Package Instance
Lookup for vulnerable packages by Package URL.
GET /api/packages/62965?format=api
{ "url": "http://public2.vulnerablecode.io/api/packages/62965?format=api", "purl": "pkg:pypi/nanopb@0.4.1.dev959", "type": "pypi", "namespace": "", "name": "nanopb", "version": "0.4.1.dev959", "qualifiers": {}, "subpath": "", "is_vulnerable": true, "next_non_vulnerable_version": "0.4.5", "latest_non_vulnerable_version": "0.4.5", "affected_by_vulnerabilities": [ { "url": "http://public2.vulnerablecode.io/api/vulnerabilities/208255?format=api", "vulnerability_id": "VCID-95nd-te5z-cqbe", "summary": "Nanopb is a small code-size Protocol Buffers implementation in ansi C. In Nanopb before versions 0.3.9.8 and 0.4.5, decoding a specifically formed message can cause invalid `free()` or `realloc()` calls if the message type contains an `oneof` field, and the `oneof` directly contains both a pointer field and a non-pointer field. If the message data first contains the non-pointer field and then the pointer field, the data of the non-pointer field is incorrectly treated as if it was a pointer value. Such message data rarely occurs in normal messages, but it is a concern when untrusted data is parsed. This has been fixed in versions 0.3.9.8 and 0.4.5. See referenced GitHub Security Advisory for more information including workarounds.", "references": [ { "reference_url": "https://api.first.org/data/v1/epss?cve=CVE-2021-21401", "reference_id": "", "reference_type": "", "scores": [ { "value": "0.00809", "scoring_system": "epss", "scoring_elements": "0.74651", "published_at": "2026-06-11T12:55:00Z" } ], "url": "https://api.first.org/data/v1/epss?cve=CVE-2021-21401" }, { "reference_url": "https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-21401", "reference_id": "", "reference_type": "", "scores": [], "url": "https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-21401" }, { "reference_url": "https://github.com/nanopb/nanopb", "reference_id": "", "reference_type": "", "scores": [ { "value": "7.1", "scoring_system": "cvssv3.1", "scoring_elements": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:L" }, { "value": "7.1", "scoring_system": "cvssv4", "scoring_elements": "CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:H/VA:L/SC:N/SI:N/SA:N" }, { "value": "HIGH", "scoring_system": "generic_textual", "scoring_elements": "" } ], "url": "https://github.com/nanopb/nanopb" }, { "reference_url": "https://github.com/nanopb/nanopb/blob/c9124132a604047d0ef97a09c0e99cd9bed2c818/CHANGELOG.txt#L1", "reference_id": "", "reference_type": "", "scores": [ { "value": "7.1", "scoring_system": "cvssv3.1", "scoring_elements": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:L" }, { "value": "7.1", "scoring_system": "cvssv4", "scoring_elements": "CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:H/VA:L/SC:N/SI:N/SA:N" }, { "value": "HIGH", "scoring_system": "generic_textual", "scoring_elements": "" } ], "url": "https://github.com/nanopb/nanopb/blob/c9124132a604047d0ef97a09c0e99cd9bed2c818/CHANGELOG.txt#L1" }, { "reference_url": "https://github.com/nanopb/nanopb/commit/4a375a560651a86726e5283be85a9231fd0efe9c", "reference_id": "", "reference_type": "", "scores": [ { "value": "7.1", "scoring_system": "cvssv3.1", "scoring_elements": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:L" }, { "value": "7.1", "scoring_system": "cvssv4", "scoring_elements": "CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:H/VA:L/SC:N/SI:N/SA:N" }, { "value": "HIGH", "scoring_system": "generic_textual", "scoring_elements": "" } ], "url": "https://github.com/nanopb/nanopb/commit/4a375a560651a86726e5283be85a9231fd0efe9c" }, { "reference_url": "https://github.com/nanopb/nanopb/commit/e2f0ccf939d9f82931d085acb6df8e9a182a4261", "reference_id": "", "reference_type": "", "scores": [ { "value": "7.1", "scoring_system": "cvssv3.1", "scoring_elements": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:L" }, { "value": "7.1", "scoring_system": "cvssv4", "scoring_elements": "CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:H/VA:L/SC:N/SI:N/SA:N" }, { "value": "HIGH", "scoring_system": "generic_textual", "scoring_elements": "" } ], "url": "https://github.com/nanopb/nanopb/commit/e2f0ccf939d9f82931d085acb6df8e9a182a4261" }, { "reference_url": "https://github.com/nanopb/nanopb/issues/647", "reference_id": "", "reference_type": "", "scores": [ { "value": "7.1", "scoring_system": "cvssv3.1", "scoring_elements": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:L" }, { "value": "7.1", "scoring_system": "cvssv4", "scoring_elements": "CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:H/VA:L/SC:N/SI:N/SA:N" }, { "value": "HIGH", "scoring_system": "generic_textual", "scoring_elements": "" } ], "url": "https://github.com/nanopb/nanopb/issues/647" }, { "reference_url": "https://github.com/pypa/advisory-database/tree/main/vulns/nanopb/PYSEC-2021-432.yaml", "reference_id": "", "reference_type": "", "scores": [ { "value": "7.1", "scoring_system": "cvssv3.1", "scoring_elements": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:L" }, { "value": "7.1", "scoring_system": "cvssv4", "scoring_elements": "CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:H/VA:L/SC:N/SI:N/SA:N" }, { "value": "HIGH", "scoring_system": "generic_textual", "scoring_elements": "" } ], "url": "https://github.com/pypa/advisory-database/tree/main/vulns/nanopb/PYSEC-2021-432.yaml" }, { "reference_url": "https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=985844", "reference_id": "985844", "reference_type": "", "scores": [], "url": "https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=985844" }, { "reference_url": "https://nvd.nist.gov/vuln/detail/CVE-2021-21401", "reference_id": "CVE-2021-21401", "reference_type": "", "scores": [ { "value": "7.1", "scoring_system": "cvssv3.1", "scoring_elements": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:L" }, { "value": "7.1", "scoring_system": "cvssv4", "scoring_elements": "CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:H/VA:L/SC:N/SI:N/SA:N" }, { "value": "HIGH", "scoring_system": "generic_textual", "scoring_elements": "" } ], "url": "https://nvd.nist.gov/vuln/detail/CVE-2021-21401" }, { "reference_url": "https://github.com/advisories/GHSA-7mv5-5mxh-qg88", "reference_id": "GHSA-7mv5-5mxh-qg88", "reference_type": "", "scores": [ { "value": "HIGH", "scoring_system": "cvssv3.1_qr", "scoring_elements": "" } ], "url": "https://github.com/advisories/GHSA-7mv5-5mxh-qg88" }, { "reference_url": "https://github.com/nanopb/nanopb/security/advisories/GHSA-7mv5-5mxh-qg88", "reference_id": "GHSA-7mv5-5mxh-qg88", "reference_type": "", "scores": [ { "value": "7.1", "scoring_system": "cvssv3.1", "scoring_elements": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:L" }, { "value": "HIGH", "scoring_system": "cvssv3.1_qr", "scoring_elements": "" }, { "value": "7.1", "scoring_system": "cvssv4", "scoring_elements": "CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:H/VA:L/SC:N/SI:N/SA:N" }, { "value": "HIGH", "scoring_system": "generic_textual", "scoring_elements": "" } ], "url": "https://github.com/nanopb/nanopb/security/advisories/GHSA-7mv5-5mxh-qg88" }, { "reference_url": "https://usn.ubuntu.com/6121-1/", "reference_id": "USN-6121-1", "reference_type": "", "scores": [], "url": "https://usn.ubuntu.com/6121-1/" } ], "fixed_packages": [ { "url": "http://public2.vulnerablecode.io/api/packages/33193?format=api", "purl": "pkg:pypi/nanopb@0.4.5", "is_vulnerable": false, "affected_by_vulnerabilities": [], "resource_url": "http://public2.vulnerablecode.io/packages/pkg:pypi/nanopb@0.4.5" } ], "aliases": [ "CVE-2021-21401", "GHSA-7mv5-5mxh-qg88", "PYSEC-2021-432" ], "risk_score": 4.0, "exploitability": "0.5", "weighted_severity": "8.0", "resource_url": "http://public2.vulnerablecode.io/vulnerabilities/VCID-95nd-te5z-cqbe" }, { "url": "http://public2.vulnerablecode.io/api/vulnerabilities/207924?format=api", "vulnerability_id": "VCID-s8hz-wf29-c3bc", "summary": "Nanopb is a small code-size Protocol Buffers implementation. In Nanopb before versions 0.4.4 and 0.3.9.7, decoding specifically formed message can leak memory if dynamic allocation is enabled and an oneof field contains a static submessage that contains a dynamic field, and the message being decoded contains the submessage multiple times. This is rare in normal messages, but it is a concern when untrusted data is parsed. This is fixed in versions 0.3.9.7 and 0.4.4. The following workarounds are available: 1) Set the option `no_unions` for the oneof field. This will generate fields as separate instead of C union, and avoids triggering the problematic code. 2) Set the type of the submessage field inside oneof to `FT_POINTER`. This way the whole submessage will be dynamically allocated and the problematic code is not executed. 