Is CVE-2026-28268 in the CISA KEV catalog?

No. CVE-2026-28268 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2026-28268?

CVE-2026-28268 has a CVSS v3 base score of 9.8 (CRITICAL).

What is the EPSS score for CVE-2026-28268?

CVE-2026-28268 has an EPSS score of 0.67% (48th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2026-28268?

Upgrade vikunja to 2.1.0 or later.

CVE & CISA-KEV Catalog

CVE-2026-28268

CRITICAL

9.8

CVSS v3

NVD

Description

Vikunja is an open-source self-hosted task management platform. Versions prior to 2.1.0 have a business logic vulnerability exists in the password reset mechanism of vikunja/api that allows password reset tokens to be reused indefinitely. Due to a failure to invalidate tokens upon use and a critical logic bug in the token cleanup cron job, reset tokens remain valid forever. This allows an attacker who intercepts a single reset token (via logs, browser history, or phishing) to perform a complete, persistent account takeover at any point in the future, bypassing standard authentication controls. Version 2.1.0 contains a patch for the issue.

CWE-459 CWE-640

How to fix

Remediation Available

vikunjaNVD

Affected:< 2.1.0Fixed in:2.1.0CVE-2026-28268derived from NVD

TridentStack Control can deploy fixes like this automatically across your Windows, macOS, and Linux fleet. See how it works

Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v3 Vector

Exploitability

Attack VectorNetwork

Attack ComplexityLow

Privileges RequiredNone

User InteractionNone

ScopeUnchanged

Impact

ConfidentialityHigh

IntegrityHigh

AvailabilityHigh

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Exploit Intelligence

0.67%probability of exploitation in 30 days

48thpercentile

Moderate risk: more likely to be exploited than 48% of all known CVEs.

References

Patch1

github.com

Vendor Advisory1

github.com

Release Notes1

vikunja.io

Related Vulnerabilities

Other CWE-459 vulnerabilities, ordered by exploit likelihood. View all

CVE	Severity	CVSS	EPSS	Exploited	Fix
CVE-2017-17090	High	7.5	82%	-	Fix
CVE-2021-39327	Medium	5.3	72%	-	-
CVE-2025-31650	High	7.5	68%	-	Fix
CVE-2022-1552	High	8.8	12%	-	Fix
CVE-2018-18924	High	8.8	9.5%	-	-
CVE-2022-21125	Medium	5.5	6.5%	-	Fix

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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2026-03-06.