What’s Vulnerable › Vulnerabilities

CVE-2026-88648

• Severity: low (CVSS 3.7 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.2% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-10-08 · updated 2026-10-29
• Weakness: CWE-295

Description

Incomplete X.509 implementation in GnuTLS v3.8.13 allows attackers controlling a subordinate Certificate Authority to bypass cross-domain PKI restrictions and issue unauthorized certificates.

References

• https://gist.github.com/lkloliver/1f2a97cb8d0b31aa27b6bd0354358d7d
• https://www.rfc-editor.org/rfc/rfc5280#section-4.2.1.10
• https://www.rfc-editor.org/rfc/rfc5280#section-6.1.4

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