Vulnerability report

Active exploitation observed Confirmed confidence Not in CISA KEV

CVE-2026-58138

conductor Remote Code Execution

Conductor-oss / conductor · affected before 3.30.2

Watch CVE-2026-58138 Browse KEV feed
Severity
CVSS 9.3 · Critical
Confidence
Confirmed
Exploit status
Observed in sensors
EPSS
14.7%
First observed
25 Jul 2026
Last observed
01 Oct 2026

Decision summary

What security teams need to know first

Direct answers before the deeper technical record.

What it is

CVE-2026-58138 is an unauthenticated vulnerability affecting Conductor-oss conductor. Orkes Conductor 3.21.21 before 3.30.2 contains an unauthenticated remote code execution vulnerability that allows remote attackers...

Is it exploited?

Yes. Previdian sensors observed exploitation attempts with confirmed confidence. Also confirmed by third-party sources.

Who is affected?

Conductor-oss / conductor affected before 3.30.2.

What should we do?

Patch immediately, validate internet-facing exposure, and monitor for matching requests.

Overview

conductor Remote Code Execution

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.

conductor-oss Affected
conductor
Before 3.30.2
View vendor advisory (opens in new tab)
Published
30 Jun 2026
Exploitation Reported
25 Jul 2026
Attack vector
Remote
Complexity
Low
Privileges
None
User interaction
None

Tags

python nuclei_scanner

CVE References

  • CVE Record CVE.org · CVE Record https://www.cve.org/CVERecord?id=CVE-2026-58138
  • Patch Commit (1) github.com · Patch https://github.com/conductor-oss/conductor/commit/87a7d96aabbb706d6e8...
  • Patch Commit (2) github.com · Patch https://github.com/conductor-oss/conductor/commit/c691e35e768caeb802c...
  • Third-Party Advisory — vulncheck.com vulncheck.com · Third-Party Advisory https://www.vulncheck.com/advisories/orkes-conductor-unauthenticated-...
  • Release Notes github.com · Release Notes https://github.com/conductor-oss/conductor/releases/tag/v3.30.2
  • Related CVE cve.org · CVE Record https://www.cve.org/CVERecord?id=CVE-2025-26074

Exploitation evidence

Why Previdian marks this CVE as exploited

Third-party attestation and first-party sensor observation are shown separately so teams can judge the evidence chain.

Exploited in the wild

Previdian

Recorded 25 Jul 2026

Previdian independently recorded this as exploited after first seeing it in honeypot sensors.

Active exploitation observed

Previdian sensor

First observed 25 Jul 2026

Previdian first observed exploitation attempts targeting this vulnerability in our honeypot sensors.

Proof of concept available

GitHub

Recorded 30 Jun 2026

Public scanner or PoC coverage increases practical exploitability.

Known exploited vulnerability sources

Per-source evidence links for KEV attestations are available through the Previdian Pro API.

Learn about Pro API access
Source Added
Previdian Sensors First 2026-07-27 10:20 UTC
The Hacker News 2026-09-19 00:00 UTC

Operational indicators for this CVE are listed under Detection.

Sensor telemetry

First-party evidence of exploitation activity

Previdian sensors recorded exploitation attempts targeting this vulnerability. The cards and chart show volume, unique attackers, and daily activity.

6

Attempts observed

6

Unique attacker IPs

6

Attacker countries

BG · CH · FR · PK · US · YE

6

Sensors observed

CVE-2026-58138 exploitation attempts over the last 79 days

Daily events observed by Previdian sensors

Updated 10 Oct 2026

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24 Jul 9 Aug 25 Aug 10 Sep 10 Oct

First observed 25 Jul 2026 · Last observed 01 Oct 2026

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Detection

Operational artifacts and observed signals

Make the evidence actionable in scanner, SOC, and edge-control workflows.

Observed signals

Request targets
User-Agents
Callback hosts
1
3
0

Request targets and User-Agents available in Pro. Callback host details available in Enterprise.

Virtual patch status

No Previdian virtual patch is currently available. Future rules ship for ModSecurity, Cloudflare, and AWS WAF.

Learn about virtual patches →

Attacker IP Indicators

Attacker IP indicators observed · available in Pro and Enterprise.

Sensor-derived attacker IP indicators are available to Pro and Enterprise accounts under Detection and through the Pro API.

Learn about Pro API access

Scanner Artifacts

Scanner and exploit-framework references linked to this CVE.

