- Reported
-
- Issued
-
- Package
-
rustls-webpki
(crates.io)
- Type
-
Vulnerability
- Keywords
-
#name-constraints
#x509
- Aliases
-
- Patched
-
>=0.103.12, <0.104.0-alpha.1>=0.104.0-alpha.6
Description
Permitted subtree name constraints for DNS names were accepted for certificates asserting a wildcard name.
This 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.
This is very similar to CVE-2025-61727.
Since name constraints are restrictions on otherwise properly-issued certificates, this bug is reachable only after signature verification and requires misissuance to exploit.
This vulnerability is identified as GHSA-xgp8-3hg3-c2mh. Thank you to @1seal for the report.
Advisory available under CC0-1.0
license.