by Kastro
Paper/Archive/CVE-2026-58138

CVE-2026-58138

conductor-oss conductor — Orkes Conductor 3.21.21 < 3.30.2 Unauthenticated RCE via GraalVM Script Evaluators

EPSS 9%CVSS 9.8
critical.is priorityof 100
49
CVSS 9.8 (CNA)9.8 / 10 × 3029.4Not in CISA KEV+300.0EPSS percentile 95.3.953 × 2019.1No public exploit+100.0SSVC exploitation: none+100.0
Description · from the CVE record

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.

Affected

ProductAffectedFixed inSource
conductor3.21.21 – < 3.30.23.30.2CNA

Scores by source

VulnCheck (CNA)9.8CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
VulnCheck (CNA)9.3CVSS: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 ADPSSVCExploitation: none · Automatable: yes · Technical impact: total

References

refgithub.com/conductor-oss/conductor/releases/tag/v3.30.2patchgithub.com/conductor-oss/conductor/commit/87a7d96aabbb706d6e84f812b93da5165028d18fpatchgithub.com/conductor-oss/conductor/commit/c691e35e768caeb802c9f06ecdd9674c80081af1refcve.org/CVERecord?id=CVE-2025-26074writeupvulncheck.com/advisories/orkes-conductor-unauthenticated-rce-via-graalvm-script-evaluators