What’s Vulnerable › Vulnerabilities

CVE-2025-22865: ParsePKCS1PrivateKey panic with partial keys in crypto/x509

• Severity: high (CVSS 7.5 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

Using ParsePKCS1PrivateKey to parse a RSA key that is missing the CRT values would panic when verifying that the key is well formed.

Affected products

• Go standard library crypto/x509: from 1.24.0-0 before 1.24.0-rc.2 — fixed in 1.24.0-rc.2

How to fix

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

References

• https://go.dev/cl/643098
• https://go.dev/issue/71216
• https://groups.google.com/g/golang-dev/c/CAWXhan3Jww/m/bk9LAa-lCgAJ
• https://pkg.go.dev/vuln/GO-2025-3421

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