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.

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Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor Product Default status Versions
n/a n/a affected
Version Status Constraints
n/a affected —

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Fixes

Solution

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Workaround

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References
Link Providers
https://gist.github.com/lkloliver/f98ec3de1a871fdfc02b70b8b9ba7642 cve-icon cve-icon
https://gitlab.com/gnutls/gnutls/-/issues/1802 cve-icon cve-icon
History

Thu, 08 Oct 2026 19:15:00 +0000

Type Values Removed Values Added
Title GnuTLS 3.8.13 Hostname Verification Bypass Enables Eavesdropping
Weaknesses CWE-640

Thu, 08 Oct 2026 17:00:00 +0000

Type Values Removed Values Added
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.
References

Projects

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cve-icon MITRE

Status: PUBLISHED

Assigner: mitre

Published:

Updated: 2026-10-08T16:35:41.361Z

Reserved: 2026-09-10T00:00:00.000Z

Link: CVE-2026-88647

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Received

Published: 2026-10-08T17:17:17.783

Modified: 2026-10-08T17:17:17.783

Link: CVE-2026-88647

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-10-08T19:00:07Z

Weaknesses