Staging Environment: Content and features may be unstable or change without notice.
Advisory details: github_osv / GHSA-82g8-464f-2mv7
Advisory ID github_osv/GHSA-82g8-464f-2mv7
Aliases CVE-2026-4039
Summary OpenClaw: Skill env override host env injection via applySkillConfigEnvOverrides (defense-in-depth) ### Summary `applySkillConfigEnvOverrides` previously copied `skills.entries.*.env` values into the host `process.env` without applying the host env safety policy. ### Impact In affected versions, dangerous process-level variables such as `NODE_OPTIONS` could be injected when unset, which can influence runtime/child-process behavior. ### Required attacker capability An attacker must be able to modify OpenClaw local state/config (for example `~/.openclaw/openclaw.json`) to set `skills.entries.<skill>.env` or related skill config values. ### Remediation Fixed in `2026.2.21` by sanitizing skill env overrides and blocking dangerous host env keys (including `NODE_OPTIONS`) before applying overrides, with regression tests covering blocked dangerous keys. ## Fix Commit(s) - `8c9f35cdb51692b650ddf05b259ccdd75cc9a83c` Found using [MCPwner](https://github.com/Pigyon/MCPwner)
Status Published
Exploitability 0.5
Weighted Severity 4.6
Risk 2.3
Affected and Fixed Packages Package Details
Introduced and Fixed Package Commit Patches Package Commit Patches Details
Weaknesses (3)
CWE-1341 Multiple Releases of Same Resource or Handle
CWE-94 Improper Control of Generation of Code ('Code Injection')
CWE-15 External Control of System or Configuration Setting
System Score Found at
cvssv4 5.1 https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/02/GHSA-82g8-464f-2mv7/GHSA-82g8-464f-2mv7.json
generic_textual MODERATE
Reference id Reference type URL
https://github.com/openclaw/openclaw
https://github.com/openclaw/openclaw/commit/8c9f35cdb51692b650ddf05b259ccdd75cc9a83c
https://github.com/openclaw/openclaw/releases/tag/v2026.2.21
CVE-2026-4039 https://nvd.nist.gov/vuln/detail/CVE-2026-4039
GHSA-82g8-464f-2mv7 https://github.com/openclaw/openclaw/security/advisories/GHSA-82g8-464f-2mv7
No exploits are available.

No EPSS data available for this advisory.

Patch URL
There are no known patches.
Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:H/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/2026/02/GHSA-82g8-464f-2mv7/GHSA-82g8-464f-2mv7.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

local

physical

low

high

none

present

none

low

high

none

passive

active

high

low

none

high

low

none

high

low

none

high

low

none

high

low

none

high

low

none

Vector: SSVCv2/E:N/A:N/T:P/P:M/B:A/M:M/D:T/2026-03-12T13:10:16Z/

Decision: Track

Source URL: https://github.com/cisagov/vulnrichment/blob/develop/2026/4xxx/CVE-2026-4039.json

Source Advisory: vulnrichment/CVE-2026-4039

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