Description
A vulnerability has been found in CTFd up to 3.8.4. The affected element is the function _is_safe_url of the file CTFd/utils/validators/__init__.py. Such manipulation of the argument Next leads to open redirect. The attack can be launched remotely. The exploit has been disclosed to the public and may be used. The name of the patch is 5d8515842fd1ab2c3a9f2dde9ffca907aa334ea9. Upgrading the affected component is recommended.
Published: 2026-08-23
Score: 5.3 Medium
EPSS: < 1% Very Low
KEV: No
Impact: n/a
Action: n/a
AI Analysis

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Remediation

No vendor fix or workaround currently provided.

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Tracking

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Advisories

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History

Mon, 24 Aug 2026 19:30:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'poc', 'Technical Impact': 'partial'}, 'version': '2.0.3'}


Sun, 23 Aug 2026 23:00:00 +0000

Type Values Removed Values Added
Description A vulnerability has been found in CTFd up to 3.8.4. The affected element is the function _is_safe_url of the file CTFd/utils/validators/__init__.py. Such manipulation of the argument Next leads to open redirect. The attack can be launched remotely. The exploit has been disclosed to the public and may be used. The name of the patch is 5d8515842fd1ab2c3a9f2dde9ffca907aa334ea9. Upgrading the affected component is recommended.
Title CTFd __init__.py _is_safe_url redirect
First Time appeared Ctfd
Ctfd ctfd
Weaknesses CWE-601
CPEs cpe:2.3:a:ctfd:ctfd:*:*:*:*:*:*:*:*
Vendors & Products Ctfd
Ctfd ctfd
References
Metrics cvssV2_0

{'score': 5, 'vector': 'AV:N/AC:L/Au:N/C:N/I:P/A:N/E:POC/RL:OF/RC:C'}

cvssV3_0

{'score': 4.3, 'vector': 'CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N/E:P/RL:O/RC:C'}

cvssV3_1

{'score': 4.3, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N/E:P/RL:O/RC:C'}

cvssV4_0

{'score': 5.3, 'vector': 'CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:P'}


cve-icon MITRE

Status: PUBLISHED

Assigner: VulDB

Published:

Updated: 2026-08-24T18:12:57.182Z

Reserved: 2026-08-23T06:27:57.055Z

Link: CVE-2026-78145

cve-icon Vulnrichment

Updated: 2026-08-24T18:12:50.495Z

cve-icon NVD

Status : Deferred

Published: 2026-08-23T23:16:46.043

Modified: 2026-08-24T18:17:24.323

Link: CVE-2026-78145

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-08-24T01:00:03Z

Weaknesses
  • CWE-601

    URL Redirection to Untrusted Site ('Open Redirect')