CVE-2026-53839CWE-1023

CVE-2026-53839

Medium · published June 13, 2026

CVSS v3.1
6.5
EPSS
0%
Percentile
39.0
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v3.1
6.5 · MEDIUM
Vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
CVSS v4.0
Not supplied
EPSS
0.00461 · 39.0th percentile
Weakness
CWE-1023 · Incomplete Comparison with Missing Factors
Published
2026-06-13T02:16Z
Affected products (1)
ProductVersionsFixed in
openclaw/openclaw< 2026.5.72026.5.7
References (2)
https://github.com/openclaw/openclaw/security/advisories/GHSA-77q5-rr5v-x43q · [email protected]https://www.vulncheck.com/advisories/openclaw-hostname-prefix-matching-bypass-in-trusted-retry-endpoint-validation · [email protected]
EPSS history
Timeline
  • 12 JUN 21:57Z
    OpenClaw < 2026.5.7 - Hostname Prefix Matching Bypass in Trusted Retry Endpoint Validation
    cvelistv5