CVE-2026-5366

criticalpriority · track · 10EPSS 0.010 · 64 %ileexploit · PoCEUUS

grimoire priorityP1 · Urgent

Exploitable?

Public exploit

1 exploit · PoC

Likely / severe?

1.03% (64th) EPSS

CVSS 9.9 · critical

Is it mine?

2 products

Check your exposure

Who says so?

3 sources

cnnvd · enisa_euvd · nvd

EPSS · scored 2026-10-23

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, which is passed to git commands, lacks validation and does not include a `--` separator to distinguish user input from git flags. This allows attackers to inject arbitrary git flags, such as `--upload-pack`, enabling execution of external programs. Additionally, the `directories` parameter can be exploited to inject git flags during sparse-checkout operations. These vulnerabilities allow any user with deployment creation permissions to execute arbitrary commands on worker machines, compromising shared work pools in multi-tenant environments.

cvss

Technical severity, 0–10. One row per scoring source.

9.9

010

base score 0–10 · higher = more severe · hover a vector to decode

v3.09.9criticalCVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:Hsecondary · ENISA EU

v3.09.9criticalCVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:Hsecondary · security@huntr.devexploitability 3.1 · impact 6

ssvc

A stakeholder decision — act, attend, or track — from exploitation and impact.

Exploitation: poc · Automatable: no · Technical Impact: totalcoordinatorcisa_ssvcUS

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-94US

exploits (1)

Public proof-of-concept and weaponised exploit code.

renat0z3r0/prefect-cve-2026-5366PoC for CVE-2026-5366: git argument injection in Prefect's GitRepository leading to RCE on the worker.PoC · poc_in_github

affected products (2)

Products and version ranges known to be affected.

prefecthq prefecthq/prefect≤ unspecified ≤latestenisa_euvdEU
prefect prefect= 3.6.23nvdUScpe:2.3:a:prefect:prefect:*:*:*:*:*:*:*:*

also known as (3)

Other names and identifiers for this entity.

sources

Which sources assert this record, and when.

cnnvd enisa_euvd nvd NVD CVE.org MITRE

published 2026-06-20modified 2026-07-01

references (3)

External citations — patches, advisories, analysis.

scry

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