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CVE-2026-91972 Details

ANALYZED

This CVE record has been analyzed and enriched by NVDAPI.com as an independent party.

Description

Vikunja versions before 2.6.0 fail to apply rate limiting to /api/v2 public authentication endpoints including login, register, password-reset, and OAuth token routes. Remote unauthenticated attackers can perform unbounded credential guessing, account enumeration, and password-reset flooding attacks without throttling restrictions.

Metrics

CVSS 3.x Severity and Vector Strings:

VolerionCVSS-B:8.2 HIGHVector:CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:L

CNA: [email protected]CVSS-B:7.5 HIGHVector:CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

References to Advisories, Solutions, and Tools

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URL	Source(s)	Tag(s)
https://github.com/go-vikunja/vikunja/security/advisories/GHSA-6rvj-qwjf-3m4q	CISA-ADP	AdvisoryTechnical DescriptionVendor
https://github.com/go-vikunja/vikunja/security/advisories/GHSA-6rvj-qwjf-3m4q	[email protected]	AdvisoryTechnical DescriptionVendor
https://www.vulncheck.com/advisories/vikunja-before-2.6.0-authentication-bypass-via-unthrottled-api	[email protected]	Advisory

Weakness Enumeration

CWE-ID	CWE Name	Source
CWE-307	Improper Restriction of Excessive Authentication Attempts	[email protected]

Affected Products

Product	Versions
Vikunja	<= 2.5.0 (semver)
CPE No CPEs found in CPE dictionary for this product. Remediation Upgrade: 2.6.0moderate effort

Change History

2 change records found show changes

Date	Action	Recorded By
Sep 17, 2026	CVE Modified	CISA-ADP
Sep 15, 2026	New CVE Received	[email protected]