Medium severity · published Jul 10, 2026
CVE-2026-53449
Coturn: Arbitrary File Write via CLI psd Command
6.0
CVSS
0.2%
EPSS
No
On KEV
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 vector
CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:H/A:H
Attack vector
Local
Complexity
Low
Privileges
High
User interaction
None
Confidentiality
None
Integrity
High
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.2% · higher than 11% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
CO
coturn · coturn
< 4.13.0 · source: vendor, NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-53449
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-53449
Patch
https://github.com/coturn/coturn/commit/e72930f571beba3bc7a9f97661af2614aae92a55
Release Notes
https://github.com/coturn/coturn/releases/tag/4.13.0
Exploit
https://github.com/coturn/coturn/security/advisories/GHSA-jj76-vwjw-w34r
More from coturn
9.8
CVE-2026-43994
Coturn: Stack buffer overflow in decode_oauth_token_gcm()
8.2
CVE-2026-73214
coturn allocates a full per-peer SSL/session before verifying the DTLS cookie, enabling source-spoofing/botnet state-exhaustion DoS
8.2
CVE-2026-62959
Coturn: Pre-authentication heap memory disclosure in ACME redirect (`try_acme_redirect`)
7.7
CVE-2025-69217
Coturn has unsafe nonce and relay port randomization due to weak random number generation.
7.5
CVE-2026-40613
Coturn: Misaligned Memory Access in coturn STUN Attribute Parser (Remote DoS on ARM64)