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

Moderate severity GitHub Reviewed Published Jun 9, 2026 in pion/stun • Updated Jul 31, 2026

Package

gomod github.com/pion/stun (Go)

Affected versions

<= 1.23.1

Patched versions

None
gomod github.com/pion/stun/v2 (Go)
<= 2.0.0
None
gomod github.com/pion/stun/v3 (Go)
<= 3.1.4
3.1.5

Description

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 pion/stun#278 which fixes the issue.

Workarounds

No work around; please upgrade to v3.1.5 or a newer version.

References

@JoTurk JoTurk published to pion/stun Jun 9, 2026
Published to the GitHub Advisory Database Jul 31, 2026
Reviewed Jul 31, 2026
Last updated Jul 31, 2026

Severity

Moderate

CVSS overall score

This score calculates overall vulnerability severity from 0 to 10 and is based on the Common Vulnerability Scoring System (CVSS).
/ 10

CVSS v3 base metrics

Attack vector
Network
Attack complexity
Low
Privileges required
None
User interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
Low

CVSS v3 base metrics

Attack vector: More severe the more the remote (logically and physically) an attacker can be in order to exploit the vulnerability.
Attack complexity: More severe for the least complex attacks.
Privileges required: More severe if no privileges are required.
User interaction: More severe when no user interaction is required.
Scope: More severe when a scope change occurs, e.g. one vulnerable component impacts resources in components beyond its security scope.
Confidentiality: More severe when loss of data confidentiality is highest, measuring the level of data access available to an unauthorized user.
Integrity: More severe when loss of data integrity is the highest, measuring the consequence of data modification possible by an unauthorized user.
Availability: More severe when the loss of impacted component availability is highest.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L

EPSS score

Exploit Prediction Scoring System (EPSS)

This score estimates the probability of this vulnerability being exploited within the next 30 days. Data provided by FIRST.
(30th percentile)

Weaknesses

Improper Input Validation

The product receives input or data, but it does not validate or incorrectly validates that the input has the properties that are required to process the data safely and correctly. Learn more on MITRE.

CVE ID

CVE-2026-54909

GHSA ID

GHSA-34rh-wp3j-6cxc

Source code

Credits

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