CVE-2026-27575

Q: How do I fix CVE-2026-27575?

Upgrade vikunja to 2.0.0 or later.

Q: Is CVE-2026-27575 being actively exploited?

Not that we know of. CVE-2026-27575 is not in the CISA Known Exploited Vulnerabilities catalog. Its EPSS score of 0.43% is the estimated probability that it will be exploited in the next 30 days. That is higher than 36% of all scored CVEs.

Q: How severe is CVE-2026-27575?

CVE-2026-27575 has a CVSS v3 base score of 9.1, rated critical. CVSS rates the technical impact if the vulnerability is exploited, not how likely that is, so weigh it alongside the exploit-prediction score when you decide what to patch first.

Q: What does CVE-2026-27575 affect?

Published advisories record a fix for vikunja (NVD). Only products with a sourced advisory are listed, so treat this as what we can cite rather than a complete inventory.

CRITICAL

9.1

CVSS v3

NVD

Description

Vikunja is an open-source self-hosted task management platform. Prior to version 2.0.0, the application allows users to set weak passwords (e.g., 1234, password) without enforcing minimum strength requirements. Additionally, active sessions remain valid after a user changes their password. An attacker who compromises an account (via brute-force or credential stuffing) can maintain persistent access even after the victim resets their password. Version 2.0.0 contains a fix.

CWE-521 CWE-613

How to fix

Remediation Available

vikunjaNVD

Affected:< 2.0.0Fixed in:2.0.0CVE-2026-27575derived 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

AvailabilityNone

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

Exploit Intelligence

0.43%probability of exploitation in 30 days

36thpercentile

Low risk: more likely to be exploited than 36% of all known CVEs.

References

Exploit1

github.com

Release Notes1

vikunja.io

Related Vulnerabilities

Other CWE-521 vulnerabilities, ordered by exploit likelihood. View all

CVE	Severity	CVSS	EPSS	Exploited	Fix
CVE-2019-17444	Critical	9.8	69%	-	Fix
CVE-2012-2441	High	8.5	8.6%	-	Fix
CVE-2017-3186	Critical	9.8	6.1%	-	-
CVE-2019-18988	High	7.0	4.7%	KEV	-
CVE-2018-1000134	Critical	9.8	4.7%	-	-
CVE-2017-6339	Medium	6.5	4.1%	-	-

Common questions

How do I fix CVE-2026-27575?

Upgrade vikunja to 2.0.0 or later.

Is CVE-2026-27575 being actively exploited?

Not that we know of. CVE-2026-27575 is not in the CISA Known Exploited Vulnerabilities catalog. Its EPSS score of 0.43% is the estimated probability that it will be exploited in the next 30 days. That is higher than 36% of all scored CVEs.

How severe is CVE-2026-27575?

CVE-2026-27575 has a CVSS v3 base score of 9.1, rated critical. CVSS rates the technical impact if the vulnerability is exploited, not how likely that is, so weigh it alongside the exploit-prediction score when you decide what to patch first.

What does CVE-2026-27575 affect?

Published advisories record a fix for vikunja (NVD). Only products with a sourced advisory are listed, so treat this as what we can cite rather than a complete inventory.

Embed a live status badge for CVE-2026-27575

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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 2026-03-05.