CVE-2026-7724
PrefectHQ prefect Webhook/Notification validate_restricted_url toctou
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.
Attack profile
How easy it is to exploit
- Attack vector
- Network
- Complexity
- High
- Privileges needed
- Low
- User interaction
- None
What an attacker can affect
- Confidentiality
- Low
- Integrity
- Low
- Availability
- Low
Exploit likelihood
What each source reports
CVE List Score used
2.3
PrefectHQ prefect Webhook/Notification validate_restricted_url toctou
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.
- Record
CVE-2026-7724- CVSS 4.0
- 2.3 Low
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 - CVSS 3.1
- 5.0 Medium
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 - CVSS 3.0
- 5.0 Medium
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 - CVSS 2.0
- 4.6
AV:N/AC:H/Au:S/C:P/I:P/A:P/E:POC/RL:OF/RC:C - Weakness
- CWE-367, CWE-362
- Updated
- 2026-11-02
EUVDEUVD-2026-26879
2.3
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.
- Record
EUVD-2026-26879- CVSS 4.0
- 2.3 Low
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 - Updated
- 2026-11-02
GitHub AdvisoriesGHSA-p3pq-hxmr-vqqr
1.3
Prefect SSRF Bypass via DNS Rebinding in validate_restricted_url
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.
- Record
GHSA-p3pq-hxmr-vqqr- CVSS 4.0
- 1.3 Low
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 - CVSS 3.1
- 5.0 Medium
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:L - Weakness
- CWE-362
- Updated
- 2026-11-02
NVD
1.3
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.
- Record
CVE-2026-7724- CVSS 4.0
- 1.3 Low
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 - CVSS 3.1
- 5.0 Medium
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:L - CVSS 2.0
- 4.6 Medium
AV:N/AC:H/Au:S/C:P/I:P/A:P - Weakness
- CWE-362, CWE-367
- Updated
- 2026-11-02
OSV
1.3
PrefectHQ prefect Webhook/Notification validate_restricted_url toctou
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.
- Record
CVE-2026-7724- CVSS 4.0
- 1.3 Low
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 - Weakness
- CWE-362, CWE-367
- Updated
- 2026-11-02
OSVGHSA-p3pq-hxmr-vqqr
1.3
Prefect SSRF Bypass via DNS Rebinding in validate_restricted_url
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.
- Record
GHSA-p3pq-hxmr-vqqr- CVSS 4.0
- 1.3 Low
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 - CVSS 3.1
- 5.0 Medium
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:L - Weakness
- CWE-362
- Updated
- 2026-11-02
OSVPYSEC-2026-2959
1.3
Prefect SSRF Bypass via DNS Rebinding in validate_restricted_url
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.
- Record
PYSEC-2026-2959- CVSS 4.0
- 1.3 Low
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 - CVSS 3.1
- 5.0 Medium
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:L - Updated
- 2026-11-02
Affected products
Affected packages
| Package | Affected | Fixed |
|---|---|---|
prefectPyPI |
before 3.6.28.dev2 | 3.6.28.dev2 |
prefectPyPI |
before 3.6.28.dev2, plus listed versions 0.10.00.10.10.10.20.10.30.10.4 Show 45 moreShow less0.10.50.10.60.10.70.11.00.11.10.11.20.11.30.11.40.11.50.12.00.12.10.12.20.12.30.12.40.12.50.12.60.13.00.13.10.13.100.13.110.13.120.13.130.13.140.13.150.13.160.13.170.13.180.13.190.13.20.13.30.13.40.13.50.13.60.13.70.13.80.13.90.14.00.14.10.14.100.14.110.14.120.14.130.14.140.14.150.14.16 |
3.6.28.dev2 |
prefectPyPI |
before 3.6.28.dev2, plus listed versions 0.10.00.10.10.10.20.10.30.10.4 Show 45 moreShow less0.10.50.10.60.10.70.11.00.11.10.11.20.11.30.11.40.11.50.12.00.12.10.12.20.12.30.12.40.12.50.12.60.13.00.13.10.13.100.13.110.13.120.13.130.13.140.13.150.13.160.13.170.13.180.13.190.13.20.13.30.13.40.13.50.13.60.13.70.13.80.13.90.14.00.14.10.14.100.14.110.14.120.14.130.14.140.14.150.14.16 |
3.6.28.dev2 |
History
| Recorded | Changed | Sources |
|---|---|---|
| first indexed | CVE List, EUVD, GitHub Advisories, NVD, OSV |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2026-7724 is a low vulnerability (CVSS 2.3) in Prefecthq Prefect, published May 4, 2026. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.25%, the 16th percentile. Fixed in prefect 3.6.28.dev2.
References
vuldb.com/vuln/360900
vuldb.com/vuln/360900/cti
vuldb.com/submit/807303
linear.app/prefect/issue/OSS-7874/fix-dns-rebinding-toctou-bypass-in-validate-restricted-url
github.com/PrefectHQ/prefect/pull/21591
gist.github.com/nedlir/fa99777e8989414585d08c3625bf044a
Show 7 moreShow less
github.com/PrefectHQ/prefect/commit/7c70ac54a5e101431d83b9f2681ec88d5e0021ed
github.com/PrefectHQ/prefect/releases/tag/3.6.28.dev2
github.com/PrefectHQ/prefect
nvd.nist.gov/vuln/detail/CVE-2026-7724
github.com/advisories/GHSA-p3pq-hxmr-vqqr
github.com/CVEProject/cvelistV5/tree/main/cves/2026/7xxx/CVE-2026-7724.json
pypi.org/project/prefect
Left out here: 1,449 versions. The JSON record has them.