VDB
CVE-2026-68552
CVE-2026-68552
PUBLISHED
CVSS 5.3 MEDIUM
Reported by GitHub_M · Published August 19, 2026
Coturn is a free open source implementation of TURN and STUN Server. Prior to 4.15.0, an unauthenticated remote client can send a STUN message over TCP or TLS with a body-length field from 65520 through 65532, causing the uint16_t len variable in stun_get_message_len_str() in src/client/ns_turn_msg.c to wrap when STUN_HEADER_LENGTH is added. The framing layer then consumes only 4 through 16 bytes, treats the remaining bytes as another message, desynchronizes the stream parser, and drops the attacking client's connection. Other clients and the server process are not affected. This issue is fixed in version 4.15.0.
Risk Scores
CVSS 3.1
5.3
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| coturn | coturn | < 4.15.0 |
| coturn | coturn | < 4.15.0, < 4.15.0 |
Timeline
- Aug 19, 2026 CVE Published
- Aug 19, 2026 CVE Updated
- Aug 20, 2026 Coalition ESS Score
- Aug 24, 2026 EPSS Score
- Aug 27, 2026 EPSS Score
- Sep 2, 2026 EPSS Score
- Sep 2, 2026 Security Advisory
- Sep 6, 2026 EPSS Score
- Sep 9, 2026 EPSS Score
- Sep 12, 2026 EPSS Score
- Sep 16, 2026 EPSS Score
- Sep 18, 2026 EPSS Score
References
- https://github.com/coturn/coturn/security/advisories/GHSA-m562-mf7x-q7rr x_refsource_CONFIRM
- https://github.com/coturn/coturn/pull/1964 x_refsource_MISC
- https://github.com/coturn/coturn/commit/ed32e1fb6c843f9cf9a28d91c541dfbf40874f25 x_refsource_MISC
- https://github.com/coturn/coturn/releases/tag/4.15.0 x_refsource_MISC