{"id":"DEBIAN-CVE-2026-93601","details":"rustls-webpki (the Rust webpki fork used by rustls) versions \u003e= 0.101.0 and prior to 0.103.12 and 0.104.0-alpha.6 incorrectly accepted permitted-subtree DNS name constraints for certificates asserting a wildcard name. For example, a name constraint of accept.example.com was treated as satisfied by a certificate for *.example.com, which could feasibly assert reject.example.com — a name outside the permitted subtree. Because name constraints are restrictions applied to otherwise properly issued certificates, the issue is only reachable after signature verification succeeds and requires a misissued wildcard certificate to exploit.","modified":"2026-09-23T09:00:22.037219983Z","published":"2026-09-18T14:19:11.707Z","upstream":["CVE-2026-93601"],"references":[{"type":"ADVISORY","url":"https://security-tracker.debian.org/tracker/CVE-2026-93601"}],"affected":[{"package":{"name":"rust-rustls-webpki","ecosystem":"Debian:13","purl":"pkg:deb/debian/rust-rustls-webpki?arch=source&distro=trixie"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["0.102.8-5","0.103.10+ds-1","0.103.13+ds-1","0.103.15+ds-1","0.103.4-1","0.103.4-2","0.103.5-1","0.103.6-1","0.103.7-1","0.103.9+ds-1","0.103.9+ds-2"],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-93601.json"}},{"package":{"name":"rust-rustls-webpki","ecosystem":"Debian:14","purl":"pkg:deb/debian/rust-rustls-webpki?arch=source&distro=forky"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0.103.13+ds-1"}]}],"versions":["0.102.8-5","0.103.10+ds-1","0.103.4-1","0.103.4-2","0.103.5-1","0.103.6-1","0.103.7-1","0.103.9+ds-1","0.103.9+ds-2"],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-93601.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V4","score":"CVSS:4.0/AV:N/AC:H/AT:P/PR:H/UI:N/VC:N/VI:L/VA:N/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"}]}