CVE-2026-35633

Received Received - Intake

Unbounded Memory Allocation in OpenClaw Remote Media HTTP Handling

Publication date: 2026-04-09

Last updated on: 2026-04-15

Assigner: VulnCheck

Description

OpenClaw before 2026.3.22 contains an unbounded memory allocation vulnerability in remote media HTTP error handling that allows attackers to trigger excessive memory consumption. Attackers can send crafted HTTP error responses with large bodies to remote media endpoints, causing the application to allocate unbounded memory before failure handling occurs.

CVSS Scores

EPSS Scores

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Meta Information

Published

2026-04-09

Last Modified

2026-04-15

Generated

2026-07-06

AI Q&A

2026-04-10

EPSS Evaluated

2026-07-05

NVD

CVE-2026-35633

EUVD

EUVD-2026-21122

Affected Vendors & Products

Vendor	Product	Version / Range
openclaw	openclaw	to 2026.3.22 (exc)

Helpful Resources

Exploitability

CWE

KEV

CWE ID	Description
CWE-770	The product allocates a reusable resource or group of resources on behalf of an actor without imposing any intended restrictions on the size or number of resources that can be allocated.
CWE-789	The product allocates memory based on an untrusted, large size value, but it does not ensure that the size is within expected limits, allowing arbitrary amounts of memory to be allocated.

Attack-Flow Graph

Executive Summary

This vulnerability exists in OpenClaw versions before 2026.3.22 and involves unbounded memory allocation during remote media HTTP error handling.

Attackers can exploit this by sending specially crafted HTTP error responses with very large bodies to remote media endpoints.

As a result, the application allocates excessive amounts of memory before it can handle the failure, potentially leading to resource exhaustion.

Impact Analysis

The primary impact of this vulnerability is excessive memory consumption caused by the application when processing crafted HTTP error responses.

This can lead to application instability or crashes due to resource exhaustion, potentially resulting in denial of service.

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