3) Use an arena allocator for nanopb, to make sure all memory can be released afterwards.", "references": [ { "reference_url": "https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2020-26243.json", "reference_id": "", "reference_type": "", "scores": [ { "value": "7.5", "scoring_system": "cvssv3", "scoring_elements": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H" } ], "url": "https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2020-26243.json" }, { "reference_url": "https://api.first.org/data/v1/epss?cve=CVE-2020-26243", "reference_id": "", "reference_type": "", "scores": [ { "value": "0.00528", "scoring_system": "epss", "scoring_elements": "0.67574", "published_at": "2026-06-11T12:55:00Z" } ], "url": "https://api.first.org/data/v1/epss?cve=CVE-2020-26243" }, { "reference_url": "https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-26243", "reference_id": "", "reference_type": "", "scores": [], "url": "https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-26243" }, { "reference_url": "https://github.com/nanopb/nanopb/blob/2b48a361786dfb1f63d229840217a93aae064667/CHANGELOG.txt", "reference_id": "", "reference_type": "", "scores": [ { "value": "7.5", "scoring_system": "cvssv3.1", "scoring_elements": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H" }, { "value": "MODERATE", "scoring_system": "generic_textual", "scoring_elements": "" } ], "url": "https://github.com/nanopb/nanopb/blob/2b48a361786dfb1f63d229840217a93aae064667/CHANGELOG.txt" }, { "reference_url": "https://github.com/nanopb/nanopb/commit/4fe23595732b6f1254cfc11a9b8d6da900b55b0c", "reference_id": "", "reference_type": "", "scores": [ { "value": "7.5", "scoring_system": "cvssv3.1", "scoring_elements": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H" }, { "value": "MODERATE", "scoring_system": "generic_textual", "scoring_elements": "" } ], "url": "https://github.com/nanopb/nanopb/commit/4fe23595732b6f1254cfc11a9b8d6da900b55b0c" }, { "reference_url": "https://github.com/nanopb/nanopb/issues/615", "reference_id": "", "reference_type": "", "scores": [ { "value": "7.5", "scoring_system": "cvssv3.1", "scoring_elements": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H" }, { "value": "MODERATE", "scoring_system": "generic_textual", "scoring_elements": "" } ], "url": "https://github.com/nanopb/nanopb/issues/615" }, { "reference_url": "https://github.com/nanopb/nanopb/security/advisories/GHSA-85rr-4rh9-hhwh", "reference_id": "", "reference_type": "", "scores": [ { "value": "7.5", "scoring_system": "cvssv3.1", "scoring_elements": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H" }, { "value": "MODERATE", "scoring_system": "cvssv3.1_qr", "scoring_elements": "" }, { "value": "MODERATE", "scoring_system": "generic_textual", "scoring_elements": "" } ], "url": "https://github.com/nanopb/nanopb/security/advisories/GHSA-85rr-4rh9-hhwh" }, { "reference_url": "https://nvd.nist.gov/vuln/detail/CVE-2020-26243", "reference_id": "", "reference_type": "", "scores": [ { "value": "7.5", "scoring_system": "cvssv3.1", "scoring_elements": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H" }, { "value": "MODERATE", "scoring_system": "generic_textual", "scoring_elements": "" } ], "url": "https://nvd.nist.gov/vuln/detail/CVE-2020-26243" }, { "reference_url": "https://bugzilla.redhat.com/show_bug.cgi?id=1902065", "reference_id": "1902065", "reference_type": "", "scores": [], "url": "https://bugzilla.redhat.com/show_bug.cgi?id=1902065" }, { "reference_url": "https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=975838", "reference_id": "975838", "reference_type": "", "scores": [], "url": "https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=975838" }, { "reference_url": "https://github.com/advisories/GHSA-85rr-4rh9-hhwh", "reference_id": "GHSA-85rr-4rh9-hhwh", "reference_type": "", "scores": [ { "value": "MODERATE", "scoring_system": "cvssv3.1_qr", "scoring_elements": "" } ], "url": "https://github.com/advisories/GHSA-85rr-4rh9-hhwh" }, { "reference_url": "https://usn.ubuntu.com/6121-1/", "reference_id": "USN-6121-1", "reference_type": "", "scores": [], "url": "https://usn.ubuntu.com/6121-1/" } ], "fixed_packages": [ { "url": "http://public2.vulnerablecode.io/api/packages/63022?format=api", "purl": "pkg:pypi/nanopb@0.4.4", "is_vulnerable": true, "affected_by_vulnerabilities": [ { "vulnerability": "VCID-95nd-te5z-cqbe" } ], "resource_url": "http://public2.vulnerablecode.io/packages/pkg:pypi/nanopb@0.4.4" } ], "aliases": [ "CVE-2020-26243", "GHSA-85rr-4rh9-hhwh" ], "risk_score": null, "exploitability": null, "weighted_severity": null, "resource_url": "http://public2.vulnerablecode.io/vulnerabilities/VCID-s8hz-wf29-c3bc" } ], "fixing_vulnerabilities": [], "risk_score": "4.0", "resource_url": "http://public2.vulnerablecode.io/packages/pkg:pypi/nanopb@0.4.1.dev959" }