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CVE-2026-57159

7.5, high

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

NVD (opens in a new tab) CVE.org (opens in a new tab)
CVSS
7.5, high high CVSS v3.1
EPSS, next 30 days
0.6% higher than 47.3% 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 673b978, a remote out-of-bounds read and write can occur in the SDP negotiator when the remote payload-type map maintenance feature is enabled. assign_pt_and_update_map() in pjmedia/src/pjmedia/sdp_neg.c uses payload-type numbers taken from a remote SDP offer or answer to index fixed-size internal tables without sufficient bounds validation, so a crafted remote SDP can cause memory access outside those tables. The practical impact is memory corruption and denial of service; code execution is not demonstrated. This path is only reached when PJMEDIA_SDP_NEG_MAINTAIN_REMOTE_PT_MAP is enabled. The default is disabled, so default builds are not affected; the feature is an interoperability option that integrating products may enable. This issue has been patched via commit 673b978.

Details

Vendor
Pjsip
Product
pjproject
Weakness
CWE-129 (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:N/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-2026-57162 Pjsip pjproject Stack-based Buffer Overflow Vulnerability EPSS 0.6% 9.1, critical
  • CVE-2026-57163 Pjsip pjproject Stack-based Buffer Overflow Vulnerability EPSS 0.4% 9.1, critical
  • CVE-2026-57161 Pjsip pjproject Stack-based Buffer Overflow Vulnerability EPSS 0.5% 8.2, high

Beyond this page

Is CVE-2026-57159 in your network?

This page tells you how dangerous CVE-2026-57159 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

    Until the patch is applied, Kondra monitors your network, events and endpoints in real time. It keeps an inventory of the software installed on every endpoint, and its anomaly detection rules flag what an attacker does once inside.

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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.