seqra/cve-2026-58138Reproduction kit for CVE-2026-58138, an unauthenticated RCE in Conductor. Includes OpenTaint static analysis rules, isolated tests, SARIF results, and a working Python exploit for GraalVM code injection.
Reproduction kit for CVE-2026-58138, a CVSS 9.8 code-injection vulnerability in Conductor. It contains the OpenTaint rule and GraalVM approximations, isolated rule tests, the scan result, and a working exploit.
The scan targets Conductor v3.23.0 and reports two findings from unauthenticated workflow input to full-host-access GraalVM evaluators. Each finding contains four HTTP entry-point flows:
core/src/main/java/com/netflix/conductor/core/events/ScriptEvaluator.java:203core/src/main/java/com/netflix/conductor/core/execution/evaluators/PythonEvaluator.java:63.opentaint/rules/ - the join rule and full-host-access sinkContext.eval.opentaint/model/config/ - passthrough models for GraalVM fluent builders.opentaint/test-projects/ - 15 positive and negative rule samplesresults/report.sarif - the reproduced OpenTaint findingspoc/poc_inline_lambda_rce.py - the live exploitRequires OpenTaint and JDK 21.
opentaint compile \
.opentaint/test-projects/graaljs-polyglot-code-injection \
--output /tmp/conductor-rule-model
opentaint test rule run /tmp/conductor-rule-model \
--ruleset .opentaint/rules \
--passthrough-approximations .opentaint/model/config
Expected result: Passed: 15, failed: 0.
git clone --depth 1 --branch v3.23.0 \
https://github.com/conductor-oss/conductor.git conductor
opentaint scan ./conductor \
--ruleset builtin \
--ruleset .opentaint/rules \
--rule-id java/security/graaljs-polyglot-code-injection.yaml:graaljs-polyglot-code-injection \
--passthrough-approximations .opentaint/model/config \
--max-memory 16G \
--output results/report.sarif
opentaint summary results/report.sarif --show-findings
Expected result: two java/security/graaljs-polyglot-code-injection findings at the sinks
listed above. Use the full <rule-file>:<rule-id> value shown in the command so OpenTaint also
loads the source and sink rules referenced by the join.
Start Conductor v3.23.0 with its default server configuration, then run:
# JavaScript INLINE task
python3 poc/poc_inline_lambda_rce.py --base-url http://localhost:8000
# Other supported paths
python3 poc/poc_inline_lambda_rce.py --task-type lambda --variant js
python3 poc/poc_inline_lambda_rce.py --task-type inline --variant python
The script exits with status 0 after it confirms command execution. The PoC also supports
DO_WHILE and SWITCH. Run it with --help for all options.
Conductor fixed the vulnerability in 3.30.2. See the case study for the vulnerable path, exploit details, rule design, and patch analysis.