CVE-2026-53449: coturn_project coturn External Control of File Name or Path
Vulnerability summary
CVE-2026-53449 is a medium (CVSS 6.0) External Control of File Name or Path vulnerability in coturn_project coturn. EPSS estimates a 0.21% chance of exploitation in the next 30 days, higher than 10.2% of scored vulnerabilities. 1 public exploit is recorded.
Advisory lineage
Upstream 0 · Downstream 1 · Related 1Timeline
- 10-07-2026PublishedVulnerability first disclosed.
- 13-07-2026Last modifiedVulnerability information updated.
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.
CVSS metrics
4 scores · 4 sources · 1 version- OSV · UbuntuEcosystem advisory · calculated6.0MediumCVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:H/A:H
- OSV · DebianEcosystem advisory · calculated6.0MediumCVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:H/A:H
- NVDNIST6.0MediumCVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:H/A:H
EPSS trend
Probability
0.21%
Chance of exploitation in the next 30 days
Percentile
10%
Versus all other CVEs
30-day change
0.00 pp
From 0.21% on 21-09-2026
Known exploited
Compare KEV catalogsNot in any of the 3 tracked catalogs.
Public exploits
1 foundCoturn
Maturity: poc
Weaknesses
CWE · root causeAffected systems
Coturn1 product
- coturn< 4.13.0
Coturn_project1 product
- coturn< 4.13.0
Debian1 product
- coturnAll versions (No fix recorded) | < 4.14.0-1
Ubuntu1 product
- coturnAll versions (No fix recorded)
4 vendors · 4 products
References
6 links- github.com/coturn/coturn/security/advisories/GHSA-jj76-vwjw-w34rX Refsource CONFIRMREPORTExploitThird Party Advisory
