prefecthq prefect up to 3.6.23 commit_sha code injection

CVSS Meta Temp Score
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CTI Interest Score
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7.9$0-$5k6.22

Summaryinfo

A vulnerability categorized as critical has been discovered in prefecthq prefect up to 3.6.23. This vulnerability affects unknown code. Executing a manipulation of the argument commit_sha can lead to code injection. This vulnerability is tracked as CVE-2026-5366. The attack can be launched remotely. No exploit exists. A patch should be applied to remediate this issue.

Detailsinfo

A vulnerability was found in prefecthq prefect up to 3.6.23. It has been declared as critical. This vulnerability affects an unknown functionality. The manipulation of the argument commit_sha with an unknown input leads to a code injection vulnerability. The CWE definition for the vulnerability is CWE-94. The product constructs all or part of a code segment using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the syntax or behavior of the intended code segment. As an impact it is known to affect confidentiality, integrity, and availability. CVE summarizes:

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.

The advisory is available at huntr.com. This vulnerability was named CVE-2026-5366 since 04/01/2026. The exploitation appears to be easy. The attack can be initiated remotely. Technical details are known, but there is no available exploit. This vulnerability is assigned to T1059 by the MITRE ATT&CK project.

Applying a patch is able to eliminate this problem.

The vulnerability is also documented in the vulnerability database at EUVD (EUVD-2026-38128). If you want to get best quality of vulnerability data, you may have to visit VulDB.

Productinfo

Vendor

Name

Version

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 8.1
VulDB Meta Temp Score: 7.9

VulDB Base Score: 6.3
VulDB Temp Score: 6.0
VulDB Vector: 🔒
VulDB Reliability: 🔍

CNA Base Score: 9.9
CNA Vector (@huntr_ai): 🔒

CVSSv2info

AVACAuCIA
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Code injection
CWE: CWE-94 / CWE-74 / CWE-707
CAPEC: 🔒
ATT&CK: 🔒

Physical: No
Local: No
Remote: Yes

Availability: 🔒
Status: Not defined
Price Prediction: 🔍
Current Price Estimation: 🔒

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Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Patch
Status: 🔍

0-Day Time: 🔒

Timelineinfo

04/01/2026 CVE reserved
06/20/2026 +80 days Advisory disclosed
06/20/2026 +0 days VulDB entry created
06/21/2026 +0 days VulDB entry last update

Sourcesinfo

Advisory: huntr.com
Status: Confirmed

CVE: CVE-2026-5366 (🔒)
GCVE (CVE): GCVE-0-2026-5366
GCVE (VulDB): GCVE-100-372562
EUVD: 🔒

Entryinfo

Created: 06/20/2026 21:28
Updated: 06/21/2026 01:59
Changes: 06/20/2026 21:28 (63), 06/21/2026 01:59 (1)
Complete: 🔍
Cache ID: 216::103

If you want to get best quality of vulnerability data, you may have to visit VulDB.

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