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CVE-2026-33195

CVE-2026-33195 · Rails Active Storage has possible Path Traversal in DiskService

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

Active Storage allows users to attach cloud and local files in Rails applications. Prior to versions 8.1.2.1, 8.0.4.1, and 7.2.3.1, Active Storage's `DiskService#path_for` does not validate that the resolved filesystem path remains within the storage root directory. If a blob key containing path traversal sequences (e.g. `../`) is used, it could allow reading, writing, or deleting arbitrary files on the server. Blob keys are expected to be trusted strings, but some applications could be passing user input as keys and would be affected. Versions 8.1.2.1, 8.0.4.1, and 7.2.3.1 contain a patch.

CVSS 8.0 · High · EPSS 0.6% · Fix available

Published
Updated

Stack: system

Affected products and versions

  • activestorage

    Versions
    • >= 8.1.0.beta1, < 8.1.2.1: Affected
    • >= 8.0.0.beta1, < 8.0.4.1: Affected
    • < 7.2.3.1: Affected

    No fix published

  • rails Debian:12

    Versions
    • 2:6.1.7.10+dfsg-1~deb12u1
    • 2:6.1.7.10+dfsg-1~deb12u2
    • 2:6.1.7.3+dfsg-1
    • 2:6.1.7.3+dfsg-10
    • 2:6.1.7.3+dfsg-11
    • 2:6.1.7.3+dfsg-12
    • 2:6.1.7.3+dfsg-13
    • 2:6.1.7.3+dfsg-2
    • 2:6.1.7.3+dfsg-2~deb12u1
    • 2:6.1.7.3+dfsg-3
    • 2:6.1.7.3+dfsg-4
    • 2:6.1.7.3+dfsg-5
    • 2:6.1.7.3+dfsg-6
    • 2:6.1.7.3+dfsg-7
    • 2:6.1.7.3+dfsg-7~exp1
    • 2:6.1.7.3+dfsg-8
    • 2:6.1.7.3+dfsg-9
    Affected ranges
    • ECOSYSTEM: < 2:6.1.7.10+dfsg-1~deb12u3

    Update to 2:6.1.7.10+dfsg-1~deb12u3

  • rails Debian:13

    Versions
    • 2:7.2.2.1+dfsg-7
    • 2:7.2.2.2+dfsg-1
    • 2:7.2.2.2+dfsg-2~deb13u1
    Affected ranges
    • ECOSYSTEM: < 2:7.2.2.2+dfsg-2~deb13u2

    Update to 2:7.2.2.2+dfsg-2~deb13u2

  • rails Debian:14

    Versions
    • 2:7.2.2.1+dfsg-7
    • 2:7.2.2.2+dfsg-1
    • 2:7.2.2.2+dfsg-2
    • 2:7.2.2.2+dfsg-2~deb13u1
    • 2:7.2.2.2+dfsg-2~deb13u2
    • 2:7.2.3+dfsg-1
    • 2:7.2.3+dfsg-2
    • 2:7.2.3+dfsg-3
    Affected ranges
    • ECOSYSTEM: < 2:7.2.3.1+dfsg-1

    Update to 2:7.2.3.1+dfsg-1

  • rails Ubuntu:Pro:16.04:LTS

    Versions
    • 2:4.1.10-1
    • 2:4.2.5-1
    • 2:4.2.5.1-1
    • 2:4.2.5.2-2
    • 2:4.2.6-1
    • 2:4.2.6-1ubuntu0.1~esm1
    • 2:4.2.6-1ubuntu0.1~esm2
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

  • rails Ubuntu:Pro:18.04:LTS

    Versions
    • 2:4.2.9-2
    • 2:4.2.9-4
    • 2:4.2.10-0ubuntu4
    • 2:4.2.10-0ubuntu4+esm1
    • 2:4.2.10-0ubuntu4+esm2
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

  • rails Ubuntu:Pro:20.04:LTS

    Versions
    • 2:5.2.2.1+dfsg-1ubuntu1
    • 2:5.2.3+dfsg-3
    • 2:5.2.3+dfsg-3ubuntu0.1~esm1
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

  • rails Ubuntu:Pro:22.04:LTS

    Versions
    • 2:6.0.3.7+dfsg-2
    • 2:6.1.4.1+dfsg-8ubuntu2
    • 2:6.1.4.1+dfsg-8ubuntu2+esm1
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

  • rails Ubuntu:24.04:LTS

    Versions
    • 2:6.1.7.3+dfsg-2build1
    • 2:6.1.7.3+dfsg-3
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

  • rails Ubuntu:25.10

    Versions
    • 2:6.1.7.3+dfsg-7
    • 2:7.2.2.1+dfsg-7
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

  • rails Ubuntu:26.10

    Versions
    • 2:7.2.3+dfsg-2
    • 2:7.2.3.2+dfsg-2
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

  • rails Ubuntu:26.04:LTS

    Versions
    • 2:7.2.2.1+dfsg-7
    • 2:7.2.2.2+dfsg-2
    • 2:7.2.3+dfsg-2
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

Original sources

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