CVE-2026-58138: critical vulnerability in conductor-oss conductor
Orkes Conductor 3.21.21 < 3.30.2 Unauthenticated RCE via GraalVM Script Evaluators
Published · Updated
90Vexday Risk Score
Patch now. It exploitation observed by VulnCheck and has a working public exploit.
ssvc Actcvss 9.3epss 15%
from disclosure to weapon0 days
Published on NVDJun 30
1st PoCJun 30
VulnCheck+27d
exploitation probability
15%top 3% of all CVEs
observed exploitation
yesVulnCheck
14 public exploit(s)
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.
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
Affected products
conductor-oss · conductorpublic PoCs found — 14
exploitdbwww.exploit-db.com/exploits/52633unverifiedgithubgithub.com/0xBlackash/CVE-2026-58138★ 3githubgithub.com/Ch4120N/CVE-2026-58138★ 2githubgithub.com/Ez4rd1x1/CVE-2026-58138-Research★ 0githubgithub.com/0xgh057r3c0n/CVE-2026-58138★ 0githubgithub.com/seqra/cve-2026-58138★ 0githubgithub.com/BiiTts/CVE-2026-58138-Conductor-Unauth-RCE★ 0githubgithub.com/Procjevt/CVE-2026-58138★ 0vulncheckvulncheck.com/xdb/c26aee61c022unverifiedvulncheckvulncheck.com/xdb/4f99706cfc74unverifiedvulncheckvulncheck.com/xdb/0eb9ba83a244unverifiedvulncheckvulncheck.com/xdb/eb7362a14121unverifiedvulncheckvulncheck.com/xdb/17e059b66c88unverifiedvulncheckvulncheck.com/xdb/06cfaea3bf99unverified⚠ Public resources, to assess the exposure of systems you control or are authorized to test. Test only with authorization.
Related CVEs — conductor-oss conductor
In the same product, most dangerous first.
CVE-2026-109405MEDIUMconductor-oss conductor KafkaPublishTask.java KafkaPublishTask.start server-side request forgeryEPSS —CVE-2026-109404MEDIUMconductor-oss conductor Agentspan Agent Runtime AgentController.java server-side request forgeryEPSS —CVE-2026-109403MEDIUMconductor-oss conductor Agent Card Fetching A2AService.java A2AService.getAgentCard server-side request forgeryEPSS —CVE-2026-109402MEDIUMconductor-oss conductor MCP Service MCPService.java MCPService.listTools server-side request forgeryEPSS —CVE-2026-109190MEDIUMconductor-oss conductor API Tool Configuration ListApiToolsTask.java ListApiToolsTask.start server-side request forgeryEPSS —
References
https://github.com/conductor-oss/conductor/commit/87a7d96aabbb706d6e84f812b93da5165028d18fhttps://github.com/conductor-oss/conductor/commit/c691e35e768caeb802c9f06ecdd9674c80081af1https://github.com/conductor-oss/conductor/releases/tag/v3.30.2https://www.cve.org/CVERecord?id=CVE-2025-26074https://www.vulncheck.com/advisories/orkes-conductor-unauthenticated-rce-via-graalvm-script-evaluators