OpenClaw up to 2026.4.1 incomplete blacklist

CVSS Meta Temp Score
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CTI Interest Score
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7.0$0-$5k0.87

Summaryinfo

A vulnerability was found in OpenClaw up to 2026.4.1. It has been classified as critical. Affected by this issue is some unknown functionality. This manipulation causes incomplete blacklist. This vulnerability appears as CVE-2026-53855. The attack may be initiated remotely. There is no available exploit. Upgrading the affected component is recommended.

Detailsinfo

A vulnerability was found in OpenClaw up to 2026.4.1. It has been declared as critical. Affected by this vulnerability is an unknown code block. The manipulation with an unknown input leads to a incomplete blacklist vulnerability. The CWE definition for the vulnerability is CWE-184. The product implements a protection mechanism that relies on a list of inputs (or properties of inputs) that are not allowed by policy or otherwise require other action to neutralize before additional processing takes place, but the list is incomplete, leading to resultant weaknesses. As an impact it is known to affect confidentiality, integrity, and availability. The summary by CVE is:

OpenClaw before 2026.4.2 contains an inline-eval bypass vulnerability allowing authenticated operators to weaken strict allowlist checks via shell positional parameters. Attackers can combine allowlisted tools with shell positional arguments to place inline-eval content in shell carriers outside intended allowlist rules, enabling execution of unapproved shell-provided content.

The weakness was presented by Ellahi as GHSA-5cj2-3jr2-5h77. It is possible to read the advisory at github.com. This vulnerability is known as CVE-2026-53855 since 06/10/2026. The exploitation appears to be easy. The attack can be launched remotely. The technical details are unknown and an exploit is not publicly available. The attack technique deployed by this issue is T1562.006 according to MITRE ATT&CK.

Upgrading to version 2026.4.2 eliminates this vulnerability.

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Productinfo

Type

Name

Version

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: 7.2
VulDB Meta Temp Score: 7.0

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

CNA Base Score: 8.1
CNA Vector (VulnCheck): 🔒

CVSSv2info

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

Exploitinginfo

Class: Incomplete blacklist
CWE: CWE-184 / CWE-183 / CWE-20
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 2026.4.2

Timelineinfo

06/10/2026 CVE reserved
06/16/2026 +6 days Advisory disclosed
06/16/2026 +0 days VulDB entry created
06/16/2026 +0 days VulDB entry last update

Sourcesinfo

Product: github.com

Advisory: GHSA-5cj2-3jr2-5h77
Researcher: Ellahi
Status: Confirmed

CVE: CVE-2026-53855 (🔒)
GCVE (CVE): GCVE-0-2026-53855
GCVE (VulDB): GCVE-100-371383

Entryinfo

Created: 06/16/2026 21:42
Changes: 06/16/2026 21:42 (77)
Complete: 🔍
Cache ID: 216::103

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