CVE-2026-91002
stamparm maltrail Blacklist Endpoint httpd.py _blacklist missing authentication
- State
- Published
- Severity
- 6.9 Medium
- Published
- Sep 15, 2026
- Updated
- Sep 15, 2026
- Reserved
- Sep 14, 2026
Description
A weakness has been identified in stamparm maltrail up to 3.0.1. This vulnerability affects the function _blacklist of the file core/httpd.py of the component Blacklist Endpoint. Executing a manipulation can lead to missing authentication. The attack can be launched remotely. The exploit has been made available to the public and could be used for attacks. Upgrading to version 3.1 is able to resolve this issue. This patch is called d95868dff3da4d3bd4f942837a26cb7c73a797ae. It is suggested to upgrade the affected component. The vendor fixed the issue the same day it was reported, in version 3.1, by gating the endpoint on an authenticated session or the new Blacklist_ALLOWLIST option.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 4.0 | 6.9 Medium | CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:P | VulDB |
| 3.1 | 5.3 Medium | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N/E:P/RL:O/RC:C | VulDB |
| 3.0 | 5.3 Medium | CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N/E:P/RL:O/RC:C | VulDB |
| 2.0 | 5.0 Medium | AV:N/AC:L/Au:N/C:P/I:N/A:N/E:POC/RL:OF/RC:C | VulDB |
Weaknesses
Affected Products
| Product | Versions |
|---|---|
maltrailstamparm |
|
References
- VDB-403583 | stamparm maltrail Blacklist Endpoint httpd.py _blacklist missing authenticationvdb-entrytechnical-description
- VDB-403583 | CTI Indicators (IOB, IOC, IOA)signaturepermissions-required
- CVE-2026-91002 | CVE Analysis and Reportthird-party-advisory
- Submit #931699 | Maltrail 3.0.1 Missing Authenticationthird-party-advisory
- https://gist.github.com/simyat/fd48e9c257ab95405c109aec575977f1exploit
- https://github.com/stamparm/maltrail/commit/d95868dff3da4d3bd4f942837a26cb7c73a797aepatch
- https://github.com/stamparm/maltrail/releases/tag/3.1patch
- https://github.com/stamparm/maltrail/product
Every record here comes from the CVE Program’s CVE List. © 1999–2026 The MITRE Corporation. CVE is a registered trademark of The MITRE Corporation. The records are reproduced under the CVE Program terms of use.