What is CVE-2026-54909?

CVE-2026-54909 is a medium-severity vulnerability in Pion Stun, classified under Improper Input Validation. CVSS score: 5.3/10. Published 2026-07-31.

How severe is CVE-2026-54909?

Medium severity. CVSS v3 base score is 5.3 out of 10.

Improper input validation in Pion Stun

CVE-2026-54909

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. T…

Vulnerability class: Drupalgeddon 2 (CVE-2018-7600)

CVSS v3 metric

CVSS v3 base score 5.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L.

Affected products

Pion Stun — versions < 3.1.3

Weakness classification (CWE)

CWE-20 — Improper Input Validation

References

security-advisories@github.com (x_refsource_CONFIRM)
security-advisories@github.com (x_refsource_MISC)
security-advisories@github.com (x_refsource_MISC)
security-advisories@github.com (x_refsource_MISC)

Frequently asked questions

What is CVE-2026-54909?: CVE-2026-54909 is a medium-severity vulnerability in Pion Stun, classified under Improper Input Validation. CVSS score: 5.3/10. Published 2026-07-31.
How severe is CVE-2026-54909?: Medium severity. CVSS v3 base score is 5.3 out of 10.