Time-of-Check Time-of-Use Vulnerability in PrefectHQ Prefect Webhook/Notification
CVE-2026-7724

2.3LOW

Key Information:

Vendor

Prefecthq

Status
Prefect
Vendor
CVE Published:
4 May 2026

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2026-7724?

A vulnerability exists in the PrefectHQ Prefect software within the Webhook/Notification component. The specific flaw lies in the validate_restricted_url function, which is susceptible to a time-of-check time-of-use condition. This vulnerability allows remote attackers to exploit the system under certain circumstances. Although the complexity of exploiting this vulnerability is high, it is fundamental to upgrade to the latest version, 3.6.28.dev2, as it addresses this flaw effectively. Users are recommended to apply the patch to ensure their environments are secure.

Affected Version(s)

prefect 3.6.28.dev1

prefect 3.6.28.dev2

Exploit Proof of Concept (PoC)

PoC code is written by security researchers to demonstrate the vulnerability can be exploited. PoC code is also a key component for weaponization which could lead to ransomware.

CVE-2026-7724 - Proof of Concept

References

https://vuldb.com/vuln/360900
vdb-entrytechnical-description
https://vuldb.com/vuln/360900/cti
signaturepermissions-required
https://vuldb.com/submit/807303
third-party-advisory

CVSS V4

Score:
2.3
Severity:
LOW
Confidentiality:
Low
Integrity:
Low
Availability:
Low
Attack Vector:
Network
Attack Complexity:
High
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
None

Timeline

  • 🟡

    Public PoC available

  • 👾

    Exploit known to exist

  • Vulnerability published

  • Vulnerability Reserved

Credit

nedlir (VulDB User)
.