How severe is CVE-2026-41408?

No CVSS score has been assigned to CVE-2026-41408 yet. Review the advisory details and affected package list to assess your exposure.

Which packages are affected by CVE-2026-41408?

CVE-2026-41408 affects the following packages: openclaw (npm). Ecosystems affected: npm.

How do I fix CVE-2026-41408?

Update openclaw to 2026.3.31 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms CVE-2026-41408 is resolved across your whole dependency graph.

How do I detect CVE-2026-41408 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-2026-41408 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-2026-41408 actively exploited in the wild?

No public exploit code has been indexed for CVE-2026-41408 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-2026-41408?

CVE-2026-41408 has an EPSS (Exploit Prediction Scoring System) score of 0.3%, placing it in the 28th 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-2026-41408?

CVE-2026-41408 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-2026-41408 published, and has it been updated?

CVE-2026-41408 was published on April 28, 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-2026-41408 — openclaw

Fix: openclaw/openclaw@2194587

CVE-2026-41408 is a CWE-770 vulnerability in openclaw. A fix is available for openclaw — see the affected versions and patch details below.

OpenClaw < 2026.3.31 - Disk Exhaustion via Media Download Bypass

Also known asGHSA-4g5x-2jfc-xm98

Published

Apr 28, 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’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-2026-41408.

EPSS Exploitation Probability

via FIRST.org ↗

0.3%probability of exploitation in next 30 days

Lower Risk0.00%

Lower risk than most CVEs28th percentile — riskier than 28% 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

Tlon media downloads can bypass core safety limits and exhaust disk

Current Maintainer Triage

Status: narrow
Normalized severity: low
Assessment: Shipped v2026.3.28 Tlon media downloads bypassed core size/count/cleanup limits, but this is availability-only resource exhaustion in a bundled plugin path, so low.

Affected Packages / Versions

Package: openclaw (npm)
Latest published npm version: 2026.3.31
Vulnerable version range: <=2026.3.28
Patched versions: >= 2026.3.31
First stable tag containing the fix: v2026.3.31

Fix Commit(s)

2194587d70d2aef863508b945319c5a7c88b12ce — 2026-03-31T19:40:15+09:00

Release Process Note

The fix is already present in released version 2026.3.31.
This draft looks ready for final maintainer disposition or publication, not additional code-fix work.

Thanks @AntAISecurityLab for reporting.

Affected Packages

1 total 1 fixed

Ecosystem	Package	Vulnerable range	Fix
📦npm	`openclaw`	all versions	2026.3.31`npm install openclaw@2026.3.31`

Affected Products

1 product · 1 configurations

Application

openclawopenclaw

< 2026.3.31

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 2026.3.31 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms CVE-2026-41408 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 Tlon media downloads can bypass core safety limits and exhaust disk ## Current Maintainer Triage - Status: narrow - Normalized severity: low - Assessment: Shipped v2026.3.28 Tlon media downloads bypassed core size/count/cleanup limits, but this is availability-only resource exhaustion in a bundled plugin path, so low. ## Affected Packages / Versions - Package: `openclaw` (npm) - Latest published npm version: `2026.3.31` - Vulnerable version range: `<=2026.3.28` - Patched versions: `>= 2026.3.31` - First stable tag containing the fix: `v2026.3.31` ## Fix Commit(s) - `2194587d70d2a

O3 Security · Impact-Aware SCA

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