EUVD-2026-63078

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 HMA...

CVE-2026-68554 Coturn: STUN attributes after MESSAGE-INTEGRITY are processed, letting on-path attackers modify authenticated TURN requests

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 HMA...

CVE-2026-68554

Coturn (open-source TURN/STUN server) prior to 4.15.0 is vulnerable to an on-path STUN message truncation attack. The root cause is that the server-side parser in src/server/ns_turn_server.c continues processing attributes after the MESSAGE-INTEGRITY field. Since the HMAC covers only the message ...

CVE-2026-68554

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 HMA...

CVE-2026-68553

Coturn (open-source TURN/STUN server) prior to 4.13.0 is affected by a format string vulnerability in its Redis integration. An authenticated TURN user can inject printf-style format specifiers into the STUN USERNAME or REALM attribute. These values pass is_secure_string() validation and are embe...

CVE-2026-68553 Coturn: Format String Injection via TURN USERNAME/REALM into hiredis Redis Command

Coturn is a free open source implementation of TURN and STUN Server. Prior to 4.13.0, an authenticated TURN user can place printf-style format specifiers in the STUN USERNAME or REALM attribute, which passes issecurestring validation and is embedded into Redis keys at nine call sites in...

EUVD-2026-63077

Coturn is a free open source implementation of TURN and STUN Server. Prior to 4.13.0, an authenticated TURN user can place printf-style format specifiers in the STUN USERNAME or REALM attribute, which passes issecurestring validation and is embedded into Redis keys at nine call sites in...

CVE-2026-68553 Coturn: Format String Injection via TURN USERNAME/REALM into hiredis Redis Command

Coturn is a free open source implementation of TURN and STUN Server. Prior to 4.13.0, an authenticated TURN user can place printf-style format specifiers in the STUN USERNAME or REALM attribute, which passes issecurestring validation and is embedded into Redis keys at nine call sites in...

CVE-2026-68553

Coturn is a free open source implementation of TURN and STUN Server. Prior to 4.13.0, an authenticated TURN user can place printf-style format specifiers in the STUN USERNAME or REALM attribute, which passes issecurestring validation and is embedded into Redis keys at nine call sites in...

PT-2026-78697

Name of the Vulnerable Software and Affected Versions Coturn versions prior to 4.15.0 Description An unauthenticated remote client can send a STUN message over TCP or TLS with a body-length field between 65520 and 65532. This causes the len variable in the stun get message len str function to wra...

PT-2026-78699

Name of the Vulnerable Software and Affected Versions Coturn versions prior to 4.15.0 Description An on-path attacker can modify authenticated STUN requests sent over plain UDP or TCP by appending attributes after the MESSAGE-INTEGRITY attribute and adjusting the STUN header length. Because the...

PT-2026-78700

Name of the Vulnerable Software and Affected Versions Coturn version 4.15.0 Description An authenticated TURN user can repeatedly resume a single allocation from new UDP 5-tuples without completing a handoff when the server has the --mobility feature enabled. This occurs because the mobile begin...

[SECURITY] Fedora 44 Update: coturn-4.17.2-1.fc44

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

[SECURITY] Fedora 43 Update: coturn-4.17.2-1.fc43

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

Fedora 44 : coturn (2026-50c75def83)

The remote Fedora 44 host has a package installed that is affected by multiple vulnerabilities as referenced in the FEDORA-2026-50c75def83 advisory. Coturn 4.17.2 What's Changed Fix outgoing UDP TTL pinned to 1 on client-facing sockets Coturn 4.17.1 Gate merges on the more tests suites build: Dro...

Fedora 43 : coturn (2026-13e2cf6827)

The remote Fedora 43 host has a package installed that is affected by multiple vulnerabilities as referenced in the FEDORA-2026-13e2cf6827 advisory. Coturn 4.17.2 What's Changed Fix outgoing UDP TTL pinned to 1 on client-facing sockets Coturn 4.17.1 Gate merges on the more tests suites build: Dro...

CVE-2026-73213

A flaw was found in Coturn. An authenticated TURN client can bypass configured IP address restrictions due to an incorrect component-wise IPv6 comparison in the addrlesseq function. This allows the client to relay traffic to an IPv6 peer that should be denied, leading to a Server-Side Request...

SUSE CVE-2026-73215

Coturn is a free open source implementation of TURN and STUN Server. Prior to 4.17.0, turnportsallocateeven in src/apps/relay/turnports.c marks the unused odd sibling port as TPSTAKENODD for an EVEN-PORT Allocate request with reservation bit R=0 even though no RTCP socket will release it, allowin...

CVE-2026-73216

A flaw was found in coturn. An authenticated client can exploit a vulnerability in the shutdownclientconnection function, which prematurely releases bandwidth accounting during the first stage of closing a mobility-enabled allocation. This allows the client to bypass user and total quotas, leadin...

CVE-2026-73215

A flaw was found in Coturn. An authenticated client can exploit a vulnerability by sending a specially crafted 'EVEN-PORT Allocate request' with a reservation bit set to zero. This causes the server to incorrectly mark an unused port as taken, leading to the permanent exhaustion of the relay port...