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

Summary

### Impact Remote denial of service via panic while parsing a malformed XOR-MAPPED-ADDRESS attribute ### Patches Upgrade to v3.1.5 or later. This version includes this patch https://github.com/pion/stun/pull/278 which fixes the issue. ### Workarounds No work around; please upgrade to v3.1.5 or a newer version.

Timeline

Published by source

2026-08-01

Risk context

• Reported severity or threat level: medium.
• Review exposure for the affected product or family: go: github.com/pion/stun/v3 | go: github.com/pion/stun/v2 | go: github.com/pion/stun.

Product

go: github.com/pion/stun/v3 | go: github.com/pion/stun/v2 | go: github.com/pion/stun

What to do

General, cautious steps (verify details in the official source):

• Review exposure and plan remediation based on risk and environment.
• Identify affected product versions in your inventory and verify whether you are impacted.
• Apply vendor patches/updates or recommended mitigations as soon as available.
• Read the official advisory for exact affected versions and remediation steps.

Official advisory

• Read the official source
• CVE Record
• NVD

Evidence and provenance

Canonical advisory ID

CVE-2026-54909

Source

GitHub

Vendor

GitHub

Published by source

2026-08-01

Last source activity

2026-08-01

Additional identifiers

GHSA-34RH-WP3J-6CXC

Curated by

hlukh.ch

Related advisories and connections

These advisories are connected by shared CVE, product, vendor, source, or time signals.