CVSS 4.0
2.1 lowCVSS:4.0/AV:N/AC:H/AT:P/PR:H/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:NCVE-2026-93600
Low (2.1). EPSS 0.2% chance of exploitation in the next 30 days. Fixed in rustls-webpki 0.103.12, 0.104.0-alpha.6.
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.
Severity
CVSS 3.1
2.2 lowCVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:N/I:L/A:N- EPSS
- 0.2% chance of exploitation in the next 30 days; higher than 10% of CVEs (scores of 2026-10-31)
- CWE
- CWE-295
- Published
- Modified
- Record from
- the NVD, synced
Packages (OSV)
| Advisory | Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|---|
| GHSA-965h-392x-2mh5 | crates.io | rustls-webpki | >=0.101.0 <0.103.12 | 0.103.12 |
| GHSA-965h-392x-2mh5 | crates.io | rustls-webpki | >=0.104.0-alpha.1 <0.104.0-alpha.6 | 0.104.0-alpha.6 |
| RUSTSEC-2026-0098 | crates.io | rustls-webpki | >=0.0.0-0 <0.103.12 >=0.104.0-alpha.1 <0.104.0-alpha.6 | 0.103.12, 0.104.0-alpha.6 |