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CVE-2026-88647

CVE-2026-88647

This page contains facts from public vulnerability sources. Check the original advisory before updating.

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.

CVSS 6.5 · Medium · EPSS 0.2%

Published
Updated

Stack: system

Affected products and versions

  • n/a

    Versions
    • n/a: Affected

    No fix published

  • gnutls28 Debian:12

    Versions
    • 3.7.9-2
    • 3.7.9-2+deb12u1
    • 3.7.9-2+deb12u2
    • 3.7.9-2+deb12u3
    • 3.7.9-2+deb12u4
    • 3.7.9-2+deb12u5
    • 3.7.9-2+deb12u6
    • 3.7.9-2+deb12u7
    • 3.7.9-2+loong64
    • 3.8.0+git20230413-1
    • 3.8.0+git20230529-1
    • 3.8.0+git20230713-1
    • 3.8.1-1
    • 3.8.1-2
    • 3.8.1-3
    • 3.8.1-4
    • 3.8.10-1
    • 3.8.10-2
    • 3.8.10-3
    • 3.8.11-1
    • 3.8.11-2
    • 3.8.11-3
    • 3.8.12-1
    • 3.8.12-2
    • 3.8.12-3
    • 3.8.12-4
    • 3.8.13-1
    • 3.8.2-1
    • 3.8.3-1
    • 3.8.3-1.1
    • 3.8.3-1.1~exp1
    • 3.8.4-1
    • 3.8.4-2
    • 3.8.5-1
    • 3.8.5-2
    • 3.8.5-3
    • 3.8.5-4
    • 3.8.6-1
    • 3.8.6-2
    • 3.8.7.1-1
    • 3.8.8-1
    • 3.8.8-2
    • 3.8.9-1
    • 3.8.9-2
    • 3.8.9-3
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

  • gnutls28 Debian:13

    Versions
    • 3.8.10-1
    • 3.8.10-2
    • 3.8.10-3
    • 3.8.11-1
    • 3.8.11-2
    • 3.8.11-3
    • 3.8.12-1
    • 3.8.12-2
    • 3.8.12-3
    • 3.8.12-4
    • 3.8.13-1
    • 3.8.9-3
    • 3.8.9-3+deb13u1
    • 3.8.9-3+deb13u2
    • 3.8.9-3+deb13u3
    • 3.8.9-3+deb13u4
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

  • gnutls28 Debian:14

    Versions
    • 3.8.10-1
    • 3.8.10-2
    • 3.8.10-3
    • 3.8.11-1
    • 3.8.11-2
    • 3.8.11-3
    • 3.8.12-1
    • 3.8.12-2
    • 3.8.12-3
    • 3.8.12-4
    • 3.8.13-1
    • 3.8.9-3
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

  • gnutls26 Ubuntu:Pro:14.04:LTS

    Versions
    • 2.12.23-1ubuntu4
    • 2.12.23-1ubuntu5
    • 2.12.23-12ubuntu1
    • 2.12.23-12ubuntu2
    • 2.12.23-12ubuntu2.1
    • 2.12.23-12ubuntu2.2
    • 2.12.23-12ubuntu2.3
    • 2.12.23-12ubuntu2.4
    • 2.12.23-12ubuntu2.5
    • 2.12.23-12ubuntu2.6
    • 2.12.23-12ubuntu2.7
    • 2.12.23-12ubuntu2.8
    • 2.12.23-12ubuntu2.10+esm1
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

  • gnutls28 Ubuntu:Pro:16.04:LTS

    Versions
    • 3.3.15-5ubuntu2
    • 3.3.18-1ubuntu1
    • 3.3.20-1ubuntu1
    • 3.4.9-2ubuntu1
    • 3.4.10-4ubuntu1
    • 3.4.10-4ubuntu1.1
    • 3.4.10-4ubuntu1.2
    • 3.4.10-4ubuntu1.3
    • 3.4.10-4ubuntu1.4
    • 3.4.10-4ubuntu1.5
    • 3.4.10-4ubuntu1.6
    • 3.4.10-4ubuntu1.7
    • 3.4.10-4ubuntu1.8
    • 3.4.10-4ubuntu1.9
    • 3.4.10-4ubuntu1.9+esm1
    • 3.4.10-4ubuntu1.9+esm2
    • 3.4.10-4ubuntu1.9+esm3
    • 3.4.10-4ubuntu1.9+esm4
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

