How severe is CVE-2026-29609?

No CVSS score has been assigned to CVE-2026-29609 yet. Review the advisory details and affected package list to assess your exposure.

Which packages are affected by CVE-2026-29609?

CVE-2026-29609 affects the following packages: openclaw (npm). Ecosystems affected: npm.

How do I fix CVE-2026-29609?

Update openclaw to 2026.2.14 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms CVE-2026-29609 is resolved across your whole dependency graph.

How do I detect CVE-2026-29609 in my npm dependencies?

Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for openclaw, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.

How do I mitigate CVE-2026-29609 if there is no patch (or I can't update yet)?

Cap what an attacker can consume: apply request size, rate and timeout limits in front of the affected component, and run it with memory and CPU limits so exhaustion degrades one worker rather than the whole service.

Is CVE-2026-29609 actively exploited in the wild?

No public exploit code has been indexed for CVE-2026-29609 yet. This does not mean the vulnerability cannot be exploited — absence of public exploits does not imply safety. Apply the recommended fix and use O3 Security to monitor your exposure.

What is the EPSS score for CVE-2026-29609?

CVE-2026-29609 has an EPSS (Exploit Prediction Scoring System) score of 0.5%, placing it in the 42th percentile of all CVEs. EPSS is maintained by FIRST.org and estimates the probability that a vulnerability will be exploited in the wild within the next 30 days. This score indicates relatively lower exploitation probability, though the CVSS severity should still guide your patching priority.

What type of vulnerability is CVE-2026-29609?

CVE-2026-29609 is classified as CWE-770 (CWE-770). This weakness type describe the underlying flaw category, which helps determine the potential impact and the right class of mitigation.

When was CVE-2026-29609 published, and has it been updated?

CVE-2026-29609 was published on March 5, 2026 and was last updated on October 28, 2026. Advisory data evolves as severity scores, affected ranges, and exploit intelligence are revised — always check the latest version of the advisory before acting.

📦 npm

Not in CISA KEV

CVE-2026-29609 — openclaw

Fix: openclaw/openclaw@00a0890

CVE-2026-29609 is a CWE-770 vulnerability in openclaw. A fix is available for openclaw — see the affected versions and patch details below.

OpenClaw < 2026.2.14 - Denial of Service via Unbounded URL-backed Media Fetch

Also known asGHSA-j27p-hq53-9wgc

Published

Mar 5, 2026

Updated

Oct 28, 2026

Affected

1 pkg

Patched

1 / 1

Exploits

None indexed

Exploitation data as of Nov 10, 2026 · OSV.dev, NVD, FIRST.org (EPSS)

Exploitation Status

No confirmed exploitation observed yet

CISA assesses this as automatable — exploitation doesn’t require manual, per-target effort, which raises the odds of mass scanning and opportunistic attacks.
CISA’s own triage has not observed active exploitation or public proof-of-concept code for this CVE as of its last assessment.

Exploitation and automatability from CISA’s SSVC triage for CVE-2026-29609.

EPSS Exploitation Probability

via FIRST.org ↗

0.5%probability of exploitation in next 30 days

Lower Risk0.00%

Lower risk than most CVEs42th percentile — riskier than 42% of all scored CVEsHighest risk

Probability of exploitation in the next 30 days, from FIRST.org EPSS.

Real-World Exposure

1 pkg affected

How broadly this vulnerability is actually deployed: weekly install volume shows current usage, and reverse-dependency count shows how many other packages break if it stays unpatched.

133other npm packages depend on this — each one inherits the vulnerability until it's patched upstream

openclawnpm

2.9Mdownloads / week

Description

Summary

URL-backed media fetch handling allocated the entire response payload in memory (arrayBuffer) before enforcing maxBytes, allowing oversized responses to cause memory exhaustion.

Affected Versions

openclaw (npm): < 2026.2.14
clawdbot (npm): <= 2026.1.24-3

Patched Versions

openclaw (npm): 2026.2.14

Fix Commit

openclaw/openclaw main: 00a08908892d1743d1fc52e5cbd9499dd5da2fe0

Details

Affected component:

src/media/input-files.ts (fetchWithGuard)

When content-length is missing or incorrect, reading the body via response.arrayBuffer() buffers the full payload before a size check can run.

Proof of Concept

Configure URL-based media input.
Serve a response larger than maxBytes (chunked transfer / no content-length).
Trigger the fetchWithGuard URL fetch path.

Example local server (large response):

node -e 'require("http").createServer((_,res)=>{res.writeHead(200,{"content-type":"application/octet-stream"});for(let i=0;i<1024;i++)res.write(Buffer.alloc(1024*64));res.end();}).listen(18888)'

Impact

Availability loss via memory pressure from attacker-controlled remote media responses.

Mitigation

Until a patched release is available, disable URL-backed media inputs (or restrict to a tight hostname allowlist) and use conservative maxBytes limits.

Credits

Reported by @vincentkoc.

Affected Packages

1 total 1 fixed

Ecosystem	Package	Vulnerable range	Fix
📦npm	`openclaw`	all versions	2026.2.14`npm install openclaw@2026.2.14`

Affected Products

1 product · 1 configurations

Application

openclawopenclaw

< 2026.2.14

range

Detection & mitigation playbook

Open-source dependency

Detect
Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for openclaw, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.
Fix
Update openclaw to 2026.2.14 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms CVE-2026-29609 is resolved across your whole dependency graph.
Workarounds
Cap what an attacker can consume: apply request size, rate and timeout limits in front of the affected component, and run it with memory and CPU limits so exhaustion degrades one worker rather than the whole service.

Frequently Asked Questions

### Summary URL-backed media fetch handling allocated the entire response payload in memory (`arrayBuffer`) before enforcing `maxBytes`, allowing oversized responses to cause memory exhaustion. ### Affected Versions - `openclaw` (npm): < `2026.2.14` - `clawdbot` (npm): <= `2026.1.24-3` ### Patched Versions - `openclaw` (npm): `2026.2.14` ### Fix Commit - `openclaw/openclaw` `main`: `00a08908892d1743d1fc52e5cbd9499dd5da2fe0` ### Details Affected component: - `src/media/input-files.ts` (`fetchWithGuard`) When `content-length` is missing or incorrect, reading the body via `response.arrayBuff

O3 Security · Impact-Aware SCA

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