Cyber Resilience

CVE-2026-26967

High

Published: 20 February 2026

Published
20 February 2026
Modified
20 February 2026
KEV Added
—
Patch
—
CVSS Score v4 8.1 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/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
EPSS Score 0.0029 20.5th percentile
Risk Priority 55 floored blend · peak EPSS

Summary

CVE-2026-26967 is a high-severity Heap-based Buffer Overflow (CWE-122) vulnerability in Pjsip Pjsip. Its CVSS base score is 8.1 (High).

Operationally, exploitation aligns with the MITRE ATT&CK technique Exploit Public-Facing Application (T1190); ranked at the 20.5th percentile by exploit likelihood (below the median); it is not currently listed in the CISA KEV catalog.

EU & UK References

Vulnerability details

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…

more

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/pjsip/pjproject/commit/f821c214e52b11bae11e4cd3c7f0864538fb5491.

CWE(s)
CWE-122

Related Threats

MITRE ATT&CK Enterprise TechniquesAI

T1190 Exploit Public-Facing Application Initial Access
Adversaries may attempt to exploit a weakness in an Internet-facing host or system to initially access a network.
attack.mitre.org →
Why these techniques?

Remote heap buffer overflow in network packet processing (H.264/SRTP) directly enables remote exploitation of public-facing apps or services using the library.

Confidence: MEDIUM · MITRE ATT&CK Enterprise v19.0

Affected Assets

pjsip
pjsip
≤ 2.17

Mitigating Controls

No mitigating controls mapped yet. The per-CVE control annotator has not reached this CVE.

References