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

> Remote attackers can execute arbitrary code via the applySkillConfigenvOverrides function in OpenClaw, requiring an upgrade to the latest version.

- **Severity:** Medium 5.3 (`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`)
- **Exploited in the wild:** Not known
- **Login needed:** Any signed-in user
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** Yes
- **Published:** 12 Mar 2026
- **Updated:** 12 Mar 2026
- **Also known as:** GHSA-82g8-464f-2mv7, MINI-hqv2-66gc-g926

## What is CVE-2026-4039?

CVE-2026-4039 is a medium-severity code injection vulnerability in Openclaw Openclaw, published on 12 Mar 2026. Any signed-in user can exploit it over the network, with no action from the victim.

### Official 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.

Weakness: CWE-94 (Improper Control of Generation of Code), CWE-74 (Improper Neutralization of Special Elements in Output Used by a Downstream Component)

## Which versions are affected by CVE-2026-4039?

2 open source packages ship an affected version, including openclaw. It affects 1 product.


| Package | Ecosystem | Affected | Fixed in |
| --- | --- | --- | --- |
| `openclaw` | npm | All versions | 2026.2.21 |
| `openclaw` | npm | All versions | 2026.2.21 |

Products: Openclaw Openclaw.

## How do I fix CVE-2026-4039?

Upgrade openclaw to 2026.2.21 or later.

## Is CVE-2026-4039 being exploited?

There is no known exploitation of CVE-2026-4039 in the wild and no public exploit code.

## Other vulnerabilities in Openclaw Openclaw

- [CVE-2026-28363](https://insights.sbomify.com/CVE-2026-28363/): Security feature bypass in OpenClaw (critical 9.9)
- [CVE-2026-30741](https://insights.sbomify.com/CVE-2026-30741/): Code injection in n/a (critical 9.8)
- [CVE-2026-33579](https://insights.sbomify.com/CVE-2026-33579/): OpenClaw < 2026.3.28 - Privilege Escalation via Missing Caller Scope Validation in Device Pair Approval (critical 9.4)
- [CVE-2026-32922](https://insights.sbomify.com/CVE-2026-32922/): OpenClaw < 2026.3.11 - Privilege Escalation via Unvalidated Scope in device.token.rotate (critical 9.4)
- [CVE-2026-32978](https://insights.sbomify.com/CVE-2026-32978/): OpenClaw < 2026.3.11 - Approval Bypass via Unrecognized Script Runners (critical 9.4)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-4039 and fix it if it is affected.

What it is: CVE-2026-4039 is a medium-severity code injection vulnerability in Openclaw Openclaw, published on 12 Mar 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2026-4039 in the wild and no public exploit code.

Affected packages and fixed versions:
- openclaw (npm): affected all versions; fixed in 2026.2.21
- openclaw (npm): affected all versions; fixed in 2026.2.21

Task:
1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.
2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.
3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.
4. Run the tests and summarise what changed and why.
5. If nothing in the project is affected, say so and change nothing.

Reference: https://insights.sbomify.com/CVE-2026-4039/ (Markdown: https://insights.sbomify.com/CVE-2026-4039/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-4039
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-4039
- OSV: https://osv.dev/vulnerability/CVE-2026-4039

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-4039/
Summaries are generated and may contain mistakes; the official description above is the record.