{"id":"CVE-2026-88648","aliases":["AZL-107436","BELL-CVE-2026-88648","DEBIAN-CVE-2026-88648","EUVD-2026-95205","GHSA-gxj4-87qm-hmc3","UBUNTU-CVE-2026-88648"],"status":"disputed","title":"Incomplete X.509 implementation in GnuTLS v3.8.13 allows attackers controlling a subordinate...","description":"In GnuTLS v3.8.13, an excluded msUPN/SRV otherName is never checked. NOTE: the Supplier does not consider this an actionable security vulnerability because of its \"threat model doesn't consider attacks only possible by modifying anything within the trust boundary (private keys, trusted certificate authorities and their issued certificates including intermediate CAs, etc.)\" policy.","severity":{"version":"3.1","score":3.7,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N","level":"low","assessor":"adp","from":"cve"},"epss":{"day":"2026-11-11","score":0.00202,"percentile":0.10308,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-295"],"published":"2026-10-08T00:00:00Z","modified":"2026-11-04T04:53:17Z","affected":[{"source":"osv","ecosystem":"Azure Linux:3","package":"gnutls","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"last_affected":"3.8.13-1"}]}]},{"source":"osv","ecosystem":"Debian:12","package":"gnutls28","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["3.7.9-2","3.7.9-2+deb12u1","3.7.9-2+deb12u2","3.7.9-2+deb12u3","3.7.9-2+deb12u4","3.7.9-2+deb12u5","3.7.9-2+deb12u6","3.7.9-2+deb12u7","3.7.9-2+loong64","3.8.0+git20230413-1","3.8.0+git20230529-1","3.8.0+git20230713-1","3.8.1-1","3.8.1-2","3.8.1-3","3.8.1-4","3.8.10-1","3.8.10-2","3.8.10-3","3.8.11-1","3.8.11-2","3.8.11-3","3.8.12-1","3.8.12-2","3.8.12-3","3.8.12-4","3.8.13-1","3.8.2-1","3.8.3-1","3.8.3-1.1","3.8.3-1.1~exp1","3.8.4-1","3.8.4-2","3.8.5-1","3.8.5-2","3.8.5-3","3.8.5-4","3.8.6-1","3.8.6-2","3.8.7.1-1","3.8.8-1","3.8.8-2","3.8.9-1","3.8.9-2","3.8.9-3"]},{"source":"osv","ecosystem":"Debian:13","package":"gnutls28","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["3.8.10-1","3.8.10-2","3.8.10-3","3.8.11-1","3.8.11-2","3.8.11-3","3.8.12-1","3.8.12-2","3.8.12-3","3.8.12-4","3.8.13-1","3.8.9-3","3.8.9-3+deb13u1","3.8.9-3+deb13u2","3.8.9-3+deb13u3","3.8.9-3+deb13u4"]},{"source":"osv","ecosystem":"Debian:14","package":"gnutls28","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["3.8.10-1","3.8.10-2","3.8.10-3","3.8.11-1","3.8.11-2","3.8.11-3","3.8.12-1","3.8.12-2","3.8.12-3","3.8.12-4","3.8.13-1","3.8.9-3"]},{"source":"osv","ecosystem":"Ubuntu:Pro:14.04:LTS","package":"gnutls26","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["2.12.23-1ubuntu4","2.12.23-1ubuntu5","2.12.23-12ubuntu1","2.12.23-12ubuntu2","2.12.23-12ubuntu2.1","2.12.23-12ubuntu2.2","2.12.23-12ubuntu2.3","2.12.23-12ubuntu2.4","2.12.23-12ubuntu2.5","2.12.23-12ubuntu2.6","2.12.23-12ubuntu2.7","2.12.23-12ubuntu2.8","2.12.23-12ubuntu2.10+esm1"]},{"source":"osv","ecosystem":"Ubuntu:Pro:16.04:LTS","package":"gnutls28","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["3.3.15-5ubuntu2","3.3.18-1ubuntu1","3.3.20-1ubuntu1","3.4.9-2ubuntu1","3.4.10-4ubuntu1","3.4.10-4ubuntu1.1","3.4.10-4ubuntu1.2","3.4.10-4ubuntu1.3","3.4.10-4ubuntu1.4","3.4.10-4ubuntu1.5","3.4.10-4ubuntu1.6","3.4.10-4ubuntu1.7","3.4.10-4ubuntu1.8","3.4.10-4ubuntu1.9","3.4.10-4ubuntu1.9+esm1","3.4.10-4ubuntu1.9+esm2","3.4.10-4ubuntu1.9+esm3","3.4.10-4ubuntu1.9+esm4"]},{"source":"osv","ecosystem":"Ubuntu:Pro:18.04:LTS","package":"gnutls28","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["3.5.8-6ubuntu3","3.5.17-1ubuntu1","3.5.17-1ubuntu3","3.5.18-1ubuntu1","3.5.18-1ubuntu1.1","3.5.18-1ubuntu1.2","3.5.18-1ubuntu1.3","3.5.18-1ubuntu1.4","3.5.18-1ubuntu1.5","3.5.18-1ubuntu1.6","3.5.18-1ubuntu1.6+esm1","3.5.18-1ubuntu1.6+esm2","3.5.18-1ubuntu1.6+esm3","3.5.18-1ubuntu1.6+esm4"]},{"source":"osv","ecosystem":"Ubuntu:Pro:20.04:LTS","package":"gnutls28","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["3.6.9-5ubuntu1","3.6.9-5ubuntu2","3.6.10-5","3.6.11.1-2","3.6.11.1-2ubuntu2","3.6.13-2ubuntu1","3.6.13-2ubuntu1.1","3.6.13-2ubuntu1.2","3.6.13-2ubuntu1.3","3.6.13-2ubuntu1.6","3.6.13-2ubuntu1.7","3.6.13-2ubuntu1.8","3.6.13-2ubuntu1.9","3.6.13-2ubuntu1.10","3.6.13-2ubuntu1.11","3.6.13-2ubuntu1.12","3.6.13-2ubuntu1.12+esm1","3.6.13-2ubuntu1.12+esm2","3.6.13-2ubuntu1.12+esm3"]},{"source":"osv","ecosystem":"Ubuntu:22.04:LTS","package":"gnutls28","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["3.7.1-5ubuntu1","3.7.2-2ubuntu1","3.7.2-4ubuntu1","3.7.2-5ubuntu1","3.7.3-4ubuntu1","3.7.3-4ubuntu1.1","3.7.3-4ubuntu1.2","3.7.3-4ubuntu1.3","3.7.3-4ubuntu1.4","3.7.3-4ubuntu1.5","3.7.3-4ubuntu1.6","3.7.3-4ubuntu1.7","3.7.3-4ubuntu1.8","3.7.3-4ubuntu1.9"]},{"source":"osv","ecosystem":"Ubuntu:Pro:FIPS-preview:22.04:LTS","package":"gnutls28","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["3.7.3-4ubuntu1.2+Fips1.1"]},{"source":"osv","ecosystem":"Ubuntu:Pro:FIPS-updates:22.04:LTS","package":"gnutls28","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["3.7.3-4ubuntu1.2+Fips1.1","3.7.3-4ubuntu1.3+Fips1.1","3.7.3-4ubuntu1.4+Fips1","3.7.3-4ubuntu1.5+Fips1","3.7.3-4ubuntu1.6+Fips1","3.7.3-4ubuntu1.7+Fips1","3.7.3-4ubuntu1.7+Fips1.1","3.7.3-4ubuntu1.8+Fips1.1","3.7.3-4ubuntu1.9+Fips1"]},{"source":"osv","ecosystem":"Ubuntu:24.04:LTS","package":"gnutls28","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["3.8.1-4ubuntu1","3.8.1-4ubuntu6","3.8.1-4ubuntu7","3.8.3-1ubuntu1","3.8.3-1.1ubuntu2","3.8.3-1.1ubuntu3","3.8.3-1.1ubuntu3.1","3.8.3-1.1ubuntu3.2","3.8.3-1.1ubuntu3.3","3.8.3-1.1ubuntu3.4","3.8.3-1.1ubuntu3.5","3.8.3-1.1ubuntu3.6"]},{"source":"osv","ecosystem":"Ubuntu:Pro:FIPS-updates:24.04:LTS","package":"gnutls28","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["3.8.3-1.1ubuntu3.1+Fips1","3.8.3-1.1ubuntu3.4+Fips1","3.8.3-1.1ubuntu3.4+Fips1.1","3.8.3-1.1ubuntu3.5+Fips1.1","3.8.3-1.1ubuntu3.6+Fip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GnuTLS v3.8.13, an excluded msUPN/SRV otherName is never checked. NOTE: the Supplier does not consider this an actionable security vulnerability because of its \"threat model doesn't consider attacks only possible by modifying anything within the trust boundary (private keys, trusted certificate authorities and their issued certificates including intermediate CAs, etc.)\" policy.","status":"disputed","published":"2026-10-08T00:00:00Z","modified":"2026-11-04T04:53:17.731Z","cvss":[{"version":"3.1","score":3.7,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N","level":"low","assessor":"adp"}],"cwes":["CWE-295"],"updated_at":"2026-11-04T05:21:48.223566Z"}],"euvd":[{"id":"EUVD-2026-95205","description":"In GnuTLS v3.8.13, an excluded msUPN/SRV otherName is never checked. NOTE: the Supplier does not consider this an actionable security vulnerability because of its \"threat model doesn't consider attacks only possible by modifying anything within the trust boundary (private keys, trusted certificate authorities and their issued certificates including intermediate CAs, etc.)