Vulnerability · Published Jul 10, 2026 · Assigned by GitHub_M
CVE-2026-53449Coturn: Arbitrary File Write via CLI psd Command
Medium 6.0
In plain English
A medium-severity security flaw in coturn from coturn. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.2% (higher than 11% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Official 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 packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian:12 | coturn | no fix listed | DEBIAN-CVE-2026-53449 |
| Debian:13 | coturn | no fix listed | DEBIAN-CVE-2026-53449 |
| Debian:14 | coturn | 4.14.0-1 | DEBIAN-CVE-2026-53449 |
| Ubuntu:22.04:LTS | coturn | no fix listed | UBUNTU-CVE-2026-53449 |
| Ubuntu:24.04:LTS | coturn | no fix listed | UBUNTU-CVE-2026-53449 |
| Ubuntu:26.04:LTS | coturn | no fix listed | UBUNTU-CVE-2026-53449 |
| Ubuntu:26.10 | coturn | no fix listed | UBUNTU-CVE-2026-53449 |
Affected products (as reported)
Weakness: CWE-73 · Vector: CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:H/A:H
References
- https://github.com/coturn/coturn/security/advisories/GHSA-jj76-vwjw-w34r x_refsource_CONFIRM
- https://github.com/coturn/coturn/commit/e72930f571beba3bc7a9f97661af2614aae92a55 x_refsource_MISC
- https://github.com/coturn/coturn/releases/tag/4.13.0 x_refsource_MISC