Coturn is a free open source implementation of TURN and STUN Server. Prior to 4.13.1, good_peer_addr() in src/server/ns_turn_server.c uses ioa_addr_in_range() in src/client/ns_turn_ioaddr.c without canonicalizing IPv4-compatible, 6to4, and 64:ff9b::/96 NAT64 address forms, allowing an authenticated RFC 6062 TCP CONNECT relay client to bypass an IPv4 denied-peer-ip range when the Coturn host has a useful translation route. This issue is fixed in version 4.13.1.
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History
Tue, 11 Aug 2026 18:30:00 +0000
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Tue, 11 Aug 2026 17:45:00 +0000
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| Description | Coturn is a free open source implementation of TURN and STUN Server. Prior to 4.13.1, good_peer_addr() in src/server/ns_turn_server.c uses ioa_addr_in_range() in src/client/ns_turn_ioaddr.c without canonicalizing IPv4-compatible, 6to4, and 64:ff9b::/96 NAT64 address forms, allowing an authenticated RFC 6062 TCP CONNECT relay client to bypass an IPv4 denied-peer-ip range when the Coturn host has a useful translation route. This issue is fixed in version 4.13.1. | |
| Title | coturn peer-IP ACL canonicalization & scope bypass on the RFC 6062 TCP CONNECT relay path → internal-network SSRF and proven internal root RCE | |
| Weaknesses | CWE-284 CWE-918 |
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cvssV4_0
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Status: PUBLISHED
Assigner: GitHub_M
Published:
Updated: 2026-08-11T17:44:17.467Z
Reserved: 2026-08-11T14:41:20.121Z
Link: CVE-2026-73212
Updated: 2026-08-11T17:44:11.572Z
Status : Received
Published: 2026-08-11T18:18:26.490
Modified: 2026-08-11T18:18:26.490
Link: CVE-2026-73212
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OpenCVE Enrichment
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