| { |
| "schema_version": "1.3.1", |
| "id": "GO-2026-4866", |
| "modified": "0001-01-01T00:00:00Z", |
| "published": "0001-01-01T00:00:00Z", |
| "aliases": [ |
| "CVE-2026-33810" |
| ], |
| "summary": "Case-sensitive excludedSubtrees name constraints cause Auth Bypass in crypto/x509", |
| "details": "When verifying a certificate chain containing excluded DNS constraints, these constraints are not correctly applied to wildcard DNS SANs which use a different case than the constraint.\n\nThis only affects validation of otherwise trusted certificate chains, issued by a root CA in the VerifyOptions.Roots CertPool, or in the system certificate pool.", |
| "affected": [ |
| { |
| "package": { |
| "name": "stdlib", |
| "ecosystem": "Go" |
| }, |
| "ranges": [ |
| { |
| "type": "SEMVER", |
| "events": [ |
| { |
| "introduced": "1.26.0-0" |
| }, |
| { |
| "fixed": "1.26.2" |
| } |
| ] |
| } |
| ], |
| "ecosystem_specific": { |
| "imports": [ |
| { |
| "path": "crypto/x509", |
| "symbols": [ |
| "Certificate.Verify", |
| "dnsConstraints.query", |
| "newDNSConstraints" |
| ] |
| } |
| ] |
| } |
| } |
| ], |
| "references": [ |
| { |
| "type": "FIX", |
| "url": "https://go.dev/cl/763763" |
| }, |
| { |
| "type": "REPORT", |
| "url": "https://go.dev/issue/78332" |
| }, |
| { |
| "type": "WEB", |
| "url": "https://groups.google.com/g/golang-announce/c/0uYbvbPZRWU" |
| } |
| ], |
| "credits": [ |
| { |
| "name": "Riyas from Saintgits College of Engineering" |
| }, |
| { |
| "name": "k1rnt" |
| }, |
| { |
| "name": "@1seal" |
| } |
| ], |
| "database_specific": { |
| "url": "https://pkg.go.dev/vuln/GO-2026-4866", |
| "review_status": "REVIEWED" |
| } |
| } |
