CVE-2026-41395: OpenClaw before 2026.3.28 contains a webhook replay vulnerability in Plivo V3 signature verification that cano

Routine

HIGH 7.5REMOTEUPGRADE

CVE-2026-41395 is a high-severity flaw (CVSS 7.5) affecting openclaw. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

OpenClaw before 2026.3.28 contains a webhook replay vulnerability in Plivo V3 signature verification that canonicalizes query ordering for signatures but hashes raw URLs for replay detection. Attackers can reorder query parameters to bypass replay cache detection and trigger duplicate voice-call processing with a captured valid signed webhook.

Why this priority

High severity
Remotely exploitable, no login, no user action

A fixed release or distro patch exists.

Risk facts

CVSS score	7.5 (High)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	0.1% (top 96%)
CISA exploited list	No
Weakness	CWE-325
Published	2026-04-28
Last modified	2026-06-17

Publisher (CNA): VulnCheck · Vendor: openclaw

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-04-28 19:37 UTCPublished CVE record published
2026-06-17 10:46 UTCUpdated Record last modified

openclaw openclaw UPGRADE

Affected: < 2026.3.28

Fixed in: 2026.3.28

Safe to downgrade to: no unaffected older release

1. Check installed version

npm ls openclaw

2. UPGRADE to 2026.3.28

npm install openclaw@">=2026.3.28"

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-2026-41395?

openclaw: upgrade to 2026.3.28. Exact commands for each OS are on this page.

Is CVE-2026-41395 being exploited?

CVE-2026-41395 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-2026-41395 affect?

CVE-2026-41395 affects openclaw. Severity is high (CVSS 7.5). OpenClaw before 2026.3.28 contains a webhook replay vulnerability in Plivo V3 signature verification that canonicalizes query ordering for signatures but hashes raw URLs for replay detection. Attackers can reorder query parameters to bypass

How urgent is CVE-2026-41395?

Priority 32/100. High severity; Remotely exploitable, no login, no user action

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References

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