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CVE-2026-93600

rustls webpki Name Constraints URI Validation Bypass PUBLISHED

Description (CNA)

rustls-webpki (rustls/webpki) versions 0.101.0 through 0.103.11 and 0.104.0-alpha releases before 0.104.0-alpha.6 ignore X.509 name constraints that apply to URI names, causing such constraints to be accepted rather than enforced. Because name constraints are restrictions on otherwise properly issued certificates, the flaw is only reachable after successful signature verification and requires a misissued certificate to exploit; the library also provides no API for asserting URI names, and URI name constraints are otherwise unimplemented. Versions 0.103.12 and 0.104.0-alpha.6 reject URI name constraints unconditionally.

Affected (CNA)

Vendor / productVersions
rustls / webpkiaffected 0.101.0 before 0.103.12; affected 0.104.0-alpha.1 before 0.104.0-alpha.6

CWE

CWE-295

References

ADP enrichment

CISA-ADP

No English description supplied.

No references supplied.