Pion STUN vulnerable to remote denial of service via panic while parsing a malformed XOR-MAPPED-ADDRESS attribute
Priority LOW 31CWE-20Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- Low
- Impact type
- —
- Confidentiality · integrity · availability
- None · None · Low
- Fix status
- Fixed
Attack profile from CVSS 3.1 · CNA. Fix status from CNA and GitHub.
Summary
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.
Why it matters now
Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00644 51st percentileScored 2026-11-07
Fix Fixed stun (pion): 3.1.3github.com/pion/stun/v3 (Go): 3.1.5
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- None
- Automatable
- Yes
- Technical impact
- Partial
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| pion | stun | before 3.1.3 | 3.1.3 | Patch available | CNA |
| — | github.com/pion/stun/v3 (Go) | before 3.1.5 | 3.1.5 | Patch available | GHSA-34rh-wp3j-6cxc |
| — | github.com/pion/stun/v2 (Go) | up to 2.0.0 | — | No fix listed | GHSA-34rh-wp3j-6cxc |
| — | github.com/pion/stun (Go) | up to 1.23.1 | — | No fix listed | GHSA-34rh-wp3j-6cxc |
- stun Vendorpion Affected before 3.1.3 Fixed in 3.1.3 Patch available CNA
- github.com/pion/stun/v3 (Go) Vendor— Affected before 3.1.5 Fixed in 3.1.5 Patch available GHSA-34rh-wp3j-6cxc
- github.com/pion/stun/v2 (Go) Vendor— Affected up to 2.0.0 Fixed in — No fix listed GHSA-34rh-wp3j-6cxc
- github.com/pion/stun (Go) Vendor— Affected up to 1.23.1 Fixed in — No fix listed GHSA-34rh-wp3j-6cxc
Remediation
- Fix · CNA stun (pion) Fixed in 3.1.3
- Fix · GHSA-34rh-wp3j-6cxc github.com/pion/stun/v3 (Go) Fixed in 3.1.5 Advisory →
Timeline
- 2026-10-02 Threatist record created from CVE-2026-54909
- 2026-10-03 Alias added: GHSA-34rh-wp3j-6cxc
- 2026-10-21 EPSS moved to the 50th–90th percentile
References
More pion vulnerabilities
- TI-2019-15006 handleIncomingPacket in conn.go in Pion DTLS before 1.5.2 lacks a check for application… CVSS 3.1CRITICAL 9.8
- TI-2022-11733 Header reconstruction method can be thrown into an infinite loop in Pion DTLS CVSS 3.1HIGH 7.5
- TI-2025-31220 Pion Interceptor's improper RTP padding handling allows remote crash for SFU users (DoS) CVSS 3.1HIGH 7.5
- TI-2022-11765 Improper Certificate Validation in Pion DTLS CVSS 3.1HIGH 7.5
- TI-2022-11732 Buffer for inbound DTLS fragments has no limit CVSS 3.1MEDIUM 5.3
- TI-2026-39680 Pion DTLS: Denial of service via panic while parsing a crafted ECDHE_PSK ServerKeyExchange message CVSS 4.0MEDIUM 6.3
Sources
- CVE-2026-54909 · CVE Program
- CVE-2026-54909 · NVD
- FIRST EPSS
- GHSA-34rh-wp3j-6cxc · GitHub Advisory Database · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences