# CVE-2026-58138: Orkes Conductor 3.21.21 < 3.30.2 Unauthenticated RCE via GraalVM Script Evaluators

> Remote attackers can execute arbitrary OS commands via malicious workflow definitions due to unsandboxed GraalVM evaluators in Orkes Conductor.

- **Severity:** Critical 9.3 (`CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 30 Jun 2026
- **Updated:** 14 Jul 2026
- **Also known as:** GHSA-7x5q-8f6h-rjrc

## What is CVE-2026-58138?

CVE-2026-58138 is a critical code injection vulnerability in conductor-oss conductor, published on 30 Jun 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

Orkes Conductor 3.21.21 before 3.30.2 contains an unauthenticated remote code execution vulnerability that allows remote attackers to execute arbitrary OS commands by submitting inline workflow definitions containing malicious JavaScript or Python expressions to the workflow API endpoint prior to authentication. Attackers can exploit unsandboxed GraalVM evaluators configured with HostAccess.ALL or allowAllAccess(true) through INLINE, LAMBDA, DO_WHILE, and SWITCH task types to invoke arbitrary system commands via Java reflection or direct subprocess calls.

Weakness: CWE-94 (Improper Control of Generation of Code)

## Which versions are affected by CVE-2026-58138?


## How do I fix CVE-2026-58138?

No fix has been published for CVE-2026-58138 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-58138 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-58138 exists.

Public exploit code:

- CVE-2026-58138 (github_poc): https://github.com/0xredash/CVE-2026-58138
- CVE-2026-58138 — Conductor (3.21.21..<3.30.2) unauthenticated RCE via INLINE GraalVM evaluator (HostAccess.ALL). Lab + PoC, verified e2e (root). (github_poc): https://github.com/Ch4120N/CVE-2026-58138
- CVE-2026-58138 — Conductor (3.21.21..<3.30.2) unauthenticated RCE via INLINE GraalVM evaluator (HostAccess.ALL). Lab + PoC, verified e2e (root). (github_poc): https://github.com/BiiTts/CVE-2026-58138-Conductor-Unauth-RCE
- https://github.com/seqra/cve-2026-58138 (github_poc): https://github.com/seqra/cve-2026-58138
- CVE-2026-58138 - Conductor (3.21.21..<3.30.2) unauthenticated RCE via INLINE GraalVM evaluator (github_poc): https://github.com/0xgh057r3c0n/CVE-2026-58138
- https://github.com/Procjevt/CVE-2026-58138 (github_poc): https://github.com/Procjevt/CVE-2026-58138

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-58138 and fix it if it is affected.

What it is: CVE-2026-58138 is a critical code injection vulnerability in conductor-oss conductor, published on 30 Jun 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Exploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-58138 exists.

Affected product: conductor-oss conductor. No package-level version data is available, so check the vendor advisory linked from the reference page.

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-2026-58138/ (Markdown: https://insights.sbomify.com/CVE-2026-58138/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-58138
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-58138
- OSV: https://osv.dev/vulnerability/CVE-2026-58138

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-58138/
Summaries are generated and may contain mistakes; the official description above is the record.