OpenClaw: denial of service through large base64 media files allocating large buffers before limit checks
Summary
Base64-backed media inputs could be decoded into Buffers before enforcing decoded-size budgets. An attacker supplying oversized base64 payloads can force large allocations, causing memory pressure and denial of service.
Attack Scenario Notes
- Recommended deployments bind the gateway to loopback by default and require gateway auth for HTTP endpoints. In that configuration, this is best modeled as a local/authorized DoS.
- If an operator exposes the gateway to untrusted networks (or disables/weakens auth and rate limits), treat this as a higher-severity network DoS risk.
Affected Packages / Versions
- openclaw (npm): <= 2026.2.13
- clawdbot (npm): <= 2026.1.24-3
Fixed In
- openclaw (npm): 2026.2.14 (planned)
- clawdbot (npm): no patched release planned; migrate to openclaw
Fix Commit(s)
- 31791233d60495725fa012745dde8d6ee69e9595
Credits
Thanks @vincentkoc for reporting.
Affected software
Click a technology to see all vulnerabilities affecting it.
| Platform | Package | Vulnerable versions | Fixed in |
|---|---|---|---|
| npm package | clawdbot | <= 2026.1.24-3 | no fix |
| npm package | openclaw | < 2026.2.14 | 2026.2.14 |
References
- https://github.com/openclaw/openclaw/security/advisories/GHSA-w2cg-vxx6-5xjg
- https://nvd.nist.gov/vuln/detail/CVE-2026-29612
- https://github.com/openclaw/openclaw/commit/31791233d60495725fa012745dde8d6ee69e9595
- https://github.com/openclaw/openclaw
- https://github.com/openclaw/openclaw/releases/tag/v2026.2.14
- https://www.vulncheck.com/advisories/openclaw-denial-of-service-via-large-base-media-file-decoding
- CVSS vector
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H- Weakness (CWE)
CWE-400, CWE-770- Platform
- npm
- Package
clawdbot, openclaw- Disclosed
- 18.02.2026
- Updated
- 11.10.2026 10:22
Sources and licenses
OSV / GitHub Advisory Database - GHSA-w2cg-vxx6-5xjg - CC BY 4.0
Vulnerability history: openclaw
All published vulnerabilities of this package (npm package), newest first. Shows whether this is a one-off slip or a package that needs watching.
- Total entries
- 588
- First → latest
- 02.2026 07.2026
- Without a fix
- 9
- Exploited in attacks
- 0
Severity breakdown
- Critical 20
- High 215
- Medium 299
- Low 54
Disclosures per year
- 2026: 588
-
OpenClaw: denial of service through large base64 media files allocating large buffers before limit checks this entry
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