Incorrect Authorization Affecting coturn/coturn package, versions [,4.16.0)
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-19427490
- published29 Aug 2026
- disclosed13 Aug 2026
- creditUnknown
Introduced: 13 Aug 2026
CVE-2026-73213 (opens in a new tab)How to fix?
Upgrade coturn/coturn to version 4.16.0 or higher.
Overview
Affected versions of this package are vulnerable to Incorrect Authorization in the addr_less_eq function, which performs a component-wise comparison of IPv6 addresses instead of a lexicographic comparison when evaluating peer IP ranges. An attacker can bypass configured IPv6 peer restrictions by relaying to an IPv6 peer that should be denied but is incorrectly classified as allowed due to improper address comparison. This is only exploitable if the attacker is an authenticated TURN client.