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CVE-2026-77396

7.1 · HIGH

PJSIP is a free and open source multimedia communication library written in C.

Published Sep 18, 2026teluuCWE-122EPSS 0.12%

Overview

CVE-2026-77396 is a high-severity vulnerability affecting teluu pjsip. It was published on September 18, 2026 and has a CVSS 3.1 base score of 7.1 (HIGH).

This vulnerability has a CVSS 3.1 base score of 7.1, rated HIGH. It requires local or adjacent network access to exploit. No authentication or special privileges are required for exploitation.

Technical description

PJSIP is a free and open source multimedia communication library written in C. In 2.17 and earlier, the PJSIP AVI parser in pjmedia/src/pjmedia/avi_player.c uses an input-file video chunk length as the number of bytes copied into a frame buffer whose capacity is derived from the declared media dimensions. A crafted AVI file can therefore cause an attacker-controlled out-of-bounds write past the heap allocation when an application plays the file or pulls its frames. The existing size assertion does not protect production release builds, where assertions are disabled. Typical local playback can crash the process, while applications that accept untrusted AVI sources expose a stronger memory-corruption condition. No fixed version is available as of this review.

Remediation

Check the references section for vendor advisories and patches from teluu. Update pjsip to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

Affected products

VendorProductVersionsStatus
teluupjsip0Affected

References

GitHubgithub.com/pjsip/pjproject/commit/7ecc6584969a923c4190b6912afbf5952b5a4b9fGitHubgithub.com/pjsip/pjproject/security/advisories/GHSA-6p2p-5wf8-h5hr

How CyberStrike helps

Frequently asked questions

What is CVE-2026-77396?

CVE-2026-77396 is a high-severity vulnerability affecting teluu pjsip. It was published on September 18, 2026 and has a CVSS 3.1 base score of 7.1 (HIGH).

How severe is CVE-2026-77396?

This vulnerability has a CVSS 3.1 base score of 7.1, rated HIGH. It requires local or adjacent network access to exploit. No authentication or special privileges are required for exploitation.

How do I fix or remediate CVE-2026-77396?

Check the references section for vendor advisories and patches from teluu. Update pjsip to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

How can CyberStrike help with CVE-2026-77396?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2026-77396 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

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