CVE-2026-54909Published

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

Collected exploitation and prediction evidence

CISA KEV is observed exploitation evidence. FIRST EPSS is a dated prediction of exploitation in the next 30 days. Missing scores are unknown. This collector requests predictions only for explicit CVE aliases in the public NuGet archive; Microsoft release views retain their existing prediction scope.

No collected risk observation for these identifiers. This does not establish absence of exploitation or a zero probability.

cve-program · CVE-2026-54909

Published

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.

Source published: 31 Jul 2026 22:03:53 UTC
Source modified: 3 Aug 2026 17:30:22 UTC
Observed here: 23 Oct 2026 15:48:27 UTC
Source terms: CVE Program Terms of Use

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CVSS 3.1 · 5.3 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L

nvd · CVE-2026-54909

Published

NVD analysis and CPE criteria are source context, not proof that a package or your environment is affected. Complete affected data, logical configurations and SSVC are retained in the original JSON.

Source analysis status: Awaiting Analysis

Weakness classifications: CWE-20

Original publisher date fields

published: 2026-07-31T23:17:25.433

lastModified: 2026-10-23T23:10:00.157

Source published: 31 Jul 2026 23:17:25 UTC
Source modified: 23 Oct 2026 23:10:00 UTC
Observed here: 25 Oct 2026 13:17:34 UTC
Source terms: NIST NVD usage terms; underlying source attribution retained

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This view projects the publisher's source fields for reading; the original JSON retains additional fields and CVE enrichment containers. Attribution: nvd · NIST NVD usage terms; underlying source attribution retained. Source text is retained; field grouping and change labels are provided by ChangeIntel.

CVSS 3.1 · [email protected] · Secondary · 5.3 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L

osv · GHSA-34rh-wp3j-6cxc

Published

### 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.

Source published: 31 Jul 2026 22:03:42 UTC
Source modified: 10 Sep 2026 03:50:51 UTC
Observed here: 24 Oct 2026 13:19:41 UTC
Source terms: GitHub Advisory Database · CC-BY-4.0

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This view projects the publisher's source fields for reading; the original JSON retains additional fields and CVE enrichment containers. Attribution: osv · GitHub Advisory Database · CC-BY-4.0. Source text is retained; field grouping and change labels are provided by ChangeIntel.

CVSS_V3 · CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L

Publisher rating · MODERATE

osv · GO-2026-6163

Published

In github.com/pion/stun/v3 before 3.1.5, XORMappedAddress.GetFromAs reads the address family header from an XOR-MAPPED-ADDRESS attribute before validating the attribute length. Parsing a malformed STUN message carrying a zero-length XOR-MAPPED-ADDRESS attribute from a tightly sized buffer causes a slice bounds out of range panic, resulting in a denial of service.

Source published: 18 Aug 2026 16:38:10 UTC
Source modified: 1 Sep 2026 03:55:58 UTC
Observed here: 24 Oct 2026 13:19:41 UTC
Source terms: OSV · upstream source license applies

Original source record · Cite this exact observation · Complete original publisher JSON

This view projects the publisher's source fields for reading; the original JSON retains additional fields and CVE enrichment containers. Attribution: osv · OSV · upstream source license applies. Source text is retained; field grouping and change labels are provided by ChangeIntel.