Scanner Reference Detected
Nuclei https://github.com/projectdiscovery/nuclei-templates/blob/main/http/cves/2026/CVE-2026-58138.yaml 14 Aug 2026

Risk and context

Severity, weaknesses, and research context

CVSS v4.0

9.3 Critical

Potential damage if exploited. Separate from whether attackers are using it.

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

EPSS

14.7%

Estimated chance of exploitation in the next 30 days. Previdian's warning comes from evidence, not this score.

Weaknesses

Improper Control of Generation of Code ('Code Injection') CWE-94

Recent mention · The Hacker News

Critical Pre-Auth RCE in Orkes Conductor Workflow Platform Exploited in the Wild

A critical vulnerability impacting Orkes Conductor is being actively exploited in the wild, according to Fortinet. The vulnerability in question is CVE-2026-58138 (CVSS v3.1 score: 9.8/CVSS v4 score: 9.3), which relates to a case of unauthenticated remote code...

Read full advisory

All CVSS Scores

CVSS v4.0 9.3 Critical

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

CVSS v3.1 9.8 Critical

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

All Mentions

Recent mention · The Hacker News

Critical Pre-Auth RCE in Orkes Conductor Workflow Platform Exploited in the Wild

The Hacker News · 19 Sep 2026

A critical vulnerability impacting Orkes Conductor is being actively exploited in the wild, according to Fortinet. The vulnerability in question is CVE-2026-58138 (CVSS v3.1 score: 9.8/CVSS v4 score: 9.3), which relates to a case of unauthenticated remote code execution. "Orkes Conductor 3.21.21 before 3.30.2 contains an unauthenticated remote code execution vulnerability that allows remote

Recent mention · FortiGuard Center - Outbreak Alerts

Orkes Conductor Evaluator Remote Code Execution

FortiGuard Center - Outbreak Alerts · 15 Sep 2026

Attackers are actively targeting Orkes Conductor servers vulnerable to CVE-2026-58138, a critical unauthenticated remote code execution vulnerability in its GraalVM script evaluators. FortiGuard telemetry is observing active attack attempts targeting vulnerable Orkes Conductor deployments. The vulnerability allows an unauthenticated attacker to submit a malicious workflow definition containing JavaScript or Python expressions to the Conductor workflow API. Because vulnerable evaluators can be configured with unrestricted host access, the attacker can escape the intended scripting...

Potential Proof of Concepts

These PoCs are unverified and could contain malware. Use at your own risk.

Ez4rd1x1/CVE-2026-58138-Research

github · Created 2026-10-01 06:32:16 UTC · 0 stars · AI assessment 90%

critical-severity unauthenticated Remote Code Execution (RCE) vulnerability impacting Orkes Conductor

0xBlackash/CVE-2026-58138

github · Created 2026-09-05 17:16:07 UTC · 1 stars · AI assessment 90%

CVE-2026-58138

Orkes Conductor 3.21.21-3.30.1 - Remote Code Execution

nuclei · Created Unknown

Timeline

From disclosure to observed exploitation

  1. 00:00 UTC

    KEV confirmed by The Hacker News

    Exploitation attested by an external source

  2. 04:31 UTC

    Public PoC available

    Public proof-of-concept code published

  3. 04:31 UTC

    Nuclei template available

    Scanner coverage available

  4. 12:51 UTC

    Indicators of compromise added (6)

    Indicators of compromise recorded

  5. 12:51 UTC

    Observed by Previdian sensors

    Evidence-backed exploitation signal

  6. 18:44 UTC

    CVE published

    Vulnerability disclosed publicly

  7. 14:13 UTC

    CVE ID reserved

    Identifier reserved by the CNA

Pro API

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Confidence, exploit status, sensor telemetry, PoCs, scanner integrations, mentions, and tags are available programmatically for VM, SOC, and CTI workflows.

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  • Evidence confidence and provenance
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GET /api/v2/pro/kevs/CVE-2026-58138

Free JSON includes basic KEV fields 
{
  "cve_id": "CVE-2026-58138",
  "confidence": "Confirmed",
  "cvss_score": 9.3,
  "cvss_estimated": false,
  "epss_score": 0.14687,
  "exploit_status": {
    "exploited_in_the_wild": true,
    "active_exploitation_observed": true
  },
  "sensor_telemetry": { "attempts": 6, "sensors": 6 }
}