What’s Vulnerable › Vulnerabilities

CVE-2024-45341: Usage of IPv6 zone IDs can bypass URI name constraints in crypto/x509

• Severity: medium (CVSS 6.1 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.6% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2025-01-28 · updated 2026-06-17

Description

A certificate with a URI which has a IPv6 address with a zone ID may incorrectly satisfy a URI name constraint that applies to the certificate chain. Certificates containing URIs are not permitted in the web PKI, so this only affects users of private PKIs which make use of URIs.

Affected products

• Go standard library crypto/x509: before 1.22.11; from 1.23.0-0 before 1.23.5; from 1.24.0-0 before 1.24.0-rc.2 — fixed in 1.22.11, 1.23.5, 1.24.0-rc.2

How to fix

Upgrade to a fixed version: Go standard library crypto/x509 1.22.11, 1.23.5, 1.24.0-rc.2. Check the vendor advisory for mitigations.

References

• https://go.dev/cl/643099
• https://go.dev/issue/71156
• https://groups.google.com/g/golang-dev/c/CAWXhan3Jww/m/bk9LAa-lCgAJ
• https://groups.google.com/g/golang-dev/c/bG8cv1muIBM/m/G461hA6lCgAJ
• https://pkg.go.dev/vuln/GO-2025-3373
• https://security.netapp.com/advisory/ntap-20250221-0004/

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