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CVE-2026-26967

PJSIP is a free and open source multimedia communication library written in C. In versions 2.16 and below, there is a critical Heap-based Buffer Overflow vulnerability in PJSIP's H.264 unpacketizer. The bug occurs when processing malformed SRTP packets, where the unpacketizer reads a 2-byte NAL unit size field without validating that both bytes are within the payload buffer bounds. The vulnerability affects applications that receive video using H.264. A patch is available at https://github.com/p
Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:5dc5fe9a95439d206923c8209d9df1f31ba1c9d3fa5c66d6b560d75f26fcd9cc
Known exploited
Not asserted
Disputed
No
Stale source
No
Conflicts
0

Affected products and versions

1 source assertion
{"product":"pjproject","vendor":"pjsip","versions":[{"status":"affected","version":"< f821c214e52b11bae11e4cd3c7f0864538fb5491"}]}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:80b8f5109b3041f3bda478fe2530482394a9b6ea7f8f733f8fecea5f4e7543e7 · sha256:da508bf070e3c85c… · /containers/cna/affected/0

Provider-owned CVSS observations

1 source assertion
{"metric":{"attackComplexity":"LOW","attackRequirements":"NONE","attackVector":"NETWORK","baseScore":8.1,"baseSeverity":"HIGH","privilegesRequired":"NONE","subAvailabilityImpact":"NONE","subConfidentialityImpact":"NONE","subIntegrityImpact":"NONE","userInteraction":"NONE","vectorString":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U","version":"4.0","vulnAvailabilityImpact":"HIGH","vulnConfidentialityImpact":"HIGH","vulnIntegrityImpact":"HIGH"},"metric_type":"cvssV4_0"}
  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:80b8f5109b3041f3bda478fe2530482394a9b6ea7f8f733f8fecea5f4e7543e7 · sha256:da508bf070e3c85c… · /containers/cna/metrics/0/cvssV4_0

CWE assertions

1 source assertion
{"cweId":"CWE-122","description":"CWE-122: Heap-based Buffer Overflow","lang":"en","type":"CWE"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:80b8f5109b3041f3bda478fe2530482394a9b6ea7f8f733f8fecea5f4e7543e7 · sha256:da508bf070e3c85c… · /containers/cna/problemTypes/0/descriptions/0

Source references

2 source assertions
{"name":"https://github.com/pjsip/pjproject/commit/f821c214e52b11bae11e4cd3c7f0864538fb5491","tags":["x_refsource_MISC"],"url":"https://github.com/pjsip/pjproject/commit/f821c214e52b11bae11e4cd3c7f0864538fb5491"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:80b8f5109b3041f3bda478fe2530482394a9b6ea7f8f733f8fecea5f4e7543e7 · sha256:da508bf070e3c85c… · /containers/cna/references/1
{"name":"https://github.com/pjsip/pjproject/security/advisories/GHSA-x2hc-6969-g8v6","tags":["x_refsource_CONFIRM"],"url":"https://github.com/pjsip/pjproject/security/advisories/GHSA-x2hc-6969-g8v6"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:80b8f5109b3041f3bda478fe2530482394a9b6ea7f8f733f8fecea5f4e7543e7 · sha256:da508bf070e3c85c… · /containers/cna/references/0

Attribution and limitations

  • CVE Program CVEList V5: Reproduce the MITRE copyright designation and CVE license in copies. Source →

Provider severity values are preserved separately. Baitaphish does not convert them into a risk rating, infer affected products, or treat EPSS as observed exploitation.

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