CVE-2026-54909

Pion STUN vulnerable to remote denial of service via panic while parsing a malformed XOR-MAPPED-ADDRESS attribute

State: Published
Severity: 5.3 Medium
Published: Jul 31, 2026
Updated: Aug 3, 2026
Reserved: Jun 16, 2026

Description

pion/stun is a Go implementation of STUN. Prior to 3.1.3, XORMappedAddress.GetFromAs can panic while parsing a malformed short XOR-MAPPED-ADDRESS attribute in STUN or ICE Binding-response parsing paths, allowing remote denial of service. This issue is fixed in version 3.1.3.

Scores

CVSS	Score	Vector	Source
3.1	5.3 Medium	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L	GitHub_M

Weaknesses

CWE-20 Improper Input Validation

Affected Products

Product	Versions
stunpion	< 3.1.3Affected

References

https://github.com/pion/stun/security/advisories/GHSA-34rh-wp3j-6cxc
https://github.com/pion/stun/pull/278
https://github.com/pion/stun/commit/fa9f074a33a8059c76c960b1fbee39f308002423
https://github.com/pion/stun/releases/tag/v3.1.3

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