CVEvulnerability

CVE-2026-53450

7.4 HIGH Published 2026-07-10 Modified 2026-07-16 Official page ↗
Status
Analyzed
Published
2026-07-10
Last modified
2026-07-16
Assigner
[email protected]
CVSS 3.1 ([email protected])
7.4 HIGH — CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:L
Weaknesses
CWE-918

Description

Coturn is a free open source implementation of TURN and STUN Server. Prior to 4.13.0, coturn rejects loopback peers by default unless allow-loopback-peers is enabled, but the default loopback guard can be bypassed by using the IPv4-mapped IPv6 peer address ::ffff:127.0.0.1 in a TURN XOR-PEER-ADDRESS attribute. ioa_addr_is_loopback checks for the literal IPv6 loopback shape before IPv4-mapped IPv6 handling, so good_peer_addr does not apply the default loopback rejection and an authenticated TURN client can expose services bound only to localhost on the coturn host through TURN relay traffic. This issue is fixed in version 4.13.0.

Affected configurations

• coturn project coturn (< 4.13.0)

Related

Weakness · CWE (1)

  • CWE-918 Server-Side Request Forgery weakness

References