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CVE-2026-41362

OpenClaw 2026.2.19 through 2026.3.30 - Webhook Replay Dedupe Cache Event Suppression via Shared Authentication

2.3 LowFix available

OpenClaw versions 2026.2.19 before 2026.3.31 contain an improper cache isolation vulnerability in the Zalo webhook replay-dedupe mechanism that is shared across authenticated webhook targets. Attackers controlling one authenticated Zalo webhook path in multi-account deployments can suppress legitimate events on different accounts by matching event_name and message_id parameters.

Attack profile

How easy it is to exploit

Attack vector
Network
Complexity
Low
Privileges needed
Low
User interaction
None

What an attacker can affect

Confidentiality
None
Integrity
None
Availability
Low

Exploit likelihood

0.27%Up 0.2 points since Apr 28, 2026
90%50%10%1%

What each source reports

CVE List Score used 2.3

OpenClaw 2026.2.19 through 2026.3.30 - Webhook Replay Dedupe Cache Event Suppression via Shared Authentication

OpenClaw versions 2026.2.19 before 2026.3.31 contain an improper cache isolation vulnerability in the Zalo webhook replay-dedupe mechanism that is shared across authenticated webhook targets. Attackers controlling one authenticated Zalo webhook path in multi-account deployments can suppress legitimate events on different accounts by matching event_name and message_id parameters.

Record
CVE-2026-41362
CVSS 4.0
2.3 LowCVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N
CVSS 3.1
4.3 MediumCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L
Weakness
CWE-668
Updated
2026-11-02
EUVDEUVD-2026-25942 2.3

OpenClaw versions 2026.2.19 before 2026.3.31 contain an improper cache isolation vulnerability in the Zalo webhook replay-dedupe mechanism that is shared across authenticated webhook targets. Attackers controlling one authenticated Zalo webhook path in multi-account deployments can suppress legitimate events on different accounts by matching event_name and message_id parameters.

Record
EUVD-2026-25942
CVSS 4.0
2.3 LowCVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N
Updated
2026-11-02
GitHub AdvisoriesGHSA-6h5h-cp2c-8254 2.3

OpenClaw versions 2026.2.19 before 2026.3.31 contain an improper cache isolation vulnerability in...

OpenClaw versions 2026.2.19 before 2026.3.31 contain an improper cache isolation vulnerability in the Zalo webhook replay-dedupe mechanism that is shared across authenticated webhook targets. Attackers controlling one authenticated Zalo webhook path in multi-account deployments can suppress legitimate events on different accounts by matching event_name and message_id parameters.

Record
GHSA-6h5h-cp2c-8254
CVSS 4.0
2.3 LowCVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
CVSS 3.1
4.3 MediumCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L
Weakness
CWE-668
Updated
2026-11-02
GitHub AdvisoriesGHSA-fqrj-m88p-qf3v 2.3

OpenClaw: Zalo replay dedupe cache could suppress events across authenticated webhook targets

Summary

Before OpenClaw 2026.3.31, the Zalo webhook replay-dedupe cache was shared across authenticated webhook targets and keyed too broadly. In multi-account deployments, a replay seen on one account could suppress a legitimate event on another account if event_name and message_id matched.

Impact

An attacker who controlled one authenticated Zalo webhook path in a multi-account gateway deployment could cause silent message suppression on a different Zalo account sharing that gateway. This was an availability issue; it did not provide cross-account authentication or data access.

Affected Packages / Versions

  • Package: openclaw (npm)
  • Affected versions: >= 2026.2.19, < 2026.3.31
  • Patched versions: >= 2026.3.31
  • Latest published npm version: 2026.4.1

Fix Commit(s)

  • 4d038bb242c11f39e45f6a4bde400e5fd42e4ebf — scope webhook replay dedupe per target
  • 7cea7c29705b188b464cc9cdc107c275b94b2a72 — follow-up hardening to scope replay dedupe by path and account

Release Process Note

The initial fix shipped in OpenClaw 2026.3.31 on March 31, 2026. The current published npm release 2026.4.1 from April 1, 2026 also contains follow-up hardening for the same surface.

Thanks @nexrin for reporting.

Record
GHSA-fqrj-m88p-qf3v
CVSS 4.0
2.3 LowCVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N
Weakness
CWE-287
Updated
2026-11-02
NVD 2.3

OpenClaw versions 2026.2.19 before 2026.3.31 contain an improper cache isolation vulnerability in the Zalo webhook replay-dedupe mechanism that is shared across authenticated webhook targets. Attackers controlling one authenticated Zalo webhook path in multi-account deployments can suppress legitimate events on different accounts by matching event_name and message_id parameters.

Record
CVE-2026-41362
CVSS 4.0
2.3 LowCVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
CVSS 3.1
4.3 MediumCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L
Weakness
CWE-668
Updated
2026-11-02
OSV 2.3

OpenClaw 2026.2.19 through 2026.3.30 - Webhook Replay Dedupe Cache Event Suppression via Shared Authentication

OpenClaw versions 2026.2.19 before 2026.3.31 contain an improper cache isolation vulnerability in the Zalo webhook replay-dedupe mechanism that is shared across authenticated webhook targets. Attackers controlling one authenticated Zalo webhook path in multi-account deployments can suppress legitimate events on different accounts by matching event_name and message_id parameters.

Record
CVE-2026-41362
CVSS 4.0
2.3 LowCVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N
Weakness
CWE-668
Updated
2026-11-02
OSVGHSA-fqrj-m88p-qf3v 2.3

OpenClaw: Zalo replay dedupe cache could suppress events across authenticated webhook targets

Summary

Before OpenClaw 2026.3.31, the Zalo webhook replay-dedupe cache was shared across authenticated webhook targets and keyed too broadly. In multi-account deployments, a replay seen on one account could suppress a legitimate event on another account if event_name and message_id matched.

Impact

An attacker who controlled one authenticated Zalo webhook path in a multi-account gateway deployment could cause silent message suppression on a different Zalo account sharing that gateway. This was an availability issue; it did not provide cross-account authentication or data access.

Affected Packages / Versions

  • Package: openclaw (npm)
  • Affected versions: >= 2026.2.19, < 2026.3.31
  • Patched versions: >= 2026.3.31
  • Latest published npm version: 2026.4.1

Fix Commit(s)

  • 4d038bb242c11f39e45f6a4bde400e5fd42e4ebf — scope webhook replay dedupe per target
  • 7cea7c29705b188b464cc9cdc107c275b94b2a72 — follow-up hardening to scope replay dedupe by path and account

Release Process Note

The initial fix shipped in OpenClaw 2026.3.31 on March 31, 2026. The current published npm release 2026.4.1 from April 1, 2026 also contains follow-up hardening for the same surface.

Thanks @nexrin for reporting.

Record
GHSA-fqrj-m88p-qf3v
CVSS 4.0
2.3 LowCVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N
Weakness
CWE-287
Updated
2026-11-02

Affected products

Affected packages

Affected packages
PackageAffectedFixed
openclaw
npm
 2026.2.19 up to 2026.3.31
2026.3.31

History

History
RecordedChangedSources
first indexedCVE List, EUVD, GitHub Advisories, NVD, OSV

Dates are when Every CVE recorded each change. Upstream dates may differ.

In short

CVE-2026-41362 is a low vulnerability (CVSS 2.3) in Openclaw, published April 7, 2026. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.27%, the 19th percentile. Fixed in openclaw 2026.3.31.

References

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