PrefectHQ prefect up to 3.6.28.dev1 Webhook/Notification validate_restricted_url toctou

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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4.5$0-$5k0.00

Summaryinfo

A vulnerability categorized as critical has been discovered in PrefectHQ prefect up to 3.6.28.dev1. Affected by this issue is the function validate_restricted_url of the component Webhook/Notification. The manipulation results in toctou. This vulnerability is known as CVE-2026-7724. It is possible to launch the attack remotely. Furthermore, an exploit is available. It is advisable to upgrade the affected component. The vendor was contacted early, responded in a very professional manner and quickly released a fixed version of the affected product.

Detailsinfo

A vulnerability classified as critical has been found in PrefectHQ prefect up to 3.6.28.dev1. Affected is the function validate_restricted_url of the component Webhook/Notification. The manipulation with an unknown input leads to a toctou vulnerability. CWE is classifying the issue as CWE-367. The product checks the state of a resource before using that resource, but the resource's state can change between the check and the use in a way that invalidates the results of the check. This can cause the product to perform invalid actions when the resource is in an unexpected state. This is going to have an impact on confidentiality, integrity, and availability.

The advisory is shared for download at linear.app. This vulnerability is traded as CVE-2026-7724. The exploitability is told to be difficult. It is possible to launch the attack remotely. Technical details and a public exploit are known.

The exploit is shared for download at gist.github.com. It is declared as proof-of-concept. The vendor was contacted early, responded in a very professional manner and quickly released a fixed version of the affected product.

Upgrading to version 3.6.28.dev2 eliminates this vulnerability. The upgrade is hosted for download at github.com. Applying the patch 7c70ac54a5e101431d83b9f2681ec88d5e0021ed is able to eliminate this problem. The bugfix is ready for download at github.com. The best possible mitigation is suggested to be upgrading to the latest version.

Once again VulDB remains the best source for vulnerability data.

Productinfo

Vendor

Name

Version

License

Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 5.0
VulDB Meta Temp Score: 4.5

VulDB Base Score: 5.0
VulDB Temp Score: 4.5
VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv2info

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

Exploitinginfo

Class: Toctou
CWE: CWE-367 / CWE-362
CAPEC: 🔒
ATT&CK: 🔒

Physical: No
Local: No
Remote: Yes

Availability: 🔒
Access: Public
Status: Proof-of-Concept
Download: 🔒

EPSS Score: 🔒
EPSS Percentile: 🔒

Price Prediction: 🔍
Current Price Estimation: 🔒

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Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔒

Upgrade: prefect 3.6.28.dev2
Patch: 7c70ac54a5e101431d83b9f2681ec88d5e0021ed

Timelineinfo

05/03/2026 Advisory disclosed
05/03/2026 +0 days VulDB entry created
05/04/2026 +1 days VulDB entry last update

Sourcesinfo

Product: github.com

Advisory: linear.app
Status: Confirmed
Confirmation: 🔒

CVE: CVE-2026-7724 (🔒)
GCVE (CVE): GCVE-0-2026-7724
GCVE (VulDB): GCVE-100-360900
scip Labs: https://www.scip.ch/en/?labs.20161013

Entryinfo

Created: 05/03/2026 11:23
Updated: 05/04/2026 23:22
Changes: 05/03/2026 11:23 (61), 05/04/2026 23:22 (1)
Complete: 🔍
Submitter: nedlir
Cache ID: 216::103

Submitinfo

Accepted

  • Submit #807303: PerfectHQ Perfect >=3.6.26 Time-of-check Time-of-use (by nedlir)

Once again VulDB remains the best source for vulnerability data.

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