CVE-2026-88647

CVE Enrichment

CVSS: 9.1 CRITICAL
EPSS: 0.21%
EPSS Percentile: 10.65%
CISA KEV: Not listed

Description

A hostname verification bypass in GnuTLS v3.8.13 allows attackers to circumvent the Common Name fallback mechanism and eavesdrop on communications via a crafted certificate.

Technical Details

CVSS Version: 3.1
CNA / NVD Source: cve@mitre.org
Published: 09-Oct-2026 00:17
Last Modified: 10-Oct-2026 10:17
EPSS Date: 2026-10-13
CWE: CWE-297

CVSS Vector


            CVSS:3.1                            AV:N /
                            AC:L /
                            PR:N /
                            UI:N /
                            S:U /
                            C:H /
                            I:H /
                            A:N

References

Last enrichment sync: 14-Oct-2026 20:48
Sources: NVD · FIRST EPSS · CISA KEV
Latest successful provider update; providers refresh independently.

Reported Context (1)

CVE-2026-88647 Microsoft October 2026 Updates Fix 1,411 Flaws, Including Three Zero-Days

CVE (1235)

People (2)

MITRE ATT&CK (1)

Vendors (14)

Products (87)

Tools (1)

Note: Related entities, including threat actors, malware, CVEs, MITRE ATT&CK techniques, vendors, products, tools, countries, and industries, are shown when they appear in the same reporting. Their presence does not necessarily mean they were targeted, compromised, vulnerable, responsible for the activity, or directly involved in the incident.