CVE-2026-29609
Received Received - Intake

Denial of Service in OpenClaw fetchWithGuard via Memory Exhaustion

Publication date: 2026-03-05

Last updated on: 2026-03-11

Assigner: VulnCheck

Description
OpenClaw versions prior to 2026.2.14 contain a denial of service vulnerability in the fetchWithGuard function that allocates entire response payloads in memory before enforcing maxBytes limits. Remote attackers can trigger memory exhaustion by serving oversized responses without content-length headers to cause availability loss.

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Meta Information

Published
2026-03-05
Last Modified
2026-03-11
Generated
2026-07-06
AI Q&A
2026-03-06
EPSS Evaluated
2026-07-05
NVD
CVE-2026-29609
EUVD
EUVD-2026-9933

Affected Vendors & Products

Showing 1 associated CPE
Vendor Product Version / Range
openclaw openclaw to 2026.2.14 (exc)

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Exploitability

CWE
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KEV
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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.

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Executive Summary

This vulnerability exists in OpenClaw versions prior to 2026.2.14 within the fetchWithGuard function. The function allocates memory for the entire response payload before applying the maximum byte limits. Because of this, a remote attacker can send oversized responses without content-length headers, causing the system to exhaust its memory resources.

This leads to a denial of service condition by making the system unavailable due to memory exhaustion.

Impact Analysis

The primary impact of this vulnerability is a denial of service (DoS) condition. An attacker can exploit it remotely to cause memory exhaustion on the affected system, leading to loss of availability.

This means that legitimate users may be unable to access services or applications relying on the vulnerable OpenClaw versions, resulting in potential downtime and disruption.

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