CVE-2026-26967 — Heap-based Buffer Overflow in Pjproject

CWE-122 — Heap-based Buffer OverflowCWE-120 — Classic Buffer Overflow4 documents4 sources
Severity
8.1HIGHNVD
EPSS
0.0%
top 97.50%
CISA KEV
Not in KEV
Exploit
No known exploits
Affected products
2
Pjsip PjprojectPjsip
Timeline
PublishedFeb 20

Description

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…

CVSS vector

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

Affected Packages2 packages

▶CVEListV5pjsip/pjproject< f821c214e52b11bae11e4cd3c7f0864538fb5491
▶NVDpjsip/pjsip< 2.17

Patches

Patch: github.com ↗Patch: github.com ↗

🔴Vulnerability Details

1
OSV
CVE-2026-26967: PJSIP is a free and open source multimedia communication library written in C↗2026-02-20
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📋Vendor Advisories

1
Red Hat
pjsip: PJSIP: Arbitrary code execution via H.264 unpacketizer heap-based buffer overflow↗2026-02-20
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🕵️Threat Intelligence

1
Wiz
CVE-2026-26967 Impact, Exploitability, and Mitigation Steps | Wiz↗
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CVE-2026-26967 — Heap-based Buffer Overflow | cvebase