{"id":"CVE-2026-104074","aliases":[],"title":"Coturn 4.10.0 Uninitialized Stack Memory Disclosure via ERROR-CODE","titleSource":"VulnCheck","descriptionSource":"VulnCheck","products":[{"vendor":"coturn","name":"coturn","platforms":[],"versions":[{"version":"4.10.0","status":"affected","lessThan":"4.11.0","versionType":"semver"}],"defaultStatus":"unaffected","source":"VulnCheck","url":"https://www.cve.org/CVERecord?id=CVE-2026-104074"}],"remediation":[],"description":"Coturn 4.10.0 contains an uninitialized memory disclosure vulnerability that allows remote unauthenticated attackers to leak stack memory contents by sending a TURN Allocate request without credentials. Attackers can exploit the stun_init_error_response_common_str() function in src/client/ns_turn_msg.c, which fails to zero-initialize the avalue buffer before computing its length with strlen() and copying leaked stack bytes into the ERROR-CODE reason phrase, exposing pointer fragments that weaken ASLR and enable precise version fingerprinting.","severity":"medium","score":6.9,"published":"2026-10-07T14:29:45.615Z","modified":"2026-10-27T01:30:33.120Z","withdrawn":false,"knownExploited":false,"affected":[],"references":["https://github.com/coturn/coturn/releases/tag/4.11.0","https://github.com/coturn/coturn/pull/1878","https://github.com/coturn/coturn/commit/741b2983cc52f967dd08c438fd72a5f08f13ca27"],"sources":[{"name":"CVE","id":"CVE-2026-104074","modified":"2026-10-27T01:30:33.120Z","url":"https://www.cve.org/CVERecord?id=CVE-2026-104074"}],"assessments":[{"source":"VulnCheck","vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N","score":6.9},{"source":"VulnCheck","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N","score":5.3}],"sourceAffected":[],"kev":{"status":"not-listed","checkedAt":"2026-10-28T21:40:30.742Z"},"coverage":[{"source":"NVD","status":"not-checked"},{"source":"GHSA","status":"not-checked"},{"source":"EUVD","status":"not-checked"},{"source":"EPSS","status":"not-checked"}],"evidence":[]}