{"id":"CVE-2026-119760","aliases":["DEBIAN-CVE-2026-119760","EUVD-2026-114237","GHSA-v5q9-7x5c-3phf","UBUNTU-CVE-2026-119760"],"status":"published","title":"sniproxy through 0.7.0 NULL Pointer Dereference via resolv_cancel()","description":"sniproxy through 0.7.0 contains a NULL pointer dereference vulnerability in resolv_cancel() that allows remote unauthenticated attackers to crash the daemon by sending overlong hostnames. Attackers can send a 254 or 255 character TLS SNI name or HTTP Host header matching a wildcard backend, then close the connection to terminate the proxy.","severity":{"version":"4.0","score":8.7,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N","level":"high","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-12","score":0.00477,"percentile":0.41697,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":true},"cwes":["CWE-476"],"published":"2026-10-30T17:19:53Z","modified":"2026-11-05T04:00:33Z","fixes":[{"ecosystem":"Debian:14","package":"sniproxy","fixed_in":["0.7.0-2"],"sources":["osv"]}],"affected":[{"source":"osv","ecosystem":"Debian:12","package":"sniproxy","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["0.6.0-2.1","0.6.1+git20240321-0.1","0.6.1+git20240321-0.1~bpo12+1","0.6.1+git20240321-0.2","0.7.0-1","0.7.0-2"]},{"source":"osv","ecosystem":"Debian:13","package":"sniproxy","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["0.6.1+git20240321-0.2","0.7.0-1","0.7.0-2"]},{"source":"osv","ecosystem":"Debian:14","package":"sniproxy","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0.7.0-2"}]}],"versions":["0.6.1+git20240321-0.2","0.7.0-1"]},{"source":"osv","ecosystem":"Ubuntu:Pro:18.04:LTS","package":"sniproxy","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["0.5.0-2","0.5.0-2ubuntu0.1~esm1"]},{"source":"osv","ecosystem":"Ubuntu:20.04:LTS","package":"sniproxy","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["0.6.0-1","0.6.0-1ubuntu0.1"]},{"source":"osv","ecosystem":"Ubuntu:22.04:LTS","package":"sniproxy","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["0.6.0-2","0.6.0-2ubuntu0.22.04.1"]},{"source":"osv","ecosystem":"Ubuntu:24.04:LTS","package":"sniproxy","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["0.6.0-2.1","0.6.0-2.1build1","0.6.0-2.1build2"]},{"source":"osv","ecosystem":"Ubuntu:26.10","package":"sniproxy","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["0.6.1+git20240321-0.2build1","0.7.0-1"]},{"source":"osv","ecosystem":"Ubuntu:26.04:LTS","package":"sniproxy","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["0.6.1+git20240321-0.2","0.6.1+git20240321-0.2build1"]}],"products":[{"vendor":"dlundquist","product":"sniproxy"},{"vendor":"sniproxy","product":"sniproxy"}],"references":[{"url":"https://github.com/dlundquist/sniproxy/issues/411","tags":["issue-tracking","report"]},{"url":"https://github.com/dlundquist/sniproxy/blob/1cc625ea41796695a54593d1bd779366b82b8b4e/src/connection.c#L737-L738","tags":["technical-description","article","report"]},{"url":"https://github.com/dlundquist/sniproxy/blob/1cc625ea41796695a54593d1bd779366b82b8b4e/src/resolv.c#L219-L224","tags":["technical-description","article","report"]},{"url":"https://github.com/renaudallard/sniproxy/commit/d5d78290c8fe15d9aa12185d2c57739b7b0c6a6b","tags":["patch","fix","report"]},{"url":"https://github.com/renaudallard/sniproxy/commit/17986ba7397297313331297cac3b9eb3f0ba96b7","tags":["patch","fix","report"]},{"url":"https://github.com/dlundquist/sniproxy","tags":["product","package","report"]},{"url":"https://www.vulncheck.com/advisories/sniproxy-through-0.7.0-null-pointer-dereference-via-resolv-cancel","tags":["third-party-advisory","advisory","report"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-119760","tags":["advisory"]},{"url":"https://github.com/advisories/GHSA-v5q9-7x5c-3phf"},{"url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/119xxx/CVE-2026-119760.json","tags":["advisory"]},{"url":"https://security-tracker.debian.org/tracker/CVE-2026-119760","tags":["advisory"]},{"url":"https://ubuntu.com/security/CVE-2026-119760","tags":["report"]},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-119760","tags":["report"]}],"sources":{"cve":[{"id":"CVE-2026-119760","title":"sniproxy through 0.7.0 NULL Pointer Dereference via resolv_cancel()","description":"sniproxy through 0.7.0 contains a NULL pointer dereference vulnerability in resolv_cancel() that allows remote