Is CVE-2026-3515 actively exploited?

No active exploitation of CVE-2026-3515 has been confirmed so far. Continue monitoring, as exploit status can change.

Can CVE-2026-3515 be exploited remotely?

Yes. CVE-2026-3515 is exploitable remotely over the network (CVSS attack vector: Network).

What is the CVSS score of CVE-2026-3515?

CVE-2026-3515 has a CVSS score of 8.5 (HIGH).

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HIGH

CVE-2026-3515

CWE-88Published: May 24, 2026· Updated: May 26, 2026

8.5

CVSS v3.1

EPSS:0.10%probability of exploitation in 30 daysPercentile:26.1th

Official Description

A vulnerability in the `GitHubRepository` block of the `prefect-github` integration in Prefect version 3.6.18 allows an attacker to inject arbitrary git command-line options via the `reference` field. The `reference` field is concatenated directly into a `git clone` command string without proper sanitization, and then parsed by `shlex.split()`. This enables injection of options such as `-c`, leading to potential Server-Side Request Forgery (SSRF), credential theft, or remote code execution (RCE). The vulnerability affects both the `aget_directory()` and `get_directory()` methods in `src/integrations/prefect-github/prefect_github/repository.py`. This issue does not affect the GitLab and BitBucket integrations, which use a safer list-based command construction approach.

NVD Source

Technical Analysis

CVE-2026-3515 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

Exploitation requires low privileges, which limits the exposure to scenarios where an attacker has already gained initial access.

A successful exploit results in complete confidentiality breach (data exposure), with a CVSS base score of 8.5.

The vulnerability has a "Changed" scope, meaning successful exploitation can impact components beyond the vulnerable component itself — such as the host operating system or adjacent services.