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CVE-2026-53859

CVE-2026-53859 · OpenClaw < 2026.5.26 - Hostname Validation Bypass via Trailing-Dot Inconsistency

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

OpenClaw before 2026.5.26 contains a hostname validation vulnerability allowing attackers to bypass blocklist comparisons using trailing-dot notation in model or workspace-derived URLs. Attackers can exploit inconsistent hostname checks to reach destinations that operators intended to block through hostname policies.

CVSS 6.0 · Medium · EPSS 0.4% · Fix available

Published
Updated

Stack: node

Affected products and versions

  • openclaw

    Versions
    • ≥ 0, < 2026.5.26: Affected (semver)
    • 2026.5.26: Not affected (semver)

    Update to 2026.5.26

  • openclaw npm

    Affected ranges
    • SEMVER: < 2026.5.26

    Update to 2026.5.26

Original sources

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