CVE-2026-73212

A flaw was found in Coturn. An authenticated client using the RFC 6062 TCP CONNECT relay path can bypass intended IPv4 denied-peer-ip range restrictions due to improper canonicalization of IPv4-compatible, 6to4, and NAT64 address forms. This vulnerability can lead to Server-Side Request Forgery...

CVE-2026-73212 coturn peer-IP ACL canonicalization & scope bypass on the RFC 6062 TCP CONNECT relay path → internal-network SSRF and proven internal root RCE

Coturn is a free open source implementation of TURN and STUN Server. Prior to 4.13.1, goodpeeraddr in src/server/nsturnserver.c uses ioaaddrinrange in src/client/nsturnioaddr.c without canonicalizing IPv4-compatible, 6to4, and 64:ff9b::/96 NAT64 address forms, allowing an authenticated RFC 6062 T...

CVE-2026-73212 coturn peer-IP ACL canonicalization & scope bypass on the RFC 6062 TCP CONNECT relay path → internal-network SSRF and proven internal root RCE

Coturn is a free open source implementation of TURN and STUN Server. Prior to 4.13.1, goodpeeraddr in src/server/nsturnserver.c uses ioaaddrinrange in src/client/nsturnioaddr.c without canonicalizing IPv4-compatible, 6to4, and 64:ff9b::/96 NAT64 address forms, allowing an authenticated RFC 6062 T...

CVE-2026-73212

Coturn (TURN/STUN server) vulnerability CVE-2026-73212: The function good_peer_addr() in src/server/ns_turn_server.c fails to canonicalize IPv4-compatible, 6to4, and 64:ff9b::/96 NAT64 address forms via ioa_addr_in_range() in src/client/ns_turn_ioaddr.c. This can let an authenticated RFC 6062 TCP...

PT-2026-70799

Name of the Vulnerable Software and Affected Versions Coturn versions prior to 4.13.1 Description The good peer addr function in src/server/ns turn server.c utilizes ioa addr in range in src/client/ns turn ioaddr.c without canonicalizing IPv4-compatible, 6to4, and 64:ff9b::/96 NAT64 address forms...

[SECURITY] Fedora 33 Update: coturn-4.5.2-1.fc33

The Coturn TURN Server is a VoIP media traffic NAT traversal server and gat eway. It can be used as a general-purpose network traffic TURN server/gateway, to o. This implementation also includes some extra features. Supported RFCs: TURN specs: - RFC 5766 - base TURN specs - RFC 6062 - TCP relayin...

Fedora: Security Advisory for coturn (FEDORA-2021-32d0068851)

The remote host is missing an update for the Copyright C 2021 Greenbone Networks GmbH Some text descriptions might be excerpted from a referenced sources, and are Copyright C by the respective right holders. SPDX-License-Identifier: GPL-2.0-or-later This program is free software; you can...

[SECURITY] Fedora 32 Update: coturn-4.5.1.3-1.fc32

The Coturn TURN Server is a VoIP media traffic NAT traversal server and gat eway. It can be used as a general-purpose network traffic TURN server/gateway, to o. This implementation also includes some extra features. Supported RFCs: TURN specs: - RFC 5766 - base TURN specs - RFC 6062 - TCP relayin...

Fedora: Security Advisory for coturn (FEDORA-2020-305c173af8)

The remote host is missing an update for the Copyright C 2020 Greenbone Networks GmbH Some text descriptions might be excerpted from a referenced sources, and are Copyright C by the respective right holders. SPDX-License-Identifier: GPL-2.0-or-later This program is free software; you can...

Fedora: Security Advisory for coturn (FEDORA-2020-f3fcb1608a)

The remote host is missing an update for the Copyright C 2020 Greenbone Networks GmbH Some text descriptions might be excerpted from a referenced sources, and are Copyright C by the respective right holders. SPDX-License-Identifier: GPL-2.0-or-later This program is free software; you can...

[SECURITY] Fedora 32 Update: coturn-4.5.1.1-3.fc32

The Coturn TURN Server is a VoIP media traffic NAT traversal server and gat eway. It can be used as a general-purpose network traffic TURN server/gateway, to o. This implementation also includes some extra features. Supported RFCs: TURN specs: - RFC 5766 - base TURN specs - RFC 6062 - TCP relayin...