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Back to active CVEs
Medium · CVSS 6.0CVE-2026-53839

OpenClaw < 2026.5.7 - Hostname Prefix Matching Bypass in Trusted Retry Endpoint ValidationCVE-2026-53839

Answer in brief

CVE-2026-53839 records a Medium severity (CVSS 6.0) vulnerability in OpenClaw < 2026.5.7 - Hostname Prefix Matching Bypass in Trusted Retry Endpoint Validation. The current sources do not mark it as known exploited. The current feed maps OpenClaw/OpenClaw (generic). Check affected ranges and fixed versions before updating.

Analysis pending evidence review

HOL Guard separates source facts from reviewed analysis. See the methodology.

Published Jun 12, 2026Updated Oct 8, 2026Source checked Oct 8, 2026First seen by HOL Oct 8, 2026Material review Oct 8, 2026
Upstream Advisory

Key facts

Risk
Medium · CVSS 6.0
Exploitation
Not marked as known exploited
Affected software
1 mapped package or product
Fix availability
Available

Why this deserves its current priority

CVSS is 6.0. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.

Analysis status

Analysis pending evidence review

Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.

Affected scope and exposure questions

The current feed maps OpenClaw/OpenClaw (generic). Check affected ranges and fixed versions before updating.

Mapped affected packages and fixed versions
PackageAffected rangeFixed version
OpenClaw/OpenClawgeneric>=0 <2026.5.72026.5.7

Recommended response

  1. 1Check inventory. Check lockfiles and deployed manifests for OpenClaw/OpenClaw.
  2. 2Review the reported fix. Update OpenClaw/OpenClaw to 2026.5.7 if you use the affected versions. Test the change in a non-production environment first.

Evidence timeline and material changes

  1. Published upstream

    Jun 12, 2026

    Evidence: source:cvelist:source_dates:source-dates:record

  2. Source modified

    Oct 8, 2026

    Evidence: source:cvelist:source_dates:source-dates:record

  3. First seen by HOL

    Oct 8, 2026

Sources and claim methodology

  • GitHub security advisorygithub.com
  • Source referencevulncheck.com
Upstream source description

OpenClaw before 2026.5.7 contains a hostname validation vulnerability in retry endpoint checks that allows matching hostname prefixes instead of exact hostnames. Attackers can exploit this by crafting a hostname prefix resembling a trusted host to send authentication material to untrusted endpoints.

Quoted source text, attributed separately from HOL analysis.

Related CVEs

  • Obsidian Desktop < 1.14.0 RCE via Slides Plugin MarkdownSame generic ecosystem
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  • mk-oracle: Local privilege escalation via malicious Oracle Instant ClientSame generic ecosystem
  • WordPress MainWP Child plugin <= 6.2.1 - Deserialization of untrusted data vulnerabilitySame generic ecosystem
  • HP Sure Click Kernel Buffer OverflowSame generic ecosystem
  • Zimbra Collaboration Suite EWS Extension Authorization Bypass via Crafted Composite Folder/Item IdentifierSame generic ecosystem

Record context

Vulnerability class
Missing Auth
EPSS
Not reported
CWE IDs
CWE-1023
Source
CVE List V5
Source checked
Oct 8, 2026
References
2 linked sources
Open source record