{"id":"CVE-2026-93600","title":"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","summary":"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. Becaus…","severity":"low","cvss":2.2,"cvssVector":"CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:N/I:L/A:N","cwe":["CWE-295"],"vendor":"rustls","product":"webpki","affected":["webpki >= 0.101.0 < 0.103.12","webpki >= 0.104.0-alpha.1 < 0.104.0-alpha.6"],"patched":["rustls-webpki 0.104.0-alpha.6"],"published":"2026-09-18","updated":"2026-09-22","sourceUpdated":"2026-09-22T20:25:55.870","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-93600","references":[{"url":"https://github.com/rustls/webpki/security/advisories/GHSA-965h-392x-2mh5","label":"disclosure@vulncheck.com"},{"url":"https://www.vulncheck.com/advisories/rustls-webpki-name-constraints-uri-validation-bypass","label":"disclosure@vulncheck.com"},{"url":"https://crates.io/crates/rustls-webpki"},{"url":"https://rustsec.org/advisories/RUSTSEC-2026-0098.html"},{"url":"https://github.com/rustls/webpki"},{"url":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-93600.json"},{"url":"https://access.redhat.com/security/cve/CVE-2026-93600"},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2538296"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-93600"},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-93600"}],"tags":["nvd","cve.org","osv","rust","csaf","vex","red-hat"],"epss":0.00183,"epssPercentile":0.08101,"aliases":["RUSTSEC-2026-0098","GHSA-965h-392x-2mh5"],"ecosystem":"rust","ssvc":{"exploitation":"none","automatable":"no","technicalImpact":"partial","timestamp":"2026-09-21T16:22:50.273345Z"},"ingestedAt":"2026-09-18T13:41:41.662Z","slug":"CVE-2026-93600","body":"## Overview\n\nrustls-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.\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.\n\n## Package advisory (CVE-2026-93600)\n\nAffected packages:\n\n- `rustls-webpki >= 0.104.0-alpha.1, < 0.104.0-alpha.6`\n\nPatched in:\n\n- `rustls-webpki 0.104.0-alpha.6`\n\nSource: https://osv.dev/vulnerability/RUSTSEC-2026-0098\n\n## Vendor advisories\n\n- **Red Hat VEX** · Low · affected: Confidential Cluster Operator, Confidential Compute Attestation, Logging Subsystem for Red Hat OpenShift, Migration Toolkit for Applications 8, OpenShift Lightspeed, OpenShift Service Mesh 3, … · no fix planned: Logging Subsystem for Red Hat OpenShift, Migration Toolkit for Applications 8, OpenShift Service Mesh 3, Red Hat Ansible Automation Platform 2, … · updated 2026-09-22 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-93600.json)","depth":"sunlit","depthScore":12,"depthScoreParts":{"impact":12.1,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}