CVE-2026-7724 json
PrefectHQ prefect Webhook/Notification validate_restricted_url toctou
published 2026-05-04 6 mo ago modified 2026-10-26 13 d ago also GHSA-p3pq-hxmr-vqqr , PYSEC-2026-2959 , EUVD-2026-26879
- cvss
- 5.0
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.3%
- EPSS 0.3% chance of exploitation in 30 days, percentile 16%
- public exploits
- 0
- none known
Summary
A vulnerability has been found in PrefectHQ prefect up to 3.6.28.dev1. Affected by this vulnerability is the function validate_restricted_url of the component Webhook/Notification. The manipulation leads to time-of-check time-of-use. It is possible to initiate the attack remotely. The attack is considered to have high complexity. The exploitation appears to be difficult. The exploit has been disclosed to the public and may be used. Upgrading to version 3.6.28.dev2 addresses this issue. The identifier of the patch is 7c70ac54a5e101431d83b9f2681ec88d5e0021ed. Upgrading the affected component is advised. The vendor was contacted early, responded in a very professional manner and quickly released a fixed version of the affected product.
Patch / fix
- pypi prefect 3.6.28.dev2
- PrefectHQ prefect 3.6.28.dev2
CISA SSVC
- Exploitation
- Proof of concept is public
- Automatable
- no
- Technical impact
- partial
- Assessed
- 6 mo ago
Exploit prediction
0.25% chance of exploitation in the next 30 days, higher than 16% of all scored CVEs (FIRST EPSS, 2026-11-08).
Exploits and checks
- gist.github.com https://gist.github.com/nedlir/fa99777e8989414585d08c3625bf044a referenced PoC, tagged "exploit" by a source, unverified
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 4.0 | 2.3 | CVSS:4.0/AV:N/AC:H/AT:N/PR:L/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P |
| CNA | 3.1 | 5.0 | CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:L/E:P/RL:O/RC:C |
| CNA | 3.0 | 5.0 | CVSS:3.0/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:L/E:P/RL:O/RC:C |
| CNA | 2.0 | 4.6 | AV:N/AC:H/Au:S/C:P/I:P/A:P/E:POC/RL:OF/RC:C |
| CNA | 4.0 | 1.3 | CVSS:4.0/AV:N/AC:H/AT:N/PR:L/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X |
| CNA | 3.1 | 5.0 | CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:L |
| CNA | 2.0 | 4.6 | AV:N/AC:H/Au:S/C:P/I:P/A:P |
| OSV | 3.1 | 5.0 | CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:L |
| GitHub | 3.1 | 5.0 | CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:L |
Affected packages
| ecosystem | package | affected | fixed in |
|---|---|---|---|
| pypi | prefect | <3.6.28.dev2 |
3.6.28.dev2 |
Affected products
- PrefectHQ prefect
Classification
References
-
github.com
/PrefectHQ/prefect/pull/21591
issue-tracking, patch, web
-
github.com
/PrefectHQ/prefect/commit/7c70ac54a5e101431d83b9f2681ec88d5e0021ed
patch, web
-
github.com
/PrefectHQ/prefect/releases/tag/3.6.28.dev2
patch, web
-
gist.github.com
/nedlir/fa99777e8989414585d08c3625bf044a
exploit, web
-
vuldb.com
/vuln/360900
vdb-entry, technical-description, web
-
vuldb.com
/vuln/360900/cti
signature, permissions-required, web
-
vuldb.com
/submit/807303
third-party-advisory, web
-
linear.app
/prefect/issue/OSS-7874/fix-dns-rebinding-toctou-bypass-in-validate-restricted-url
issue-tracking, web
-
github.com
/PrefectHQ/prefect/
product
-
nvd.nist.gov
/vuln/detail/CVE-2026-7724
advisory
-
github.com
/PrefectHQ/prefect
package
-
pypi.org
/project/prefect
package
-
github.com
/advisories/GHSA-p3pq-hxmr-vqqr
advisory
Sources
- CVE List CVE-2026-7724
- GitHub Advisory GHSA-p3pq-hxmr-vqqr
- NVD CVE-2026-7724
- OSV PYSEC-2026-2959
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