rfcy"},{"vulnerability":"VCID-pwnn-qx48-ykae"}],"resource_url":"http://public2.vulnerablecode.io/packages/pkg:maven/com.fasterxml.jackson.core/jackson-core@2.13.0"}],"aliases":["CVE-2025-49128","GHSA-wf8f-6423-gfxg"],"risk_score":3.1,"exploitability":"0.5","weighted_severity":"6.2","resource_url":"http://public2.vulnerablecode.io/vulnerabilities/VCID-395t-bxwj-7fcu"},{"url":"http://public2.vulnerablecode.io/api/vulnerabilities/21938?format=json","vulnerability_id":"VCID-evmb-e63r-rfcy","summary":"jackson-core: Number Length Constraint Bypass in Async Parser Leads to Potential DoS Condition\n### Summary\nThe non-blocking (async) JSON parser in `jackson-core` bypasses the `maxNumberLength` constraint (default: 1000 characters) defined in `StreamReadConstraints`. This allows an attacker to send JSON with arbitrarily long numbers through the async parser API, leading to excessive memory allocation and potential CPU exhaustion, resulting in a Denial of Service (DoS).\n\nThe standard synchronous parser correctly enforces this limit, but the async parser fails to do so, creating an inconsistent enforcement policy.\n\n### Details\nThe root cause is that the async parsing path in `NonBlockingUtf8JsonParserBase` (and related classes) does not call the methods responsible for number length validation.\n\n- The number parsing methods (e.g., `_finishNumberIntegralPart`) accumulate digits into the `TextBuffer` without any length checks.\n- After parsing, they call `_valueComplete()`, which finalizes the token but does **not** call `resetInt()` or `resetFloat()`.\n- The `resetInt()`/`resetFloat()` methods in `ParserBase` are where the `validateIntegerLength()` and `validateFPLength()` checks are performed.\n- Because this validation step is skipped, the `maxNumberLength` constraint is never enforced in the async code path.\n\n### PoC\nThe following JUnit 5 test demonstrates the vulnerability. It shows that the async parser accepts a 5,000-digit number, whereas the limit should be 1,000.\n\n```java\npackage tools.jackson.core.unittest.dos;\n\nimport java.nio.charset.StandardCharsets;\n\nimport org.junit.jupiter.api.Test;\n\nimport tools.jackson.core.*;\nimport tools.jackson.core.exc.StreamConstraintsException;\nimport tools.jackson.core.json.JsonFactory;\nimport tools.jackson.core.json.async.NonBlockingByteArrayJsonParser;\n\nimport static org.junit.jupiter.api.Assertions.*;\n\n/**\n * POC: Number Length Constraint Bypass in Non-Blocking (Async) JSON Parsers\n *\n * Authors: sprabhav7, rohan-repos\n * \n * maxNumberLength default = 1000 characters (digits).\n * A number with more than 1000 digits should be rejected by any parser.\n *\n * BUG: The async parser never calls resetInt()/resetFloat() which is where\n * validateIntegerLength()/validateFPLength() lives. Instead it calls\n * _valueComplete() which skips all number length validation.\n *\n * CWE-770: Allocation of Resources Without Limits or Throttling\n */\nclass AsyncParserNumberLengthBypassTest {\n\n    private static final int MAX_NUMBER_LENGTH = 1000;\n    private static final int TEST_NUMBER_LENGTH = 5000;\n\n    private final JsonFactory factory = new JsonFactory();\n\n    // CONTROL: Sync parser correctly rejects a number exceeding maxNumberLength\n    @Test\n    void syncParserRejectsLongNumber() throws Exception {\n        byte[] payload = buildPayloadWithLongInteger(TEST_NUMBER_LENGTH);\n\t\t\n\t\t// Output to console\n        System.out.println(\"[SYNC] Parsing \" + TEST_NUMBER_LENGTH + \"-digit number (limit: \" + MAX_NUMBER_LENGTH + \")\");\n        try {\n            try (JsonParser p = factory.createParser(ObjectReadContext.empty(), payload)) {\n                while (p.nextToken() != null) {\n                    if (p.currentToken() == JsonToken.VALUE_NUMBER_INT) {\n                        System.out.println(\"[SYNC] Accepted number with \" + p.getText().length() + \" digits — UNEXPECTED\");\n                    }\n                }\n            }\n            fail(\"Sync parser must reject a \" + TEST_NUMBER_LENGTH + \"-digit number\");\n        } catch (StreamConstraintsException e) {\n            System.out.println(\"[SYNC] Rejected with StreamConstraintsException: \" + e.getMessage());\n        }\n    }\n\n    // VULNERABILITY: Async parser accepts the SAME number that sync rejects\n    @Test\n    void asyncParserAcceptsLongNumber() throws Exception {\n        byte[] payload = buildPayloadWithLongInteger(TEST_NUMBER_LENGTH);\n\n        NonBlockingByteArrayJsonParser p =\n            (NonBlockingByteArrayJsonParser) factory.createNonBlockingByteArrayParser(ObjectReadContext.empty());\n        p.feedInput(payload, 0, payload.length);\n        p.endOfInput();\n\n        boolean foundNumber = false;\n        try {\n            while (p.nextToken() != null) {\n                if (p.currentToken() == JsonToken.VALUE_NUMBER_INT) {\n                    foundNumber = true;\n                    String numberText = p.getText();\n                    assertEquals(TEST_NUMBER_LENGTH, numberText.length(),\n                        \"Async parser silently accepted all \" + TEST_NUMBER_LENGTH + \" digits\");\n                }\n            }\n            // Output to console\n            System.out.println(\"[ASYNC INT] Accepted number with \" + TEST_NUMBER_LENGTH + \" digits — BUG CONFIRMED\");\n            assertTrue(foundNumber, \"Parser should have produced a VALUE_NUMBER_INT token\");\n        } catch (StreamConstraintsException e) {\n            fail(\"Bug is fixed — async parser now correctly rejects long numbers: \" + e.getMessage());\n        }\n        p.close();\n    }\n\n    private byte[] buildPayloadWithLongInteger(int numDigits) {\n        StringBuilder sb = new StringBuilder(numDigits + 10);\n        sb.append(\"{\\\"v\\\":\");\n        for (int i = 0; i < numDigits; i++) {\n            sb.append((char) ('1' + (i % 9)));\n        }\n        sb.append('}');\n        return sb.toString().getBytes(StandardCharsets.UTF_8);\n    }\n}\n\n```\n\n\n### Impact\nA malicious actor can send a JSON document with an arbitrarily long number to an application using the async parser (e.g., in a Spring WebFlux or other reactive application). This can cause:\n1.  **Memory Exhaustion:** Unbounded allocation of memory in the `TextBuffer` to store the number's digits, leading to an `OutOfMemoryError`.\n2.  **CPU Exhaustion:** If the application subsequently calls `getBigIntegerValue()` or `getDecimalValue()`, the JVM can be tied up in O(n^2) `BigInteger` parsing operations, leading to a CPU-based DoS.\n\n### Suggested Remediation\n\nThe async parsing path should be updated to respect the `maxNumberLength` constraint. The simplest fix appears to ensure that `_valueComplete()` or a similar method in the async path calls the appropriate validation methods (`resetInt()` or `resetFloat()`) already present in `ParserBase`, mirroring the behavior of the synchronous parsers.