# CVE-2026-27524: openclaw — Fixed in 2026.2.21

📦 npm

Not in CISA KEV

# CVE-2026-27524 — openclaw

[Fix: openclaw/openclaw@fbb79d4](https://github.com/openclaw/openclaw/commit/fbb79d4013000552d6a2c23b9613d8b3cb92f6b6)

CVE-2026-27524 is a CWE-1321 vulnerability in openclaw. A fix is available for openclaw — see the affected versions and patch details below.

OpenClaw < 2026.2.21 - Prototype Pollution via Debug Override Path

Also known as[GHSA-62f6-mrcj-v8h5](/vulnerability/GHSA-62f6-mrcj-v8h5)

Published

Mar 18, 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-2026-27524.

## EPSS Exploitation Probability

[via FIRST.org ↗](https://www.first.org/epss/)

0.3%probability of exploitation in next 30 days

Lower Risk+0.01%

Lower risk than most CVEs17th percentile — riskier than 17% of all scored CVEsHighest risk

0.00%0.30%0.61%0.91%0.0%0.3%May 26Sep 26Nov 26

Probability of exploitation in the next 30 days, from [FIRST.org EPSS](https://www.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

`openclaw`npm

2.9Mdownloads / week

## Description

#### Summary

OpenClaw accepted prototype-reserved keys in runtime `/debug set` override object values (`__proto__`, `constructor`, `prototype`).

#### Impact

`/debug` is disabled by default, and exploitation requires an already authorized `/debug set` caller. No unauthenticated vector was identified.

This issue affects runtime in-memory overrides only (non-persistent and cleared on restart/reset). Given the required prior authorization boundary, this is treated as defense-in-depth hardening for command flag evaluation.

#### Affected Packages / Versions

-   Package: `openclaw` (npm)
-   Latest published vulnerable version confirmed: `2026.2.19-2`
-   Vulnerable range: `<= 2026.2.19-2`
-   Patched in planned next release: `2026.2.21`

#### Technical Details

-   Runtime override merges now block reserved prototype keys during deep merge.
-   Runtime override writes now sanitize nested object values to remove reserved prototype keys before storing overrides.
-   Restricted command gates (`bash`, `config`, `debug`) now require own-property boolean flags, preventing inherited prototype values from enabling commands.

#### Fix Commit(s)

-   `fbb79d4013000552d6a2c23b9613d8b3cb92f6b6`

#### Release Process Note

`patched_versions` is pre-set to `2026.2.21` so after the npm release is live, this advisory can be published immediately.

OpenClaw thanks @tdjackey for reporting.

## Affected Packages

1 total 1 fixed

Ecosystem

Package

Vulnerable range

Fix

📦npm

`openclaw` 

all versions

2026.2.21`npm install openclaw@2026.2.21`

## Affected Products

1 product · 1 configurations

Application

`openclaw`openclaw

< 2026.2.21

range

## Detection & mitigation playbook

Open-source dependency

1.  ### 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.
    
2.  ### Fix
    
    Update openclaw to 2026.2.21 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms CVE-2026-27524 is resolved across your whole dependency graph.
    
3.  ### Workarounds
    
    If you can't upgrade right away: gate or disable the affected feature, validate untrusted input at the boundary, and avoid passing attacker-controlled data into the vulnerable path. O3's runtime protection blocks exploitation in production as an interim safeguard until the upgrade lands.
    

## Frequently Asked Questions

\### Summary OpenClaw accepted prototype-reserved keys in runtime \`/debug set\` override object values (\`\_\_proto\_\_\`, \`constructor\`, \`prototype\`). ### Impact \`/debug\` is disabled by default, and exploitation requires an already authorized \`/debug set\` caller. No unauthenticated vector was identified. This issue affects runtime in-memory overrides only (non-persistent and cleared on restart/reset). Given the required prior authorization boundary, this is treated as defense-in-depth hardening for command flag evaluation. ### Affected Packages / Versions - Package: \`openclaw\` (npm) - Latest publi

O3 Security · Impact-Aware SCA

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