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CVE-2026-58138

Orkes Conductor 3.21.21 < 3.30.2 Unauthenticated RCE via GraalVM Script Evaluators

Published: Jun 30, 2026Updated: Jul 14, 2026 Sources: CVE List NVDCWE-94
9.8CRITICAL
NVD MITRE
EPSS Score
9.3%
Top 4.9%
CISA KEV
Not in KEV
Exploits
No Known Exploits
Remediation
No Fix Available
Self-Check
Nuclei

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.

In plain language

AI Act now

Orkes Conductor versions 3.21.21 through before 3.30.2 can let an outsider take over the server, so small businesses using it should act now.

Executive summary

Unauthenticated RCE in Orkes Conductor through unsandboxed GraalVM JavaScript or Python evaluators embedded in workflow definitions submitted to the workflow API.

If affected, business impact
Full server takeoverWorkflow tamperingData exposureService disruptionRansomware risk

What to do now

  1. Check whether you run Conductor and identify its installed version.
  2. Upgrade Conductor to version 3.30.2.
  3. Until upgraded, restrict access to the workflow API to trusted internal systems.
  4. Review recent workflow submissions for unfamiliar scripts or commands.
Usually a quick update

CVSS Vector Breakdown

AV:NAC:LPR:NUI:NS:UC:HI:HA:H
Exploitability
AV:NAttack Vector
Network
AC:LAttack Complexity
Low
PR:NPrivileges Required
None
UI:NUser Interaction
None
Scope
S:UScope
Unchanged
Impact
C:HConfidentiality
High
I:HIntegrity
High
A:HAvailability
High
Open in CVSS calculator →

Weaknesses

CWE-94

Affected Products

conductor-oss
conductor

Exploitability

No known exploits, KEV entries, or remediation guidance available for this vulnerability yet.
Is your org exposed to CVE-2026-58138?Discuss checks for your systems with a specialist. Scope agreed before testing. Check my exposure

Attack Graph

Products CVE Techniques Tactics

Click technique nodes for MITRE ATT&CK details · drag to pan · Ctrl/⌘ + scroll to zoom, or go fullscreen.

MITRE ATT&CK

2 techniques
Execution
Initial Access
View detailed technique mapping

References

https://github.com/conductor-oss/conductor/commit/87a7d96aabbb706d6e84f812b93da5165028d18f
github.com
https://github.com/conductor-oss/conductor/commit/c691e35e768caeb802c9f06ecdd9674c80081af1
github.com
https://github.com/conductor-oss/conductor/releases/tag/v3.30.2
github.com
and 2 more references View all →
News mentions
2

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