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CVE-2026-57162

9.1, critical

Pjsip pjproject Stack-based Buffer Overflow Vulnerability

NVD (opens in a new tab) CVE.org (opens in a new tab)
CVSS
9.1, critical critical CVSS v3.1
EPSS, next 30 days
0.6% higher than 49.5% of scored CVEs
Exploitation
No public evidence
Published
4 Sept 2026a month ago

Description

PJSIP is a free and open source multimedia communication library written in C. Prior to commit a1b707c, a stack buffer overflow exists in the SRTP/SDES media transport when processing a=crypto attributes during SDP offer/answer (sdes_encode_sdp() in transport_srtp_sdes.c). This affects applications with SRTP enabled (use_srtp optional or mandatory, using SDES keying). During media negotiation, the crypto attributes from the remote SDP are collected into a fixed-size array without bounding their number; a remote peer that includes an excessive number of a=crypto attributes in a single media description can write past the end of that array on the stack. This is reachable from an incoming SIP INVITE during offer/answer, before application-level authentication. Impact may range from unexpected application termination to control flow hijack/memory corruption. Applications that do not enable SRTP are not affected. This issue has been patched via commit a1b707c.

Details

Vendor
Pjsip
Product
pjproject
Weakness
CWE-121 (opens in a new tab)
Status
Analyzed
Updated
11 Sept 2026
Assigner
security-advisories@github.com

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H

References 2

Patches and fixes 2

The kind is read from NVD's tags where present and from the shape of the URL otherwise, so treat it as a hint.

Other Pjsip CVEs

Every Pjsip CVE we hold

Same vendor in what we hold, not a known link between the flaws.

  • CVE-2026-77396 Pjsip pjproject Heap-based Buffer Overflow Vulnerability EPSS 0.2% 7.1, high
  • CVE-2026-57163 Pjsip pjproject Stack-based Buffer Overflow Vulnerability EPSS 0.4% 9.1, critical
  • CVE-2026-57159 PJSIP is a free and open source multimedia communication library written in C EPSS 0.6% 7.5, high
  • CVE-2026-57161 Pjsip pjproject Stack-based Buffer Overflow Vulnerability EPSS 0.5% 8.2, high

Beyond this page

Is CVE-2026-57162 in your network?

This page tells you how dangerous CVE-2026-57162 is out there. Whether it sits on one of your devices, only a scan of your own network can tell. That is what our systems do, every day, for the companies we protect.

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  • EXYS7950 KONDRA

    Detect it if it's exploited

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Check your exposure

Assembled from the NVD 2.0 API, the CISA Known Exploited Vulnerabilities Catalog and FIRST EPSS. Scores are as of our last collection on 17 Oct 2026, not the live upstream state.