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CVE-2026-56706

CVE-2026-56706 · Adminer before 5.4.3 CSRF Token Secret Recovery via XOR Masking

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

Adminer before 5.4.3 uses a CSRF token scheme that transmits both the XOR mask and the masked value in every token (format (rand XOR secret):rand), allowing anyone who observes a single CSRF token (e.g., via network sniffing, log files, Referrer header, or XSS) to recover the session secret with a single XOR operation and forge unlimited valid tokens. The implementation is further weakened by a low-entropy session token (rand(1,1e6), ~20 bits) that permits blind brute-force, and by use of loose comparison (==) in token verification, enabling PHP type juggling. Exploitation enables cross-site request forgery against authenticated sessions, including execution of arbitrary SQL queries.

CVSS 6.1 · Medium · EPSS 0.4% · Fix available

Published
Updated

Stack: system

Affected products and versions

  • adminer

    Versions
    • ≥ 0, < 5.4.3: Affected (semver)
    • 5.4.3: Not affected (semver)

    Update to 5.4.3

  • adminer Debian:12

    Versions
    • 4.8.1-1
    • 4.8.1-2
    • 4.8.1-4
    • 5.1.0-1
    • 5.2.1+dfsg-1
    • 5.3.0+dfsg-1
    • 5.4.0+dfsg-1
    • 5.4.1+dfsg-1
    • 5.4.2+dfsg-1
    • 5.4.3+dfsg-1
    • 5.4.4+dfsg-1
    • 6.0.0-1
    • 6.0.1-1
    • 6.0.2-1
    • 6.1.0-1
    • 6.1.1-1
    • 6.1.2-1
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

  • adminer Debian:13

    Versions
    • 5.2.1+dfsg-1
    • 5.3.0+dfsg-1
    • 5.4.0+dfsg-1
    • 5.4.1+dfsg-1
    • 5.4.2+dfsg-1
    • 5.4.3+dfsg-1
    • 5.4.4+dfsg-1
    • 6.0.0-1
    • 6.0.1-1
    • 6.0.2-1
    • 6.1.0-1
    • 6.1.1-1
    • 6.1.2-1
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

  • adminer Debian:14

    Versions
    • 5.2.1+dfsg-1
    • 5.3.0+dfsg-1
    • 5.4.0+dfsg-1
    • 5.4.1+dfsg-1
    • 5.4.2+dfsg-1
    Affected ranges
    • ECOSYSTEM: < 5.4.3+dfsg-1

    Update to 5.4.3+dfsg-1

  • adminer Ubuntu:Pro:16.04:LTS

    Versions
    • 4.2.1-1
    • 4.2.1-1ubuntu1
    • 4.2.1-1ubuntu1+esm1
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

  • adminer Ubuntu:Pro:18.04:LTS

    Versions
    • 4.3.1-2
    • 4.5.0-1
    • 4.6.1-1
    • 4.6.2-1
    • 4.6.2-1ubuntu0.1~esm1
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

  • adminer Ubuntu:Pro:20.04:LTS

    Versions
    • 4.7.2-1
    • 4.7.4-1
    • 4.7.5-1
    • 4.7.6-1
    • 4.7.6-1ubuntu0.1~esm1
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

  • adminer Ubuntu:22.04:LTS

    Versions
    • 4.7.9-2
    • 4.8.1-1
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

  • adminer Ubuntu:24.04:LTS

    Versions
    • 4.8.1-1
    • 4.8.1-1ubuntu1
    • 4.8.1-2
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

  • adminer Ubuntu:26.04:LTS

    Versions
    • 5.2.1+dfsg-1
    • 5.3.0+dfsg-1
    • 5.4.0+dfsg-1
    • 5.4.1+dfsg-1
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

Original sources

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