Staging Environment: Content and features may be unstable or change without notice.
Advisory details: github_osv / GHSA-62f6-mrcj-v8h5
Advisory ID github_osv/GHSA-62f6-mrcj-v8h5
Aliases CVE-2026-27524
Summary OpenClaw's runtime /debug override path accepted prototype-reserved keys ### 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.
Status Published
Exploitability 0.5
Weighted Severity 1.8
Risk 0.9
Affected and Fixed Packages Package Details
Introduced and Fixed Package Commit Patches Package Commit Patches Details
Weaknesses (1)
CWE-1321 Improperly Controlled Modification of Object Prototype Attributes ('Prototype Pollution')
System Score Found at
cvssv4 2.0 https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/03/GHSA-62f6-mrcj-v8h5/GHSA-62f6-mrcj-v8h5.json
generic_textual LOW
Reference id Reference type URL
https://github.com/openclaw/openclaw
CVE-2026-27524 https://nvd.nist.gov/vuln/detail/CVE-2026-27524
fbb79d4013000552d6a2c23b9613d8b3cb92f6b6 Other https://github.com/openclaw/openclaw/commit/fbb79d4013000552d6a2c23b9613d8b3cb92f6b6
GHSA-62f6-mrcj-v8h5 Advisory https://github.com/openclaw/openclaw/security/advisories/GHSA-62f6-mrcj-v8h5
openclaw-prototype-pollution-via-debug-override-path Advisory https://www.vulncheck.com/advisories/openclaw-prototype-pollution-via-debug-override-path
No exploits are available.

No EPSS data available for this advisory.

Patch URL
There are no known patches.
Vector: CVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N Found at https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/03/GHSA-62f6-mrcj-v8h5/GHSA-62f6-mrcj-v8h5.json
Attack Vector (AV) Attack Complexity (AC) Attack Requirements (AT) Privileges Required (PR) User Interaction (UI) Vulnerable System Impact Confidentiality (VC) Vulnerable System Impact Integrity (VI) Vulnerable System Impact Availability (VA) Subsequent System Impact Confidentiality (SC) Subsequent System Impact Integrity (SI) Subsequent System Impact Availability (SA)

network

adjacent

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present

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passive

active

high

low

none

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low

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Vector: SSVCv2/E:N/A:N/T:P/P:M/B:A/M:M/D:T/2026-03-18T14:03:02Z/

Decision: Track

Source URL: https://github.com/cisagov/vulnrichment/blob/develop/2026/27xxx/CVE-2026-27524.json

Source Advisory: vulnrichment/CVE-2026-27524

View SSVC decision tree 
[{'Exploitation': 'none'},
 {'Automatable': 'no'},
 {'Technical Impact': 'partial'},
 {'Mission Prevalence': 'minimal'},
 {'Public Well-being Impact': 'material'},
 {'Mission & Well-being': 'medium'}]