CVE-2026-57159

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.

CVSS v3 7.5 HIGH

7.5^/10

CVSS v3 : HIGH

Vector :

Exploitability : 3.9 / Impact : 3.6

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact HIGH

Scope UNCHANGED

References

Link	Resource
https://github.com/pjsip/pjproject/commit/673b978aab1fe3ab874247be32c871acc880cbeb	Patch
https://github.com/pjsip/pjproject/security/advisories/GHSA-rfwg-w9gq-9mw2	Patch Vendor Advisory

Configurations

Configuration 1 (hide)

cpe:2.3:a:teluu:pjsip:*:*:*:*:*:*:*:*

History

No history.

Information

Published : 2026-09-04 18:17

Updated : 2026-09-11 15:30

NVD link : CVE-2026-57159

Mitre link : CVE-2026-57159

CVE.ORG link : CVE-2026-57159

JSON object : View

Products Affected

teluu

pjsip

CWE

CWE-129

Improper Validation of Array Index

CWE-787

Out-of-bounds Write

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