  • gnutls28 Ubuntu:Pro:18.04:LTS

    Versions
    • 3.5.8-6ubuntu3
    • 3.5.17-1ubuntu1
    • 3.5.17-1ubuntu3
    • 3.5.18-1ubuntu1
    • 3.5.18-1ubuntu1.1
    • 3.5.18-1ubuntu1.2
    • 3.5.18-1ubuntu1.3
    • 3.5.18-1ubuntu1.4
    • 3.5.18-1ubuntu1.5
    • 3.5.18-1ubuntu1.6
    • 3.5.18-1ubuntu1.6+esm1
    • 3.5.18-1ubuntu1.6+esm2
    • 3.5.18-1ubuntu1.6+esm3
    • 3.5.18-1ubuntu1.6+esm4
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

  • gnutls28 Ubuntu:Pro:20.04:LTS

    Versions
    • 3.6.9-5ubuntu1
    • 3.6.9-5ubuntu2
    • 3.6.10-5
    • 3.6.11.1-2
    • 3.6.11.1-2ubuntu2
    • 3.6.13-2ubuntu1
    • 3.6.13-2ubuntu1.1
    • 3.6.13-2ubuntu1.2
    • 3.6.13-2ubuntu1.3
    • 3.6.13-2ubuntu1.6
    • 3.6.13-2ubuntu1.7
    • 3.6.13-2ubuntu1.8
    • 3.6.13-2ubuntu1.9
    • 3.6.13-2ubuntu1.10
    • 3.6.13-2ubuntu1.11
    • 3.6.13-2ubuntu1.12
    • 3.6.13-2ubuntu1.12+esm1
    • 3.6.13-2ubuntu1.12+esm2
    • 3.6.13-2ubuntu1.12+esm3
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

  • gnutls28 Ubuntu:22.04:LTS

    Versions
    • 3.7.1-5ubuntu1
    • 3.7.2-2ubuntu1
    • 3.7.2-4ubuntu1
    • 3.7.2-5ubuntu1
    • 3.7.3-4ubuntu1
    • 3.7.3-4ubuntu1.1
    • 3.7.3-4ubuntu1.2
    • 3.7.3-4ubuntu1.3
    • 3.7.3-4ubuntu1.4
    • 3.7.3-4ubuntu1.5
    • 3.7.3-4ubuntu1.6
    • 3.7.3-4ubuntu1.7
    • 3.7.3-4ubuntu1.8
    • 3.7.3-4ubuntu1.9
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

  • gnutls28 Ubuntu:Pro:FIPS-preview:22.04:LTS

    Versions
    • 3.7.3-4ubuntu1.2+Fips1.1
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

  • gnutls28 Ubuntu:Pro:FIPS-updates:22.04:LTS

    Versions
    • 3.7.3-4ubuntu1.2+Fips1.1
    • 3.7.3-4ubuntu1.3+Fips1.1
    • 3.7.3-4ubuntu1.4+Fips1
    • 3.7.3-4ubuntu1.5+Fips1
    • 3.7.3-4ubuntu1.6+Fips1
    • 3.7.3-4ubuntu1.7+Fips1
    • 3.7.3-4ubuntu1.7+Fips1.1
    • 3.7.3-4ubuntu1.8+Fips1.1
    • 3.7.3-4ubuntu1.9+Fips1
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

  • gnutls28 Ubuntu:24.04:LTS

    Versions
    • 3.8.1-4ubuntu1
    • 3.8.1-4ubuntu6
    • 3.8.1-4ubuntu7
    • 3.8.3-1ubuntu1
    • 3.8.3-1.1ubuntu2
    • 3.8.3-1.1ubuntu3
    • 3.8.3-1.1ubuntu3.1
    • 3.8.3-1.1ubuntu3.2
    • 3.8.3-1.1ubuntu3.3
    • 3.8.3-1.1ubuntu3.4
    • 3.8.3-1.1ubuntu3.5
    • 3.8.3-1.1ubuntu3.6
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

  • gnutls28 Ubuntu:Pro:FIPS-updates:24.04:LTS

    Versions
    • 3.8.3-1.1ubuntu3.1+Fips1
    • 3.8.3-1.1ubuntu3.4+Fips1
    • 3.8.3-1.1ubuntu3.4+Fips1.1
    • 3.8.3-1.1ubuntu3.5+Fips1.1
    • 3.8.3-1.1ubuntu3.6+Fips1.2
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

  • gnutls28 Ubuntu:26.10

    Versions
    • 3.8.12-2ubuntu1
    • 3.8.12-2ubuntu1.1
    • 3.8.13-1ubuntu1
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

  • gnutls28 Ubuntu:26.04:LTS

    Versions
    • 3.8.9-3ubuntu2
    • 3.8.10-3ubuntu1
    • 3.8.12-2ubuntu1
    • 3.8.12-2ubuntu1.1
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

Original sources

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