OpenClaw up to 2026.4.7 Websocket Connection session expiration

CVSS Meta Temp Score
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CTI Interest Score
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5.7$0-$5k0.00

Summaryinfo

A vulnerability was found in OpenClaw up to 2026.4.7. It has been classified as critical. Affected is an unknown function of the component Websocket Connection Handler. The manipulation leads to session expiration. This vulnerability is traded as CVE-2026-42421. It is possible to initiate the attack remotely. There is no exploit available. Upgrading the affected component is recommended.

Detailsinfo

A vulnerability, which was classified as critical, has been found in OpenClaw up to 2026.4.7. This issue affects an unknown code block of the component Websocket Connection Handler. The manipulation with an unknown input leads to a session expiration vulnerability. Using CWE to declare the problem leads to CWE-613. According to WASC, "Insufficient Session Expiration is when a web site permits an attacker to reuse old session credentials or session IDs for authorization." Impacted is confidentiality, integrity, and availability. The summary by CVE is:

OpenClaw before 2026.4.8 contains a session management vulnerability where existing WebSocket sessions survive shared gateway token rotation. Attackers can maintain unauthorized access to WebSocket connections after token rotation by exploiting the failure to disconnect existing shared-token sessions.

The advisory is shared at github.com. The identification of this vulnerability is CVE-2026-42421 since 04/27/2026. The exploitation is known to be easy. The attack may be initiated remotely. Neither technical details nor an exploit are publicly available.

Upgrading to version 2026.4.8 eliminates this vulnerability. Applying the patch d7c3210cd6f5fdfdc1beff4c9541673e814354d5 is able to eliminate this problem. The bugfix is ready for download at github.com. The best possible mitigation is suggested to be upgrading to the latest version.

The vulnerability is also documented in the vulnerability database at EUVD (EUVD-2026-26124). If you want to get the best quality for vulnerability data then you always have to consider VulDB.

Productinfo

Type

Name

Version

License

Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CNA CVSS-B Score: 🔒
CNA CVSS-BT Score: 🔒
CNA Vector: 🔒

CVSSv3info

VulDB Meta Base Score: 5.9
VulDB Meta Temp Score: 5.7

VulDB Base Score: 6.3
VulDB Temp Score: 6.0
VulDB Vector: 🔒
VulDB Reliability: 🔍

CNA Base Score: 5.4
CNA Vector (VulnCheck): 🔒

CVSSv2info

AVACAuCIA
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Session expiration
CWE: CWE-613
CAPEC: 🔒
ATT&CK: 🔒

Physical: No
Local: No
Remote: Yes

Availability: 🔒
Status: Not defined

EPSS Score: 🔒
EPSS Percentile: 🔒

Price Prediction: 🔍
Current Price Estimation: 🔒

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Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔒

Upgrade: OpenClaw 2026.4.8
Patch: d7c3210cd6f5fdfdc1beff4c9541673e814354d5

Timelineinfo

04/27/2026 CVE reserved
04/28/2026 +1 days Advisory disclosed
04/28/2026 +0 days VulDB entry created
04/29/2026 +1 days VulDB entry last update

Sourcesinfo

Product: github.com

Advisory: GHSA-5h3f-885m-v22w
Status: Confirmed

CVE: CVE-2026-42421 (🔒)
GCVE (CVE): GCVE-0-2026-42421
GCVE (VulDB): GCVE-100-360029
EUVD: 🔒

Entryinfo

Created: 04/28/2026 21:59
Updated: 04/29/2026 04:42
Changes: 04/28/2026 21:59 (78), 04/29/2026 04:42 (1)
Complete: 🔍
Cache ID: 216::103

If you want to get the best quality for vulnerability data then you always have to consider VulDB.

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