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.

Metrics

Attack Vector Local

Attack Complexity Low

Privileges Required Low

Attack Requirements None

User Interaction None

Vulnerable System Confidentiality Impact None

Vulnerable System Integrity Impact None

Vulnerable System Availability Impact High

Subsequent System Confidentiality Impact None

Subsequent System Integrity Impact None

Subsequent System Availability Impact None

Attack Vector Local

Attack Complexity Low

Privileges Required Low

Scope Unchanged

Confidentiality Impact None

Integrity Impact None

Availability Impact High

User Interaction None

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

No EPSS score available.

Key SSVC decision points have not yet been added.

Affected Vendors & Products

Vendors Products
Openclaw Subscribe
Openclaw Subscribe

No data.

No data.

No data.

Advisories
Source ID Title
Github GHSA Github GHSA GHSA-w2cg-vxx6-5xjg OpenClaw: denial of service through large base64 media files allocating large buffers before limit checks
Fixes

Solution

No solution given by the vendor.

Workaround

No workaround given by the vendor.

References
Link Providers
https://github.com/openclaw/openclaw/commit/31791233d60495725fa012745dde8d6ee69e9595 cve-icon cve-icon
https://github.com/openclaw/openclaw/security/advisories/GHSA-w2cg-vxx6-5xjg cve-icon cve-icon
https://www.vulncheck.com/advisories/openclaw-denial-of-service-via-large-base-media-file-decoding cve-icon cve-icon
History

Thu, 05 Mar 2026 22:45:00 +0000

Type Values Removed Values Added
Metrics cvssV3_1

{'score': 7.5, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H'}

 cvssV3_1

{'score': 5.5, 'vector': 'CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H'}

Thu, 05 Mar 2026 22:15:00 +0000

Type Values Removed Values Added
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.
Title OpenClaw < 2026.2.14 - Denial of Service via Large Base64 Media File Decoding
First Time appeared Openclaw
Openclaw openclaw
Weaknesses CWE-770
CPEs cpe:2.3:a:openclaw:openclaw:*:*:*:*:*:node.js:*:*
Vendors & Products Openclaw
Openclaw openclaw
References
Metrics cvssV3_1

{'score': 7.5, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H'}

cvssV4_0

{'score': 6.8, 'vector': 'CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N'}

Projects

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cve-icon MITRE

Status: PUBLISHED

Assigner: VulnCheck

Published:

Updated: 2026-03-05T22:28:29.648Z

Reserved: 2026-03-04T16:16:15.968Z

Link: CVE-2026-29612

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Received

Published: 2026-03-05T22:16:24.660

Modified: 2026-03-05T23:16:25.783

Link: CVE-2026-29612

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

No data.

Weaknesses