Insufficient Verification of Data Authenticity Affecting coturn package, versions <4.15.0-1
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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Test your applications- Snyk IDSNYK-DEBIANUNSTABLE-COTURN-19166282
- published22 Aug 2026
- disclosed19 Aug 2026
Introduced: 19 Aug 2026
NewCVE-2026-68554 (opens in a new tab)How to fix?
Upgrade Debian:unstable coturn to version 4.15.0-1 or higher.
NVD Description
Note: Versions mentioned in the description apply only to the upstream coturn package and not the coturn package as distributed by Debian.
See How to fix? for Debian:unstable relevant fixed versions and status.
Coturn is a free open source implementation of TURN and STUN Server. Prior to 4.15.0, an on-path attacker can append attributes after MESSAGE-INTEGRITY to an authenticated STUN request on plain UDP or TCP, adjust the STUN header length, and recompute the unkeyed FINGERPRINT while the original HMAC remains valid because it covers only the message prefix. Server-side parsing in src/server/ns_turn_server.c continues past MESSAGE-INTEGRITY through handle_turn_allocate(), handle_turn_create_permission(), handle_turn_refresh(), and handle_turn_command(), allowing trailing LIFETIME, XOR-PEER-ADDRESS, or ORIGIN attributes to override allocation lifetime, inject a permission, or bypass the origin check. TLS and DTLS deployments prevent this in-transit modification. This issue is fixed in version 4.15.0.