\" policy.","status":"published","published":"2026-10-08T00:00:00Z","modified":"2026-11-04T04:53:17Z","cvss":[{"version":"3.1","score":3.7,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N","level":"low"}],"updated_at":"2026-11-04T07:00:57.274021Z"}],"ghsa":[{"id":"GHSA-gxj4-87qm-hmc3","title":"Incomplete X.509 implementation in GnuTLS v3.8.13 allows attackers controlling a subordinate...","description":"Incomplete X.509 implementation in GnuTLS v3.8.13 allows attackers controlling a subordinate Certificate Authority to bypass cross-domain PKI restrictions and issue unauthorized certificates.","status":"published","published":"2026-10-08T21:33:25Z","modified":"2026-11-04T06:32:53Z","cvss":[{"version":"3.1","score":3.7,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N","level":"low"}],"cwes":["CWE-295"],"updated_at":"2026-11-04T06:56:58.885599Z"}],"nvd":[{"id":"CVE-2026-88648","description":"In GnuTLS v3.8.13, an excluded msUPN/SRV otherName is never checked. NOTE: the Supplier does not consider this an actionable security vulnerability because of its \"threat model doesn't consider attacks only possible by modifying anything within the trust boundary (private keys, trusted certificate authorities and their issued certificates including intermediate CAs, etc.)\" policy.","status":"disputed","published":"2026-10-08T19:20:52.703Z","modified":"2026-11-04T05:19:05.203Z","cvss":[{"version":"3.1","score":3.7,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N","level":"low","assessor":"secondary"}],"cwes":["CWE-295"],"updated_at":"2026-11-04T06:53:24.125861Z"}],"osv":[{"id":"BELL-CVE-2026-88648","title":"CVE-2026-88648 does not affect BellSoft software","status":"withdrawn","published":"2026-10-09T06:05:30.193937Z","modified":"2026-10-28T07:15:03.557102907Z","cvss":[{"version":"3.1","score":3.7,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N","level":"low"}],"updated_at":"2026-11-02T15:28:26.630331Z"},{"id":"DEBIAN-CVE-2026-88648","description":"In GnuTLS v3.8.13, an excluded msUPN/SRV otherName is never checked. NOTE: the Supplier does not consider this an actionable security vulnerability because of its \"threat model doesn't consider attacks only possible by modifying anything within the trust boundary (private keys, trusted certificate authorities and their issued certificates including intermediate CAs, etc.)\" policy.","status":"published","published":"2026-10-08T19:20:52.703Z","modified":"2026-11-05T05:00:28.656711884Z","cvss":[{"version":"3.1","score":3.7,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N","level":"low"}],"updated_at":"2026-11-05T07:10:31.343344Z"},{"id":"UBUNTU-CVE-2026-88648","description":"In GnuTLS v3.8.13, an excluded msUPN/SRV otherName is never checked. NOTE: the Supplier does not consider this an actionable security vulnerability because of its \"threat model doesn't consider attacks only possible by modifying anything within the trust boundary (private keys, trusted certificate authorities and their issued certificates including intermediate CAs, etc.)\" policy.","status":"published","published":"2026-10-08T19:20:00Z","modified":"2026-11-05T11:47:38.468595113Z","cvss":[{"version":"3.1","score":3.7,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N","level":"low"}],"updated_at":"2026-11-05T13:30:00.949926Z"},{"id":"AZL-107436","title":"CVE-2026-88648 affecting package gnutls 3.8.13-1","description":"In GnuTLS v3.8.13, an excluded msUPN/SRV otherName is never checked. NOTE: the Supplier does not consider this an actionable security vulnerability because of its \"threat model doesn't consider attacks only possible by modifying anything within the trust boundary (private keys, trusted certificate authorities and their issued certificates including intermediate CAs, etc.)\" policy.","status":"published","published":"2026-10-08T19:20:52Z","modified":"2026-11-05T05:40:51Z","updated_at":"2026-11-05T16:41:17.969374Z"}]}}