CVE-2026-29612
Received Received - Intake

Memory Allocation DoS via Base64 Decoding in OpenClaw

Publication date: 2026-03-05

Last updated on: 2026-03-11

Assigner: VulnCheck

Description
OpenClaw versions prior to 2026.2.14 decode base64-backed media inputs into buffers before enforcing decoded-size budget limits, allowing attackers to trigger large memory allocations. Remote attackers can supply oversized base64 payloads to cause memory pressure and denial of service.

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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-2026-29612
EUVD
EUVD-2026-9936

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. The software decodes base64-backed media inputs into buffers before it enforces limits on the decoded size. Because of this, attackers can supply oversized base64 payloads that cause the program to allocate large amounts of memory.

This can lead to excessive memory usage, which can degrade system performance or cause the application to crash.

Impact Analysis

The primary impact of this vulnerability is a denial of service (DoS). Remote attackers can exploit it by sending oversized base64 payloads that cause large memory allocations, leading to memory pressure.

This memory pressure can slow down or crash the affected system or application, disrupting normal operations.

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