VDB
CVE-2026-73215
CVE-2026-73215
PUBLISHED
CVSS 7.1 HIGH
Reported by GitHub_M · Published August 11, 2026
Coturn is a free open source implementation of TURN and STUN Server. Prior to 4.17.0, turnports_allocate_even() in src/apps/relay/turn_ports.c marks the unused odd sibling port as TPS_TAKEN_ODD for an EVEN-PORT Allocate request with reservation bit R=0 even though no RTCP socket will release it, allowing an authenticated client to permanently exhaust the relay port pool and cause subsequent allocations to fail with STUN error 508. This issue is fixed in version 4.17.0.
Risk Scores
CVSS 4.0
7.1
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| coturn | coturn | < 4.17.0 |
| coturn | coturn | < 4.17.0, < 4.17.0 |
Timeline
- Aug 11, 2026 CVE Published
- Aug 12, 2026 Coalition ESS Score
- Aug 13, 2026 CVE Updated
- Aug 15, 2026 Security Advisory
- Aug 24, 2026 EPSS Score
- Aug 26, 2026 EPSS Score
- Aug 30, 2026 EPSS Score
- Sep 4, 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-847g-qmc6-6m4r x_refsource_CONFIRM
- https://github.com/coturn/coturn/commit/4adbd82e78456e13109bf44deed4ec3aceb0bab2 x_refsource_MISC
- https://github.com/coturn/coturn/releases/tag/4.17.0 x_refsource_MISC