Medium 5.3Published Jul 31, 2026

CVE-2026-54909Pion STUN vulnerable to remote denial of service via panic while parsing a malformed XOR-MAPPED-ADDRESS attribute

Updated under an hour ago (2026-10-19 11:10 UTC)

Does this affect you?

It affects pion stun. Add what you run to find out whether that includes you.

No exploitation reported and no EPSS estimate yet.

Do this next

Start free and add your stack

Free account, 1 product

Every CVE for pion stun

Exploited in the last 30 days

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.

CVSS: 5.3 MEDIUM (v3.1, CNA)CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
Weakness (CWE): CWE-20
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: GitHub_M
NVD analysis: Awaiting Analysis
Record last updated: Aug 3, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

pion stun pion:stun (from the name)	before 3.1.3	CNA record

References

https://github.com/pion/stun/security/advisories/GHSA-34rh-wp3j-6cxcx-refsource-confirm
https://github.com/pion/stun/pull/278x-refsource-misc
https://github.com/pion/stun/commit/fa9f074a33a8059c76c960b1fbee39f308002423x-refsource-misc
https://github.com/pion/stun/releases/tag/v3.1.3x-refsource-misc

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.