CVE-2026-53820: OpenClaw before 2026.5.12 contains an exec denylist bypass vulnerability in the bundle MCP loopback session-sp

Routine

MEDIUM 6.6UPGRADE

CVE-2026-53820 is a medium-severity flaw (CVSS 6.6) affecting openclaw. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

OpenClaw before 2026.5.12 contains an exec denylist bypass vulnerability in the bundle MCP loopback session-spawn path that allows authenticated callers to bypass intended command restrictions. Attackers can reach the affected bundled MCP session-spawn path to start sessions with broader command reach than intended.

Why this priority

No elevated risk signals yet

A fixed release or distro patch exists.

Risk facts

CVSS score	6.6 (Medium)
Attack vector	Local
Attack complexity	Low
Privileges needed	Low
User interaction	None
EPSS exploit chance	0.1% (top 99%)
CISA exploited list	No
Weakness	CWE-862
Published	2026-06-12
Last modified	2026-07-23

Publisher (CNA): VulnCheck · Vendor: openclaw

Last updated 2026-07-23 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-06-12 22:16 UTCPublished CVE record published
2026-07-23 09:10 UTCUpdated Record last modified

openclaw openclaw UPGRADE

Affected: < 2026.5.12

Fixed in: 2026.5.12

Safe to downgrade to: no unaffected older release

1. Check installed version

npm ls openclaw

2. UPGRADE to 2026.5.12

npm install openclaw@">=2026.5.12"

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2026-53820?

openclaw: upgrade to 2026.5.12. Exact commands for each OS are on this page.

Is CVE-2026-53820 being exploited?

CVE-2026-53820 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2026-53820 affect?

CVE-2026-53820 affects openclaw. Severity is medium (CVSS 6.6). OpenClaw before 2026.5.12 contains an exec denylist bypass vulnerability in the bundle MCP loopback session-spawn path that allows authenticated callers to bypass intended command restrictions. Attackers can reach the affected bundled MCP s

How urgent is CVE-2026-53820?

Priority 23/100. No elevated risk signals yet.

Related CVEs

CVE-2026-53855 HIGH 8.1 UPGRADE OpenClaw before 2026.4.2 contains an inline-eval bypass vulnerability allowing authenticated operators to weak
CVE-2026-53857 HIGH 8.1 UPGRADE OpenClaw before 2026.5.3 contains a policy enforcement vulnerability where Zalo contacts with mutable display
CVE-2026-53851 MEDIUM 5.3 UPGRADE OpenClaw before 2026.5.12 contains a notification bypass vulnerability allowing Slack reaction events to enter
CVE-2026-53846 HIGH 7.1 UPGRADE OpenClaw before 2026.4.29 contains a path traversal vulnerability in the install helper that allows workspace
CVE-2026-59261 HIGH 7.1 UPGRADE OpenClaw before 2026.5.28 contains a credential exposure vulnerability where workspace dotenv files can overri

References

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