CVE-2026-124329: FlowCI flow-core-x path traversal in FileHelper.unzip

CVE-2026-124329 · Severity: medium · CVSS 5 · Published 2026-11-08

FlowCI flow-core-x is a continuous integration platform component that processes job reports and artifacts. A path traversal vulnerability in its file extraction function allows an attacker to write files outside the intended directory during ZIP extraction, potentially overwriting critical application files or gaining code execution. This could lead to system compromise or data manipulation depending on the application's file permissions.

Technologies: FlowCI Flow-Core-X. Vendors: FlowCI.

Quick answers

Is CVE-2026-124329 exploited in the wild?
No. Junglewise Threat Intelligence has no report of CVE-2026-124329 being exploited in the wild.
How severe is CVE-2026-124329?
Medium severity, with a CVSS score of 5, published 8 November 2026.
Which products and versions are affected?
FlowCI Flow-Core-X up to 1.23.49.
Is there a fix for CVE-2026-124329?
No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.
How is CVE-2026-124329 attacked?
It is attacked over the network, in a software library.
Am I affected by CVE-2026-124329?
Check whether you run FlowCI Flow-Core-X at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

Technical details

A path traversal vulnerability exists in the FileHelper.unzip function in common/src/main/java/com/flowci/common/helper/FileHelper.java. The function fails to properly validate ZIP archive contents before extraction, allowing crafted archives with directory traversal sequences (e.g., "../") to write files outside the target directory. Remote attackers can exploit this via specially crafted job report ZIP files, though the attack requires high complexity to execute.

Affected products

  • FlowCI flow-core-x up to 1.23.49

Timeline

  • 2026-11-08: disclosed

References

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