unauthenticated attackers to crash the daemon by sending overlong hostnames. Attackers can send a 254 or 255 character TLS SNI name or HTTP Host header matching a wildcard backend, then close the connection to terminate the proxy.","status":"published","published":"2026-10-30T17:19:53.212Z","modified":"2026-11-05T02:25:58.7Z","cvss":[{"version":"4.0","score":8.7,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N","level":"high","assessor":"cna"},{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high","assessor":"cna"}],"cwes":["CWE-476"],"updated_at":"2026-11-05T06:56:15.67765Z"}],"euvd":[{"id":"EUVD-2026-114237","description":"sniproxy through 0.7.0 contains a NULL pointer dereference vulnerability in resolv_cancel() that allows remote unauthenticated attackers to crash the daemon by sending overlong hostnames. Attackers can send a 254 or 255 character TLS SNI name or HTTP Host header matching a wildcard backend, then close the connection to terminate the proxy.","status":"published","published":"2026-10-30T17:19:53Z","modified":"2026-11-05T02:25:58Z","cvss":[{"version":"4.0","score":8.7,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N","level":"high"}],"updated_at":"2026-11-05T06:54:34.509968Z"}],"ghsa":[{"id":"GHSA-v5q9-7x5c-3phf","title":"sniproxy through 0.7.0 contains a NULL pointer dereference vulnerability in resolv_cancel() that...","description":"sniproxy through 0.7.0 contains a NULL pointer dereference vulnerability in resolv_cancel() that allows remote unauthenticated attackers to crash the daemon by sending overlong hostnames. Attackers can send a 254 or 255 character TLS SNI name or HTTP Host header matching a wildcard backend, then close the connection to terminate the proxy.","status":"published","published":"2026-10-30T18:32:44Z","modified":"2026-10-30T18:32:45Z","cvss":[{"version":"4.0","score":8.7,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/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":"high"},{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high"}],"cwes":["CWE-476"],"updated_at":"2026-11-02T15:14:51.443103Z"}],"nvd":[{"id":"CVE-2026-119760","description":"sniproxy through 0.7.0 contains a NULL pointer dereference vulnerability in resolv_cancel() that allows remote unauthenticated attackers to crash the daemon by sending overlong hostnames. Attackers can send a 254 or 255 character TLS SNI name or HTTP Host header matching a wildcard backend, then close the connection to terminate the proxy.","status":"published","published":"2026-10-30T18:17:26.65Z","modified":"2026-11-05T03:17:20.457Z","cvss":[{"version":"4.0","score":8.7,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/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":"high","assessor":"secondary"},{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high","assessor":"secondary"}],"cwes":["CWE-476"],"updated_at":"2026-11-05T06:56:49.198795Z"}],"osv":[{"id":"CVE-2026-119760","title":"sniproxy through 0.7.0 NULL Pointer Dereference via resolv_cancel()","description":"sniproxy through 0.7.0 contains a NULL pointer dereference vulnerability in resolv_cancel() that allows remote unauthenticated attackers to crash the daemon by sending overlong hostnames. 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Attackers can send a 254 or 255 character TLS SNI name or HTTP Host header matching a wildcard backend, then close the connection to terminate the proxy.","status":"published","published":"2026-10-30T18:17:26.65Z","modified":"2026-11-05T10:00:43.495230146Z","cvss":[{"version":"4.0","score":8.7,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/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":"high"}],"updated_at":"2026-11-05T13:31:24.64316Z"},{"id":"UBUNTU-CVE-2026-119760","description":"sniproxy through 0.7.0 contains a NULL pointer dereference vulnerability in resolv_cancel() that allows remote unauthenticated attackers to crash the daemon by sending overlong hostnames. Attackers can send a 254 or 255 character TLS SNI name or HTTP Host header matching a wildcard backend, then close the connection to terminate the proxy.","status":"published","published":"2026-10-30T18:17:00Z","modified":"2026-11-05T04:42:52Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high"},{"version":"4.0","score":8.7,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N","level":"high"}],"updated_at":"2026-11-05T13:33:25.727744Z"}]}}