CVE-2026-72538
HighCVSS 8.8Exploitation Probability (EPSS)
Elevated risk62th percentile - higher than 62% of all known CVEs
Summary
An argument injection vulnerability in PrefectHQ Prefect through 3.8.2 allows authenticated users to achieve remote code execution via the git_clone pull step branch field. The branch parameter is passed directly to git pull without sanitization, enabling injection of arbitrary git arguments. This represents a distinct code path from the incomplete fix applied for CVE-2026-5366 and allows command execution on the Prefect server.
Risk Assessment
The risk includes remote code execution on the Prefect server, which can lead to full system and data compromise. It may also enable further attacks on infrastructure.
Recommendation
It is recommended to immediately apply patches or sanitize the branch parameter in the git_clone step. Also restrict user privileges and monitor activities related to pull steps.
Other vulnerabilities in Prefect
See all- CVE-2026-5366Critical
Prefect version 3.6.23 is vulnerable to remote code execution due to improper handling of user-controlled input in the `GitRepository` storage class. The `commit_sha` parameter lacks validation and does not include a `--` separator, allowing injection of arbitrary git flags like `--upload-pack` to execute external programs. The `directories` parameter can also be exploited to inject git flags during sparse-checkout operations.
- CVE-2026-3515High
In Prefect version 3.6.18, the prefect-github integration injects the reference field into a git clone command without sanitization, allowing injection of git options. This can lead to SSRF, credential theft, or RCE.
- CVE-2026-7725Medium
In PrefectHQ prefect up to 3.6.25.dev6, in src/prefect/runner/storage.py (GitRepository Pull Handler component), manipulation of the commit_sha/directories arguments leads to argument injection. The attack can be launched remotely, and the exploit is public. The fix is released in version 3.6.25.dev7 (commit 6a9d9918716ce4ee0297b69f3046f7067ef1faae).
- CVE-2026-7724Medium
In PrefectHQ prefect up to 3.6.28.dev1, the validate_restricted_url function in the Webhook/Notification component is vulnerable to time-of-check time-of-use (TOCTOU). The attack can be initiated remotely but is considered highly complex and difficult to exploit. The fix is released in version 3.6.28.dev2 (commit 7c70ac54a5e101431d83b9f2681ec88d5e0021ed).
- CVE-2026-7722Medium
A vulnerability was detected in PrefectHQ prefect up to 3.6.21 in the endswith function of /api/health (Health Check API component). Manipulation results in improper authentication, and the attack can be carried out remotely. The exploit is public; the fix is in version 3.6.22 (commit e21617125335025b4b27e7d6f0ca028e8e8f3b79).
Original NVD description (English source)
An argument injection vulnerability in PrefectHQ Prefect through 3.8.2 allows authenticated users to achieve remote code execution via the git_clone pull step branch field. The branch parameter is passed directly to git pull without sanitization, enabling injection of arbitrary git arguments. This represents a distinct code path from the incomplete fix applied for CVE-2026-5366 and allows command execution on the Prefect server.
Vulnerability data from NVD (NIST) · CISA KEV · EPSS