Vulnerability Instance
Lookup for vulnerabilities affecting packages.
GET /api/vulnerabilities/50751?format=api
{ "url": "http://public2.vulnerablecode.io/api/vulnerabilities/50751?format=api", "vulnerability_id": "VCID-jy5e-8syt-bueu", "summary": "Apache ZooKeeper: Reverse-DNS fallback enables hostname verification bypass in ZooKeeper ZKTrustManager\nHostname verification in Apache ZooKeeper ZKTrustManager falls back to reverse DNS (PTR) when IP SAN validation fails, allowing attackers who control or spoof PTR records to impersonate ZooKeeper servers or clients with a valid certificate for the PTR name. It's important to note that attacker must present a certificate which is trusted by ZKTrustManager which makes the attack vector harder to exploit. Users are recommended to upgrade to version 3.8.6 or 3.9.5, which fixes this issue by introducing a new configuration option to disable reverse DNS lookup in client and quorum protocols.", "aliases": [ { "alias": "CVE-2026-24281" }, { "alias": "GHSA-7xrh-hqfc-g7qr" } ], "fixed_packages": [ { "url": "http://public2.vulnerablecode.io/api/packages/510071?format=api", "purl": "pkg:deb/debian/zookeeper@3.9.5-1", "is_vulnerable": false, "affected_by_vulnerabilities": [], "resource_url": "http://public2.vulnerablecode.io/packages/pkg:deb/debian/zookeeper@3.9.5-1" }, { "url": "http://public2.vulnerablecode.io/api/packages/137320?format=api", "purl": "pkg:deb/debian/zookeeper@3.9.5-1?distro=trixie", "is_vulnerable": false, "affected_by_vulnerabilities": [], "resource_url": "http://public2.vulnerablecode.io/packages/pkg:deb/debian/zookeeper@3.9.5-1%3Fdistro=trixie" }, { "url": "http://public2.vulnerablecode.io/api/packages/74542?format=api", "purl": "pkg:maven/org.apache.zookeeper/zookeeper@3.8.6", "is_vulnerable": false, "affected_by_vulnerabilities": [], "resource_url": "http://public2.vulnerablecode.io/packages/pkg:maven/org.apache.zookeeper/zookeeper@3.8.6" }, { "url": "http://public2.vulnerablecode.io/api/packages/74543?format=api", "purl": "pkg:maven/org.apache.zookeeper/zookeeper@3.9.5", "is_vulnerable": false, "affected_by_vulnerabilities": [], "resource_url": "http://public2.vulnerablecode.io/packages/pkg:maven/org.apache.zookeeper/zookeeper@3.9.5" } ], "affected_packages": [ { "url": "http://public2.vulnerablecode.io/api/packages/137318?format=api", "purl": "pkg:deb/debian/zookeeper@3.4.13-6%2Bdeb11u1?distro=trixie", "is_vulnerable": true, "affected_by_vulnerabilities": [ { "vulnerability": "VCID-5pdc-3tk8-8bag" }, { "vulnerability": "VCID-9kth-n6wc-a7d2" }, { "vulnerability": "VCID-jy5e-8syt-bueu" } ], "resource_url": "http://public2.vulnerablecode.io/packages/pkg:deb/debian/zookeeper@3.4.13-6%252Bdeb11u1%3Fdistro=trixie" }, { "url": "http://public2.vulnerablecode.io/api/packages/196050?format=api", "purl": "pkg:deb/debian/zookeeper@3.4.13-6%2Bdeb11u1", "is_vulnerable": true, "affected_by_vulnerabilities": [ { "vulnerability": "VCID-5pdc-3tk8-8bag" }, { "vulnerability": "VCID-9kth-n6wc-a7d2" }, { "vulnerability": "VCID-jy5e-8syt-bueu" } ], "resource_url": "http://public2.vulnerablecode.io/packages/pkg:deb/debian/zookeeper@3.4.13-6%252Bdeb11u1" }, { "url": "http://public2.vulnerablecode.io/api/packages/137316?format=api", "purl": "pkg:deb/debian/zookeeper@3.8.0-11%2Bdeb12u2?distro=trixie", "is_vulnerable": true, "affected_by_vulnerabilities": [ { "vulnerability": "VCID-9kth-n6wc-a7d2" }, { "vulnerability": "VCID-jy5e-8syt-bueu" } ], "resource_url": "http://public2.vulnerablecode.io/packages/pkg:deb/debian/zookeeper@3.8.0-11%252Bdeb12u2%3Fdistro=trixie" }, { "url": "http://public2.vulnerablecode.io/api/packages/196051?format=api", "purl": "pkg:deb/debian/zookeeper@3.8.0-11%2Bdeb12u2", "is_vulnerable": true, "affected_by_vulnerabilities": [ { "vulnerability": "VCID-9kth-n6wc-a7d2" }, { "vulnerability": "VCID-jy5e-8syt-bueu" } ], "resource_url": "http://public2.vulnerablecode.io/packages/pkg:deb/debian/zookeeper@3.8.0-11%252Bdeb12u2" }, { "url": "http://public2.vulnerablecode.io/api/packages/137321?format=api", "purl": "pkg:deb/debian/zookeeper@3.9.3-1%2Bdeb13u1?distro=trixie", "is_vulnerable": true, "affected_by_vulnerabilities": [ { "vulnerability": "VCID-9kth-n6wc-a7d2" }, { "vulnerability": "VCID-jy5e-8syt-bueu" }, { "vulnerability": "VCID-v1sz-wxb7-tkfh" } ], "resource_url": "http://public2.vulnerablecode.io/packages/pkg:deb/debian/zookeeper@3.9.3-1%252Bdeb13u1%3Fdistro=trixie" }, { "url": "http://public2.vulnerablecode.io/api/packages/510070?format=api", "purl": "pkg:deb/debian/zookeeper@3.9.3-1%2Bdeb13u1", "is_vulnerable": true, "affected_by_vulnerabilities": [ { "vulnerability": "VCID-9kth-n6wc-a7d2" }, { "vulnerability": "VCID-jy5e-8syt-bueu" }, { "vulnerability": "VCID-v1sz-wxb7-tkfh" } ], "resource_url": "http://public2.vulnerablecode.io/packages/pkg:deb/debian/zookeeper@3.9.3-1%252Bdeb13u1" }, { "url": "http://public2.vulnerablecode.io/api/packages/67305?format=api", "purl": "pkg:maven/org.apache.zookeeper/zookeeper@3.8.0", "is_vulnerable": true, "affected_by_vulnerabilities": [ { "vulnerability": "VCID-5pdc-3tk8-8bag" }, { "vulnerability": "VCID-9kth-n6wc-a7d2" }, { "vulnerability": "VCID-amrj-mbhn-97ez" }, { "vulnerability": "VCID-jy5e-8syt-bueu" } ], "resource_url": "http://public2.vulnerablecode.io/packages/pkg:maven/org.apache.zookeeper/zookeeper@3.8.0" }, { "url": "http://public2.vulnerablecode.io/api/packages/680834?format=api", "purl": "pkg:maven/org.apache.zookeeper/zookeeper@3.8.1", "is_vulnerable": true, "affected_by_vulnerabilities": [ { "vulnerability": "VCID-amrj-mbhn-97ez" }, { "vulnerability": "VCID-jy5e-8syt-bueu" } ], "resource_url": "http://public2.vulnerablecode.io/packages/pkg:maven/org.apache.zookeeper/zookeeper@3.8.1" }, { "url": "http://public2.vulnerablecode.io/api/packages/680835?format=api", "purl": "pkg:maven/org.apache.zookeeper/zookeeper@3.8.2", "is_vulnerable": true, "affected_by_vulnerabilities": [ { "vulnerability": "VCID-amrj-mbhn-97ez" }, { "vulnerability": "VCID-jy5e-8syt-bueu" } ], "resource_url": "http://public2.vulnerablecode.io/packages/pkg:maven/org.apache.zookeeper/zookeeper@3.8.2" }, { "url": "http://public2.vulnerablecode.io/api/packages/67308?format=api", "purl": "pkg:maven/org.apache.zookeeper/zookeeper@3.8.3", "is_vulnerable": true, "affected_by_vulnerabilities": [ { "vulnerability": "VCID-5pdc-3tk8-8bag" }, { "vulnerability": "VCID-jy5e-8syt-bueu" } ], "resource_url": "http://public2.vulnerablecode.io/packages/pkg:maven/org.apache.zookeeper/zookeeper@3.8.3" }, { "url": "http://public2.vulnerablecode.io/api/packages/69420?format=api", "purl": "pkg:maven/org.apache.zookeeper/zookeeper@3.8.4", "is_vulnerable": true, "affected_by_vulnerabilities": [ { "vulnerability": "VCID-jy5e-8syt-bueu" } ], "resource_url": "http://public2.vulnerablecode.io/packages/pkg:maven/org.apache.zookeeper/zookeeper@3.8.4" }, { "url": "http://public2.vulnerablecode.io/api/packages/978460?format=api", "purl": "pkg:maven/org.apache.zookeeper/zookeeper@3.8.5", "is_vulnerable": true, "affected_by_vulnerabilities": [ { "vulnerability": "VCID-jy5e-8syt-bueu" } ], "resource_url": "http://public2.vulnerablecode.io/packages/pkg:maven/org.apache.zookeeper/zookeeper@3.8.5" }, { "url": "http://public2.vulnerablecode.io/api/packages/67306?format=api", "purl": "pkg:maven/org.apache.zookeeper/zookeeper@3.9.0", "is_vulnerable": true, "affected_by_vulnerabilities": [ { "vulnerability": "VCID-5pdc-3tk8-8bag" }, { "vulnerability": "VCID-9kth-n6wc-a7d2" }, { "vulnerability": "VCID-amrj-mbhn-97ez" }, { "vulnerability": "VCID-jy5e-8syt-bueu" }, { "vulnerability": "VCID-k5d7-jzkg-4yda" }, { "vulnerability": "VCID-v1sz-wxb7-tkfh" } ], "resource_url": "http://public2.vulnerablecode.io/packages/pkg:maven/org.apache.zookeeper/zookeeper@3.9.0" }, { "url": "http://public2.vulnerablecode.io/api/packages/67309?format=api", "purl": "pkg:maven/org.apache.zookeeper/zookeeper@3.9.1", "is_vulnerable": true, "affected_by_vulnerabilities": [ { "vulnerability": "VCID-5pdc-3tk8-8bag" }, { "vulnerability": "VCID-jy5e-8syt-bueu" }, { "vulnerability": "VCID-k5d7-jzkg-4yda" }, { "vulnerability": "VCID-v1sz-wxb7-tkfh" } ], "resource_url": "http://public2.vulnerablecode.io/packages/pkg:maven/org.apache.zookeeper/zookeeper@3.9.1" }, { "url": "http://public2.vulnerablecode.io/api/packages/69421?format=api", "purl": "pkg:maven/org.apache.zookeeper/zookeeper@3.9.2", "is_vulnerable": true, "affected_by_vulnerabilities": [ { "vulnerability": "VCID-jy5e-8syt-bueu" }, { "vulnerability": "VCID-k5d7-jzkg-4yda" }, { "vulnerability": "VCID-v1sz-wxb7-tkfh" } ], "resource_url": "http://public2.vulnerablecode.io/packages/pkg:maven/org.apache.zookeeper/zookeeper@3.9.2" }, { "url": "http://public2.vulnerablecode.io/api/packages/83190?format=api", "purl": "pkg:maven/org.apache.zookeeper/zookeeper@3.9.3", "is_vulnerable": true, "affected_by_vulnerabilities": [ { "vulnerability": "VCID-jy5e-8syt-bueu" }, { "vulnerability": "VCID-v1sz-wxb7-tkfh" } ], "resource_url": "http://public2.vulnerablecode.io/packages/pkg:maven/org.apache.zookeeper/zookeeper@3.9.3" }, { "url": "http://public2.vulnerablecode.io/api/packages/70607?format=api", "purl": "pkg:maven/org.apache.zookeeper/zookeeper@3.9.4", "is_vulnerable": true, "affected_by_vulnerabilities": [ { "vulnerability": "VCID-jy5e-8syt-bueu" } ], "resource_url": "http://public2.vulnerablecode.io/packages/pkg:maven/org.apache.zookeeper/zookeeper@3.9.4" } ], "references": [ { "reference_url": "https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2026-24281.json", "reference_id": "", "reference_type": "", "scores": [ { "value": "7.4", "scoring_system": "cvssv3", "scoring_elements": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N" } ], "url": "https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2026-24281.json" }, { "reference_url": "https://api.first.org/data/v1/epss?cve=CVE-2026-24281", "reference_id": "", "reference_type": "", "scores": [ { "value": "0.0003", "scoring_system": "epss", "scoring_elements": "0.09002", "published_at": "2026-06-08T12:55:00Z" }, { "value": "0.0003", "scoring_system": "epss", "scoring_elements": "0.09065", "published_at": "2026-06-05T12:55:00Z" }, { "value": "0.0003", "scoring_system": "epss", "scoring_elements": "0.09082", "published_at": "2026-06-06T12:55:00Z" }, { "value": "0.0003", "scoring_system": "epss", "scoring_elements": "0.09061", "published_at": "2026-06-07T12:55:00Z" } ], "url": "https://api.first.org/data/v1/epss?cve=CVE-2026-24281" }, { "reference_url": "https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2026-24281", "reference_id": "", "reference_type": "", "scores": [], "url": "https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2026-24281" }, { "reference_url": "https://github.com/apache/zookeeper", "reference_id": "", "reference_type": "", "scores": [ { "value": "7.4", "scoring_system": "cvssv3.1", "scoring_elements": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N" }, { "value": "HIGH", "scoring_system": "generic_textual", "scoring_elements": "" } ], "url": "https://github.com/apache/zookeeper" }, { "reference_url": "https://github.com/apache/zookeeper/commit/66c4efecdda1302d9cfb3af9eedb122b74452bf3", "reference_id": "", "reference_type": "", "scores": [ { "value": "7.4", "scoring_system": "cvssv3.1", "scoring_elements": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N" }, { "value": "HIGH", "scoring_system": "generic_textual", "scoring_elements": "" } ], "url": "https://github.com/apache/zookeeper/commit/66c4efecdda1302d9cfb3af9eedb122b74452bf3" }, { "reference_url": "https://issues.apache.org/jira/browse/ZOOKEEPER-4986", "reference_id": "", "reference_type": "", "scores": [ { "value": "7.4", "scoring_system": "cvssv3.1", "scoring_elements": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N" }, { "value": "HIGH", "scoring_system": "generic_textual", "scoring_elements": "" } ], "url": "https://issues.apache.org/jira/browse/ZOOKEEPER-4986" }, { "reference_url": "https://lists.apache.org/thread/088ddsbrzhd5lxzbqf5n24yg0mwh9jt2", "reference_id": "", "reference_type": "", "scores": [ { "value": "5.9", "scoring_system": "cvssv3.1", "scoring_elements": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N" }, { "value": "7.4", "scoring_system": "cvssv3.1", "scoring_elements": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N" }, { "value": "HIGH", "scoring_system": "generic_textual", "scoring_elements": "" }, { "value": "Track", "scoring_system": "ssvc", "scoring_elements": "SSVCv2/E:N/A:N/T:P/P:M/B:A/M:M/D:T/2026-03-10T17:36:42Z/" } ], "url": "https://lists.apache.org/thread/088ddsbrzhd5lxzbqf5n24yg0mwh9jt2" }, { "reference_url": "http://www.openwall.com/lists/oss-security/2026/03/07/4", "reference_id": "", "reference_type": "", "scores": [ { "value": "7.4", "scoring_system": "cvssv3.1", "scoring_elements": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N" }, { "value": "HIGH", "scoring_system": "generic_textual", "scoring_elements": "" } ], "url": "http://www.openwall.com/lists/oss-security/2026/03/07/4" }, { "reference_url": "https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=1130496", "reference_id": "1130496", "reference_type": "", "scores": [], "url": "https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=1130496" }, { "reference_url": "https://bugzilla.redhat.com/show_bug.cgi?id=2445449", "reference_id": "2445449", "reference_type": "", "scores": [], "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2445449" }, { "reference_url": "https://nvd.nist.gov/vuln/detail/CVE-2026-24281", "reference_id": "CVE-2026-24281", "reference_type": "", "scores": [ { "value": "7.4", "scoring_system": "cvssv3.1", "scoring_elements": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N" }, { "value": "HIGH", "scoring_system": "generic_textual", "scoring_elements": "" } ], "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-24281" }, { "reference_url": "https://github.com/advisories/GHSA-7xrh-hqfc-g7qr", "reference_id": "GHSA-7xrh-hqfc-g7qr", "reference_type": "", "scores": [ { "value": "HIGH", "scoring_system": "cvssv3.1_qr", "scoring_elements": "" } ], "url": "https://github.com/advisories/GHSA-7xrh-hqfc-g7qr" }, { "reference_url": "https://access.redhat.com/errata/RHSA-2026:10184", "reference_id": "RHSA-2026:10184", "reference_type": "", "scores": [], "url": "https://access.redhat.com/errata/RHSA-2026:10184" }, { "reference_url": "https://access.redhat.com/errata/RHSA-2026:14272", "reference_id": "RHSA-2026:14272", "reference_type": "", "scores": [], "url": "https://access.redhat.com/errata/RHSA-2026:14272" }, { "reference_url": "https://access.redhat.com/errata/RHSA-2026:14276", "reference_id": "RHSA-2026:14276", "reference_type": "", "scores": [], "url": "https://access.redhat.com/errata/RHSA-2026:14276" }, { "reference_url": "https://access.redhat.com/errata/RHSA-2026:8509", "reference_id": "RHSA-2026:8509", "reference_type": "", "scores": [], "url": "https://access.redhat.com/errata/RHSA-2026:8509" } ], "weaknesses": [ { "cwe_id": 295, "name": "Improper Certificate Validation", "description": "The product does not validate, or incorrectly validates, a certificate." }, { "cwe_id": 297, "name": "Improper Validation of Certificate with Host Mismatch", "description": "The product communicates with a host that provides a certificate, but the product does not properly ensure that the certificate is actually associated with that host." }, { "cwe_id": 937, "name": "OWASP Top Ten 2013 Category A9 - Using Components with Known Vulnerabilities", "description": "Weaknesses in this category are related to the A9 category in the OWASP Top Ten 2013." }, { "cwe_id": 1035, "name": "OWASP Top Ten 2017 Category A9 - Using Components with Known Vulnerabilities", "description": "Weaknesses in this category are related to the A9 category in the OWASP Top Ten 2017." }, { "cwe_id": 350, "name": "Reliance on Reverse DNS Resolution for a Security-Critical Action", "description": "The product performs reverse DNS resolution on an IP address to obtain the hostname and make a security decision, but it does not properly ensure that the IP address is truly associated with the hostname." } ], "exploits": [], "severity_range_score": "5.9 - 8.9", "exploitability": "0.5", "weighted_severity": "8.0", "risk_score": 4.0, "resource_url": "http://public2.vulnerablecode.io/vulnerabilities/VCID-jy5e-8syt-bueu" }