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CVE-2026-34475

CVE-2026-34475

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

Varnish Cache before 8.0.1 and Varnish Enterprise before 6.0.16r12, in certain unchecked req.url scenarios, mishandle URLs with a path of / for HTTP/1.1, potentially leading to cache poisoning or authentication bypass.

CVSS 5.4 · Medium · EPSS 0.2% · Fix available

Published
Updated

Stack: system

Affected products and versions

  • varnish cache

    Versions
    • ≥ 0, < 6.0.17 LTS: Affected (custom)
    • ≥ 7.0.0, < 8.0.1: Affected (custom)

    Update to 6.0.17 LTS; Update to 8.0.1

  • varnish Debian:12

    Versions
    • 7.1.1-1.1
    • 7.1.1-1.1+deb12u1
    • 7.1.1-1.2
    • 7.1.1-2+deb12u1
    • 7.5.0-1
    • 7.5.0-2
    • 7.5.0-3
    • 7.6.0-1
    • 7.6.0-2
    • 7.6.1-1
    • 7.6.1-2
    • 7.7.0-1
    • 7.7.0-2
    • 7.7.0-3
    • 7.7.1-1
    • 7.7.2-1
    • 7.7.2-2
    • 7.7.3-1
    • 7.7.3-2
    • 7.7.3-3
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

  • varnish Debian:13

    Versions
    • 7.7.0-3
    • 7.7.0-3+deb13u1
    Affected ranges
    • ECOSYSTEM: < 7.7.0-3+deb13u2

    Update to 7.7.0-3+deb13u2

  • varnish Ubuntu:14.04:LTS

    Versions
    • 3.0.4-1ubuntu1
    • 3.0.4-1ubuntu2
    • 3.0.5-1ubuntu2
    • 3.0.5-2
    • 3.0.5-2ubuntu0.1
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

  • varnish Ubuntu:Pro:16.04:LTS

    Versions
    • 4.0.3-1
    • 4.1.0-1
    • 4.1.0-2
    • 4.1.1-1
    • 4.1.1-1ubuntu0.2
    • 4.1.1-1ubuntu0.2+esm1
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

  • varnish Ubuntu:Pro:18.04:LTS

    Versions
    • 5.0.0-7.1
    • 5.2.1-1
    • 5.2.1-1ubuntu0.1
    • 5.2.1-1ubuntu0.1+esm1
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

  • varnish Ubuntu:Pro:20.04:LTS

    Versions
    • 6.1.1-1
    • 6.2.1-2
    • 6.2.1-2ubuntu0.1~esm1
    • 6.2.1-2ubuntu0.1~esm2
    • 6.2.1-2ubuntu0.1
    • 6.2.1-2ubuntu0.2
    • 6.2.1-2ubuntu0.2+esm1
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

  • varnish Ubuntu:Pro:22.04:LTS

    Versions
    • 6.5.2-1
    • 6.6.1-1
    • 6.6.1-1ubuntu0.2
    • 6.6.1-1ubuntu0.2+esm1
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

  • varnish Ubuntu:24.04:LTS

    Versions
    • 7.1.1-1.1ubuntu1
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

  • varnish Ubuntu:25.10

    Versions
    • 7.7.0-1
    • 7.7.0-2
    • 7.7.0-3
    • 7.7.3-1
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

  • varnish Ubuntu:26.10

    Versions
    • 7.7.3-1build1
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

  • varnish Ubuntu:26.04:LTS

    Versions
    • 7.7.3-1
    • 7.7.3-1build1
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

Original sources

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