How severe is CVE-2026-33315?

CVE-2026-33315 has a CVSS 3.x base score of 4.3, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is low, integrity none, and availability none.

Is CVE-2026-33315 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (22nd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-33315?

CVE-2026-33315 affects Vikunja. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-33315?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

Does CVE-2026-33315 have an EU (EUVD) identifier?

Yes. CVE-2026-33315 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-20091.

When was CVE-2026-33315 published?

CVE-2026-33315 was published on 2026-03-24 and last updated on 2026-06-17.

CVE-2026-33315

CVE-2026-33315 is a medium-severity vulnerability in Vikunja with a CVSS 3.x base score of 4.3. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-288.

Key facts

Severity: Medium (CVSS 3.x base score 4.3)
CVSS v4: 6.9
EPSS exploit prediction: 0% (22nd percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-20091
Weakness: CWE-288
Affected product: Vikunja
Published: 2026-03-24
Last modified: 2026-06-17

Description

Vikunja is an open-source self-hosted task management platform. Prior to version 2.2.0, the Caldav endpoint allows login using Basic Authentication, which in turn allows users to bypass the TOTP on 2FA-enabled accounts. The user can then access standard project information that would normally be protected behind 2FA (if enabled), such as project name, description, etc. Version 2.2.0 patches the issue.

Frequently asked questions

What is CVE-2026-33315?: Vikunja is an open-source self-hosted task management platform. Prior to version 2.2.0, the Caldav endpoint allows login using Basic Authentication, which in turn allows users to bypass the TOTP on 2FA-enabled accounts. The user can then access standard project information that would normally be protected behind 2FA (if enabled), such as project name, description, etc. Version 2.2.0 patches the issue.
How severe is CVE-2026-33315?: CVE-2026-33315 has a CVSS 3.x base score of 4.3, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is low, integrity none, and availability none.
Is CVE-2026-33315 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (22nd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-33315?: CVE-2026-33315 affects Vikunja. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-33315?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2026-33315 have an EU (EUVD) identifier?: Yes. CVE-2026-33315 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-20091.
When was CVE-2026-33315 published?: CVE-2026-33315 was published on 2026-03-24 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:vikunja:vikunja:*:*:*:*:*:*:*:*

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