Access Control Bypass Affecting coturn/coturn package, versions [,4.13.1)
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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Start learning- Snyk IDSNYK-UNMANAGED-COTURNCOTURN-19427487
- published29 Aug 2026
- disclosed11 Aug 2026
- creditUnknown
Introduced: 11 Aug 2026
CVE-2026-73212 (opens in a new tab)How to fix?
Upgrade coturn/coturn to version 4.13.1 or higher.
Overview
Affected versions of this package are vulnerable to Access Control Bypass via improper canonicalization of peer IP addresses in the good_peer_addr function. An attacker can gain unauthorized access to internal network resources and potentially achieve remote code execution by bypassing access control lists through specially crafted IPv4-compatible, 6to4, or NAT64 addresses when using the RFC 6062 TCP CONNECT relay path. This is only exploitable if the host has a translation route that allows such address forms to reach internal networks.