Medium severity6.5NVD Advisory· Published Jun 16, 2026· Updated Jun 17, 2026
CVE-2026-53859
CVE-2026-53859
Description
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.
AI Insight
LLM-synthesized narrative grounded in this CVE's description and references.
Affected packages
Versions sourced from the GitHub Security Advisory.
| Package | Affected versions | Patched versions |
|---|---|---|
openclawnpm | < 2026.5.26 | 2026.5.26 |
Affected products
5Patches
Vulnerability mechanics
References
4- github.com/advisories/GHSA-gxg4-2rrr-jhc7ghsaADVISORY
- github.com/openclaw/openclaw/security/advisories/GHSA-gxg4-2rrr-jhc7nvdVendor AdvisoryMitigationWEB
- nvd.nist.gov/vuln/detail/CVE-2026-53859ghsaADVISORY
- www.vulncheck.com/advisories/openclaw-hostname-validation-bypass-via-trailing-dot-inconsistencynvdThird Party AdvisoryWEB
News mentions
1- OpenClaw: 25 CVEs Disclosed in a Single Day — Allowlist Bypasses and Privilege Escalation DominateVypr Intelligence · Jun 16, 2026