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CVE-2026-47783

CVE-2026-47783

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

In memcached before 1.6.42, username data for SASL password database authentication has a timing side channel because a loop exits as soon as a valid username is found by sasl_server_userdb_checkpass.

CVSS 8.1 · High · EPSS 1.3% · Fix available

Published
Updated

Stack: system · database

Affected products and versions

  • memcached

    Versions
    • ≥ 0, < 1.6.42: Affected (semver)

    Update to 1.6.42

  • memcached Debian:12

    Versions
    • 1.6.18-1
    Affected ranges
    • ECOSYSTEM: < 1.6.18-1+deb12u1

    Update to 1.6.18-1+deb12u1

  • memcached Debian:13

    Versions
    • 1.6.38-1
    • 1.6.39-1
    • 1.6.39-2
    • 1.6.40-1
    • 1.6.41-1
    • 1.6.41-2
    • 1.6.42-1
    • 1.6.45-1
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

  • memcached Debian:14

    Versions
    • 1.6.38-1
    • 1.6.39-1
    • 1.6.39-2
    • 1.6.40-1
    • 1.6.41-1
    • 1.6.41-2
    Affected ranges
    • ECOSYSTEM: < 1.6.42-1

    Update to 1.6.42-1

  • memcached Ubuntu:Pro:16.04:LTS

    Versions
    • 1.4.24-2ubuntu1
    • 1.4.25-1ubuntu2
    • 1.4.25-2ubuntu1
    • 1.4.25-2ubuntu1.2
    • 1.4.25-2ubuntu1.3
    • 1.4.25-2ubuntu1.4
    • 1.4.25-2ubuntu1.5
    • 1.4.25-2ubuntu1.5+esm1
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

  • memcached Ubuntu:Pro:18.04:LTS

    Versions
    • 1.4.33-1ubuntu3
    • 1.5.4-1ubuntu2
    • 1.5.4-1ubuntu3
    • 1.5.6-0ubuntu1
    • 1.5.6-0ubuntu1.1
    • 1.5.6-0ubuntu1.2
    • 1.5.6-0ubuntu1.2+esm1
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

  • memcached Ubuntu:20.04:LTS

    Versions
    • 1.5.10-0ubuntu3
    • 1.5.10-0ubuntu4
    • 1.5.19-2
    • 1.5.20-1
    • 1.5.22-1ubuntu1
    • 1.5.22-2
    • 1.5.22-2ubuntu0.1
    • 1.5.22-2ubuntu0.2
    • 1.5.22-2ubuntu0.3
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

  • memcached Ubuntu:22.04:LTS

    Versions
    • 1.6.9+dfsg-1build1
    • 1.6.12+dfsg-2ubuntu1
    • 1.6.12+dfsg-3
    • 1.6.12+dfsg-4
    • 1.6.13-1
    • 1.6.14-1
    • 1.6.14-1ubuntu0.1
    Affected ranges
    • ECOSYSTEM: < 1.6.14-1ubuntu0.2

    Update to 1.6.14-1ubuntu0.2

  • memcached Ubuntu:24.04:LTS

    Versions
    • 1.6.21-1
    • 1.6.22-1
    • 1.6.23-1
    • 1.6.24-1build1
    • 1.6.24-1build3
    Affected ranges
    • ECOSYSTEM: < 1.6.24-1ubuntu0.1

    Update to 1.6.24-1ubuntu0.1

  • memcached Ubuntu:25.10

    Versions
    • 1.6.37-1
    • 1.6.38-1
    • 1.6.38-1build1
    Affected ranges
    • ECOSYSTEM: < 1.6.38-1ubuntu0.1

    Update to 1.6.38-1ubuntu0.1

  • memcached Ubuntu:26.04:LTS

    Versions
    • 1.6.38-1build1
    • 1.6.39-2
    • 1.6.40-1
    Affected ranges
    • ECOSYSTEM: < 1.6.40-1ubuntu0.1

    Update to 1.6.40-1ubuntu0.1

Original sources

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