What’s Vulnerable › Vulnerabilities

CVE-2026-53449: Coturn: Arbitrary File Write via CLI psd Command

• Severity: medium (CVSS 6.0 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.2% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2026-07-10 · updated 2026-07-16
• Weakness: CWE-73

Description

Coturn is a free open source implementation of TURN and STUN Server. Prior to 4.13.0, the psd print sessions dump CLI command in coturn takes a filename argument and directly passes it to fopen with no path validation. An authenticated admin with CLI access can overwrite arbitrary files writable by the coturn process because the command string is used as-is after stripping the psd prefix and leading spaces, allowing truncation and overwrite with session dump data. This issue is fixed in version 4.13.0.

Affected products

• coturn: before 4.13.0 — fixed in 4.13.0

How to fix

Upgrade to a fixed version: coturn 4.13.0. Check the vendor advisory for mitigations.

References

• https://github.com/coturn/coturn/commit/e72930f571beba3bc7a9f97661af2614aae92a55
• https://github.com/coturn/coturn/releases/tag/4.13.0
• https://github.com/coturn/coturn/security/advisories/GHSA-jj76-vwjw-w34r
• https://github.com/coturn/coturn/security/advisories/GHSA-jj76-vwjw-w34r

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