rustls webpki Name Constraints URI Validation Bypass
CVE-2026-93600 is fixed in 7 products on 1 platform, first by DEBIAN-CVE-2026-93600, released September 19, 2026. It is not reported as exploited. Patch Radar priority: Routine.
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.
Where it's fixed
| Product | Fixed in | Fix | Released |
|---|---|---|---|
| Linux | |||
| aws-nitro-enclaves-cli · opensuse-leap 16.0 | 1.5.2~git0.1c496ed-160000.1.1 | OPENSUSE-SU-2026:22175-1 | Nov 7, 2026 |
| aws-nitro-enclaves-cli · sles 15.6 | 1.5.2~git0.1c496ed-150600.10.18.1 | SUSE-SU-2026:5066-1 | Nov 7, 2026 |
| aws-nitro-enclaves-cli · sles 15.7 | 1.5.2~git0.1c496ed-150600.10.18.1 | SUSE-SU-2026:5066-1 | Nov 7, 2026 |
| aws-nitro-enclaves-cli · sles 16.0 | 1.5.2~git0.1c496ed-160000.1.1 | SUSE-SU-2026:24467-1 | Nov 7, 2026 |
| rust-rustls-webpki · Debian 14 | 0.103.13+ds-1 | DEBIAN-CVE-2026-93600 | Sep 19, 2026 |
| rustup · opensuse-leap 16.0 | 1.29.1~0-160000.1.1 | OPENSUSE-SU-2026:22016-1 | Oct 2, 2026 |
| rustup · sles 16.0 | 1.29.1~0-160000.1.1 | SUSE-SU-2026:24014-1 | Oct 2, 2026 |
| sccache · opensuse-leap 16.0 | 0.18.0~2-160000.1.1 | OPENSUSE-SU-2026:21982-1 | Sep 30, 2026 |
| sccache · sles 16.0 | 0.18.0~2-160000.1.1 | SUSE-SU-2026:23983-1 | Sep 30, 2026 |
| sequoia-sq · opensuse-leap 16.0 | 1.5.0-bp160.1.1 | OPENSUSE-RU-2026:22132-1 | Nov 7, 2026 |
| shadowsocks-libev · opensuse-leap 16.0 | 3.3.6-bp160.3.1 | OPENSUSE-SU-2026:22189-1 | Nov 7, 2026 |
| shadowsocks-rust · opensuse-leap 16.0 | 1.25.0-bp160.1.1 | OPENSUSE-SU-2026:22189-1 | Nov 7, 2026 |
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