CVE-2026-58138Known exploitationPublic exploitNetwork attack vector

Unauthenticated OS command execution via unsandboxed evaluators

Published Jun 30, 2026 · Updated Jun 30, 2026

Code injection in Orkes Conductor OSS 3.21.21 through 3.30.1 allows remote attackers to execute OS commands through workflow API expressions. ScriptEvaluator and PythonEvaluator build GraalVM contexts with HostAccess.ALL or allowAllAccess(true), exposing Java reflection and subprocess calls to untrusted expressions. The community API accepts workflow registration and execution without authentication by default, so compromise runs with the Conductor server process's privileges.

CVSS severity9.3
Critical
EPSS probability9.26%
Next 30 days · Sep 16, 2026
Known exploitationReported
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Code injection in Orkes Conductor OSS 3.21.21 through 3.30.1 allows remote attackers to execute OS commands through workflow API expressions. ScriptEvaluator and PythonEvaluator build GraalVM contexts with HostAccess.ALL or allowAllAccess(true), exposing Java reflection and subprocess calls to untrusted expressions. The community API accepts workflow registration and execution without authentication by default, so compromise runs with the Conductor server process's privileges.

The record

CVE
CVE-2026-58138
Published
Jun 30, 2026
Updated
Jun 30, 2026
Vendor
Orkes
Product
Conductor OSS
Classifications
CWE-94, T1190
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jun 30, 2026CVE publishedPublication date reported by the CVE source.
  2. Jun 30, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=3.21.21 <3.30.2

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Orkes · Conductor OSSversion=3.21.21 <3.30.2

Published CVSS scores

9.8VulnCheckCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
9.3VulnCheckCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationReported
Public exploitPublished

Weakness, pattern, technique

CWE-94Improper Control of Generation of Code ('Code Injection')
T1190Exploit Public-Facing Application

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Reported exploitation

Technologies

Your stack

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Your stack

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