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CVE-2026-59849

CVE-2026-59849 · Libssh: libssh: denial of service via automatic certificate authentication loop

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

A flaw was found in libssh. Logic errors in automatic certificate-based public key authentication can cause libssh clients to loop indefinitely when configured certificates are missing or repeatedly rejected by a server, leading to denial of service.

CVSS 3.1 · Low · EPSS 0.4% · Fix available

Published
Updated

Stack: system

Affected products and versions

  • red hat enterprise linux 10

    Versions
    • ≥ 0:0.12.0-3.el10_2: Not affected (rpm)

    No fix published

  • red hat hardened images

    Versions
    • ≥ 0.12.1-4.hum1: Not affected (rpm)

    No fix published

  • red hat enterprise linux 8

    No fix published

  • red hat enterprise linux 9

    No fix published

  • libssh Debian:13

    Versions
    • 0.11.2-1
    • 0.11.2-1+deb13u1
    • 0.11.3-1
    Affected ranges
    • ECOSYSTEM: < 0.11.5-0+deb13u1

    Update to 0.11.5-0+deb13u1

  • libssh Debian:14

    Versions
    • 0.11.2-1
    • 0.11.3-1
    • 0.12.0-1
    • 0.12.0-2
    • 0.12.0-3
    Affected ranges
    • ECOSYSTEM: < 0.12.1-1

    Update to 0.12.1-1

  • libssh Ubuntu:26.04:LTS

    Versions
    • 0.11.2-1build1
    • 0.11.3-1
    • 0.11.3-1ubuntu1
    • 0.11.3-1ubuntu2
    Affected ranges
    • ECOSYSTEM: < 0.11.3-1ubuntu2.1

    Update to 0.11.3-1ubuntu2.1

Original sources

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