\n\n**NOTE:** This research was performed in collaboration with [rohan-repos](https://github.com/rohan-repos)","references":[{"reference_url":"https://github.com/FasterXML/jackson-core","reference_id":"","reference_type":"","scores":[{"value":"6.9","scoring_system":"cvssv4","scoring_elements":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N"},{"value":"MODERATE","scoring_system":"generic_textual","scoring_elements":""}],"url":"https://github.com/FasterXML/jackson-core"},{"reference_url":"https://github.com/FasterXML/jackson-core/commit/b0c428e6f993e1b5ece5c1c3cb2523e887cd52cf","reference_id":"","reference_type":"","scores":[{"value":"6.9","scoring_system":"cvssv4","scoring_elements":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N"},{"value":"MODERATE","scoring_system":"generic_textual","scoring_elements":""}],"url":"https://github.com/FasterXML/jackson-core/commit/b0c428e6f993e1b5ece5c1c3cb2523e887cd52cf"},{"reference_url":"https://github.com/FasterXML/jackson-core/pull/1555","reference_id":"","reference_type":"","scores":[{"value":"6.9","scoring_system":"cvssv4","scoring_elements":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N"},{"value":"MODERATE","scoring_system":"generic_textual","scoring_elements":""}],"url":"https://github.com/FasterXML/jackson-core/pull/1555"},{"reference_url":"https://github.com/FasterXML/jackson-core/security/advisories/GHSA-72hv-8253-57qq","reference_id":"","reference_type":"","scores":[{"value":"MODERATE","scoring_system":"cvssv3.1_qr","scoring_elements":""},{"value":"6.9","scoring_system":"cvssv4","scoring_elements":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N"},{"value":"MODERATE","scoring_system":"generic_textual","scoring_elements":""}],"url":"https://github.com/FasterXML/jackson-core/security/advisories/GHSA-72hv-8253-57qq"},{"reference_url":"https://github.com/advisories/GHSA-72hv-8253-57qq","reference_id":"GHSA-72hv-8253-57qq","reference_type":"","scores":[{"value":"MODERATE","scoring_system":"cvssv3.1_qr","scoring_elements":""}],"url":"https://github.com/advisories/GHSA-72hv-8253-57qq"}],"fixed_packages":[{"url":"http://public2.vulnerablecode.io/api/packages/64511?format=json","purl":"pkg:maven/com.fasterxml.jackson.core/jackson-core@2.18.6","is_vulnerable":false,"affected_by_vulnerabilities":[],"resource_url":"http://public2.vulnerablecode.io/packages/pkg:maven/com.fasterxml.jackson.core/jackson-core@2.18.6"},{"url":"http://public2.vulnerablecode.io/api/packages/64512?format=json","purl":"pkg:maven/com.fasterxml.jackson.core/jackson-core@2.21.1","is_vulnerable":false,"affected_by_vulnerabilities":[],"resource_url":"http://public2.vulnerablecode.io/packages/pkg:maven/com.fasterxml.jackson.core/jackson-core@2.21.1"},{"url":"http://public2.vulnerablecode.io/api/packages/64515?format=json","purl":"pkg:maven/com.fasterxml.jackson.core/jackson-core@3.1.0","is_vulnerable":false,"affected_by_vulnerabilities":[],"resource_url":"http://public2.vulnerablecode.io/packages/pkg:maven/com.fasterxml.jackson.core/jackson-core@3.1.0"}],"aliases":["GHSA-72hv-8253-57qq"],"risk_score":3.1,"exploitability":"0.5","weighted_severity":"6.2","resource_url":"http://public2.vulnerablecode.io/vulnerabilities/VCID-evmb-e63r-rfcy"},{"url":"http://public2.vulnerablecode.io/api/vulnerabilities/30128?format=json","vulnerability_id":"VCID-pwnn-qx48-ykae","summary":"jackson-core can throw a StackoverflowError when processing deeply nested data\n### Impact\nWith older versions  of jackson-core, if you parse an input file and it has deeply nested data, Jackson could end up throwing a StackoverflowError if the depth is particularly large.\n\n### Patches\njackson-core 2.15.0 contains a configurable limit for how deep Jackson will traverse in an input document, defaulting to an allowable depth of 1000. Change is in https://github.com/FasterXML/jackson-core/pull/943. jackson-core will throw a StreamConstraintsException if the limit is reached.\njackson-databind also benefits from this change because it uses jackson-core to parse JSON inputs.\n\n### Workarounds\nUsers should avoid parsing input files from untrusted 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