{"id":"GHSA-xgp8-3hg3-c2mh","aliases":["CVE-2026-93601","RUSTSEC-2026-0099"],"url":"https://o3.security/vulnerability/GHSA-xgp8-3hg3-c2mh","summary":"webpki: Name constraints were accepted for certificates asserting a wildcard name","details":"Permitted subtree name constraints for DNS names were accepted for certificates asserting a wildcard name.\n\nThis was incorrect because, given a name constraint of `accept.example.com`, `*.example.com` could feasibly allow a name of `reject.example.com` which is outside the constraint.\nThis is very similar to [CVE-2025-61727](https://go.dev/issue/76442).\n\nSince name constraints are restrictions on otherwise properly-issued certificates, this bug is reachable only after signature verification and requires misissuance to exploit.","published":"2026-04-16T21:17:12Z","modified":"2026-09-19T03:55:49.146112754Z","cvss":{"score":2.2,"severity":"LOW","vector":"CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:N/I:L/A:N"},"epss":null,"cisaKev":null,"exploitsKnown":null,"affectedPackages":[{"ecosystem":"crates.io","name":"rustls-webpki","fixedVersion":"0.103.12"},{"ecosystem":"crates.io","name":"rustls-webpki","fixedVersion":"0.104.0-alpha.6"}],"fix":null,"references":[{"type":"WEB","url":"https://github.com/rustls/webpki/security/advisories/GHSA-xgp8-3hg3-c2mh"},{"type":"PACKAGE","url":"https://github.com/rustls/webpki"},{"type":"WEB","url":"https://rustsec.org/advisories/RUSTSEC-2026-0099.html"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-09-19T03:55:49.146112754Z"}}