Use of Externally-Controlled Format String Affecting coturn/coturn package, versions [,4.13.0)
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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- published29 Aug 2026
- disclosed19 Aug 2026
- creditUnknown
Introduced: 19 Aug 2026
CVE-2026-68553 (opens in a new tab)How to fix?
Upgrade coturn/coturn to version 4.13.0 or higher.
Overview
Affected versions of this package are vulnerable to Use of Externally-Controlled Format String via the send_message_to_redis process. An attacker can cause the server process to crash or disclose stack memory into Redis by injecting printf-style format specifiers into the TURN USERNAME or REALM attribute, which are then embedded into Redis keys and passed unsafely as format arguments.