Usage of IPv6 zone IDs can bypass URI name constraints in crypto/x509

MEDIUM 6.1CVE-2024-45341 · BIT-golang-2024-45341 · GO-2025-3373 · Published 28/01/2025 · updated 17/06/2026

In short

CVE-2024-45341 is a MEDIUM (CVSS 6.1) vulnerability affecting stdlib.
Chance of exploitation in the next 30 days (EPSS): 0.57%, higher than 47.1% of all vulnerabilities.
Fix: update to 1.23.5, 1.24.0-rc.2, 1.22.11 or later.

Package	Affected versions	Patched versions
stdlib Go	`≥ 1.23.0-0, < 1.23.5≥ 1.24.0-0, < 1.24.0-rc.2< 1.22.11`	`1.23.51.24.0-rc.21.22.11`

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.

NVD 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.

References

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Package

Affected versions

Patched versions

stdlib

≥ 1.23.0-0, < 1.23.5≥ 1.24.0-0, < 1.24.0-rc.2< 1.22.11

1.23.51.24.0-rc.21.22.11