CVE-2026-91002

stamparm maltrail Blacklist Endpoint httpd.py _blacklist missing authentication

MEDIUM
5.3
CVSS Score
Published: September 15, 2026 at 05:30 AM UTC
Updated: September 15, 2026 at 02:51 PM UTC
1 product affected across 1 vendorMaltrail

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Severity
MEDIUM5.3
Exploit prediction
EPSS 0.8%
SSVC
PoC

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.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Vendor states this is fixed in 3.1 (unaffected)

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

References (8)

VDB EntryTechnical Description
Source: cverecord
https://vuldb.com/vuln/403583
SignaturePermissions Required
Source: cverecord
https://vuldb.com/vuln/403583/cti
Third Party Advisory
Source: cverecord
https://vuldb.com/cve/CVE-2026-91002
Third Party Advisory
Source: cverecord
https://vuldb.com/submit/931699

SSVC — Action Prioritization

SSVCPoCAutomatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

5.3MEDIUMVulDB
Vector?

Quick Info

StatusDEFERRED
CWE
CWE-306CWE-287

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