OpenClaw up to 2026.3.0 Zalo Webhook Endpoint allocation of resources

CVSS Meta Temp Score
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CTI Interest Score
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6.3$0-$5k0.00

Summaryinfo

A vulnerability described as problematic has been identified in OpenClaw up to 2026.3.0. This affects an unknown part of the component Zalo Webhook Endpoint. Such manipulation leads to allocation of resources. This vulnerability is referenced as CVE-2026-28461. It is possible to launch the attack remotely. No exploit is available. Upgrading the affected component is recommended.

Detailsinfo

A vulnerability, which was classified as problematic, has been found in OpenClaw up to 2026.3.0. Affected by this issue is an unknown code block of the component Zalo Webhook Endpoint. The manipulation with an unknown input leads to a allocation of resources vulnerability. Using CWE to declare the problem leads to CWE-770. The product allocates a reusable resource or group of resources on behalf of an actor without imposing any restrictions on the size or number of resources that can be allocated, in violation of the intended security policy for that actor. Impacted is availability. CVE summarizes:

OpenClaw versions prior to 2026.3.1 contain an unbounded memory growth vulnerability in the Zalo webhook endpoint that allows unauthenticated attackers to trigger in-memory key accumulation by varying query strings. Remote attackers can exploit this by sending repeated requests with different query parameters to cause memory pressure, process instability, or out-of-memory conditions that degrade service availability.

The advisory is available at github.com. This vulnerability is handled as CVE-2026-28461 since 02/27/2026. The exploitation is known to be easy. The attack may be launched remotely. No form of authentication is required for exploitation. The technical details are unknown and an exploit is not available. This vulnerability is assigned to T1499 by the MITRE ATT&CK project.

Upgrading to version 2026.3.1 eliminates this vulnerability.

The vulnerability is also documented in the vulnerability database at CERT Bund (WID-SEC-2026-0557). If you want to get best quality of vulnerability data, you may have to visit VulDB.

Affected

  • Open Source OpenClaw

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: 6.4
VulDB Meta Temp Score: 6.3

VulDB Base Score: 5.3
VulDB Temp Score: 5.1
VulDB Vector: 🔒
VulDB Reliability: 🔍

CNA Base Score: 7.5
CNA Vector (VulnCheck): 🔒

CVSSv2info

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

Exploitinginfo

Class: Allocation of resources
CWE: CWE-770 / CWE-400 / CWE-404
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 2026.3.1

Timelineinfo

02/27/2026 CVE reserved
03/19/2026 +20 days Advisory disclosed
03/19/2026 +0 days VulDB entry created
03/23/2026 +4 days VulDB entry last update

Sourcesinfo

Product: github.com

Advisory: GHSA-wr6m-jg37-68xh
Status: Confirmed

CVE: CVE-2026-28461 (🔒)
GCVE (CVE): GCVE-0-2026-28461
GCVE (VulDB): GCVE-100-351650
CERT Bund: WID-SEC-2026-0557 - OpenClaw: Mehrere Schwachstellen

Entryinfo

Created: 03/19/2026 07:14
Updated: 03/23/2026 22:36
Changes: 03/19/2026 07:14 (76), 03/20/2026 11:26 (7), 03/23/2026 22:36 (1)
Complete: 🔍
Cache ID: 216::103

If you want to get best quality of vulnerability data, you may have to visit VulDB.

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