{"id":"CVE-2026-114641","aliases":["EUVD-2026-107896","GHSA-mhjw-hmjv-p99x","GHSA-q9pf-jh7g-83mc","openSUSE-SU-2026:12281-1"],"status":"published","title":"Traefik before 2.11.58 and 3.7.14 Race Condition in NTLM/Kerberos Round Tripper","description":"Traefik 2.11.x before 2.11.58 and 3.x before 3.7.14 contains a race condition in NTLM and Kerberos (Negotiate) backend authentication, where the per-connection sticky round tripper slot is read and written without synchronization. Remote attackers can send concurrent HTTP/2 or HTTP/3 requests over one connection to orphan backend connections, break connection-bound authentication, or crash Traefik.","severity":{"version":"4.0","score":6.3,"vector":"CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N","level":"medium","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-12","score":0.00256,"percentile":0.17423,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-362"],"published":"2026-10-22T01:43:40Z","modified":"2026-10-30T02:30:34Z","affected":[{"source":"osv","ecosystem":"openSUSE:Tumbleweed","package":"traefik","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"3.7.16-1.1"}]}],"bundled":9}],"products":[{"vendor":"traefik","product":"traefik"}],"references":[{"url":"https://github.com/traefik/traefik/security/advisories/GHSA-mhjw-hmjv-p99x","tags":["vendor-advisory","Vendor Advisory","advisory"]},{"url":"https://www.vulncheck.com/advisories/traefik-before-2.11.58-and-3.7.14-race-condition-in-ntlm-kerberos-round-tripper","tags":["third-party-advisory","Third Party Advisory","advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-114641","tags":["advisory"]},{"url":"https://github.com/advisories/GHSA-q9pf-jh7g-83mc"},{"url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/114xxx/CVE-2026-114641.json","tags":["advisory"]},{"url":"","tags":["advisory"]},{"url":"https://www.suse.com/security/cve/CVE-2026-114635","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2026-114636","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2026-114637","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2026-114638","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2026-114639","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2026-114640","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2026-114641","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2026-114642","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2026-114656","tags":["web"]}],"sources":{"cve":[{"id":"CVE-2026-114641","title":"Traefik before 2.11.58 and 3.7.14 Race Condition in NTLM/Kerberos Round Tripper","description":"Traefik 2.11.x before 2.11.58 and 3.x before 3.7.14 contains a race condition in NTLM and Kerberos (Negotiate) backend authentication, where the per-connection sticky round tripper slot is read and written without synchronization. Remote attackers can send concurrent HTTP/2 or HTTP/3 requests over one connection to orphan backend connections, break connection-bound authentication, or crash Traefik.","status":"published","published":"2026-10-22T01:43:40.663Z","modified":"2026-10-28T18:58:55.522Z","cvss":[{"version":"4.0","score":6.3,"vector":"CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N","level":"medium","assessor":"cna"},{"version":"3.1","score":3.7,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L","level":"low","assessor":"cna"}],"cwes":["CWE-362"],"updated_at":"2026-11-02T13:40:01.309549Z"}],"euvd":[{"id":"EUVD-2026-107896","description":"Traefik 2.11.x before 2.11.58 and 3.x before 3.7.14 contains a race condition in NTLM and Kerberos (Negotiate) backend authentication, where the per-connection sticky round tripper slot is read and written without synchronization. Remote attackers can send concurrent HTTP/2 or HTTP/3 requests over one connection to orphan backend connections, break connection-bound authentication, or crash Traefik.","status":"published","published":"2026-10-22T01:43:40Z","modified":"2026-10-28T18:58:55Z","cvss":[{"version":"4.0","score":6.3,"vector":"CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N","level":"medium"}],"updated_at":"2026-11-02T16:59:19.203779Z"}],"ghsa":[{"id":"GHSA-q9pf-jh7g-83mc","title":"Traefik 2.11.x before 2.11.58 and 3.x before 3.7.14 contains a race condition in NTLM and...","description":"Traefik 2.11.x before 2.11.58 and 3.x before 3.7.14 contains a race condition in NTLM and Kerberos (Negotiate) backend authentication, where the per-connection sticky round tripper slot is read and written without synchronization. Remote attackers can send concurrent HTTP/2 or HTTP/3 requests over one connection to orphan backend connections, break connection-bound authentication, or crash Traefik.","status":"published","published":"2026-10-22T03:33:34Z","modified":"2026-10-22T03:33:42Z","cvss":[{"version":"4.0","score":6.3,"vector":"CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X","level":"medium"},{"version":"3.1","score":3.7,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L","level":"low"}],"cwes":["CWE-362"],"updated_at":"2026-11-02T15:14:14.973906Z"}],"nvd":[{"id":"CVE-2026-114641","description":"Traefik 2.11.x before 2.11.58 and 3.x before 3.7.14 contains a race condition in NTLM and Kerberos (Negotiate) backend authentication, where the per-connection sticky round tripper slot is read and written without synchronization. Remote attackers can send concurrent HTTP/2 or HTTP/3 requests over one connection to orphan backend connections, break connection-bound authentication, or crash Traefik.","status":"published","published":"2026-10-22T02:16:57.093Z","modified":"2026-10-28T19:17:28.607Z","cvss":[{"version":"4.0","score":6.3,"vector":"CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X","level":"medium","assessor":"secondary"},{"version":"3.1","score":3.7,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L","level":"low","assessor":"secondary"}],"cwes":["CWE-362"],"updated_at":"2026-11-02T14:13:02.371082Z"}],"osv":[{"id":"CVE-2026-114641","title":"Traefik before 2.11.58 and 3.7.14 Race Condition in NTLM/Kerberos Round Tripper","description":"Traefik 2.11.x before 2.11.58 and 3.x before 3.7.14 contains a race condition in NTLM and Kerberos (Negotiate) backend authentication, where the per-connection sticky round tripper slot is read and written without synchronization. Remote attackers can send concurrent HTTP/2 or HTTP/3 requests over one connection to orphan backend connections, break connection-bound authentication, or crash Traefik.","status":"published","published":"2026-10-22T01:43:40.663Z","modified":"2026-10-30T02:30:34.814485268Z","cvss":[{"version":"4.0","score":6.3,"vector":"CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N","level":"medium"}],"cwes":["CWE-362"],"updated_at":"2026-11-02T15:44:56.310988Z"},{"id":"openSUSE-SU-2026:12281-1","title":"traefik-3.7.16-1.1 on GA media","description":"These are all security issues fixed in the traefik-3.7.16-1.1 package on the GA media of openSUSE Tumbleweed.","status":"published","published":"2026-10-26T00:00:00Z","modified":"2026-10-27T17:23:18.007060995Z","updated_at":"2026-11-02T16:58:40.245664Z"}]}}