How severe is CVE-2026-35602?

CVE-2026-35602 has a CVSS 3.x base score of 5.4, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is none, integrity low, and availability low.

Is CVE-2026-35602 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (26th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-35602?

CVE-2026-35602 affects Vikunja. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-35602?

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

Does CVE-2026-35602 have an EU (EUVD) identifier?

Yes. CVE-2026-35602 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-21429.

When was CVE-2026-35602 published?

CVE-2026-35602 was published on 2026-04-10 and last updated on 2026-06-17.

CVE-2026-35602

CVE-2026-35602 is a medium-severity vulnerability in Vikunja with a CVSS 3.x base score of 5.4. 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-770.

Key facts

Severity: Medium (CVSS 3.x base score 5.4)
EPSS exploit prediction: 0% (26th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-21429
Weakness: CWE-770
Affected product: Vikunja
Published: 2026-04-10
Last modified: 2026-06-17

Description

Vikunja is an open-source self-hosted task management platform. Prior to 2.3.0, the Vikunja file import endpoint uses the attacker-controlled Size field from the JSON metadata inside the import zip instead of the actual decompressed file content length for the file size enforcement check. By setting Size to 0 in the JSON while including large compressed file entries in the zip, an attacker bypasses the configured maximum file size limit. This vulnerability is fixed in 2.3.0.

Frequently asked questions

What is CVE-2026-35602?: Vikunja is an open-source self-hosted task management platform. Prior to 2.3.0, the Vikunja file import endpoint uses the attacker-controlled Size field from the JSON metadata inside the import zip instead of the actual decompressed file content length for the file size enforcement check. By setting Size to 0 in the JSON while including large compressed file entries in the zip, an attacker bypasses the configured maximum file size limit. This vulnerability is fixed in 2.3.0.
How severe is CVE-2026-35602?: CVE-2026-35602 has a CVSS 3.x base score of 5.4, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is none, integrity low, and availability low.
Is CVE-2026-35602 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (26th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-35602?: CVE-2026-35602 affects Vikunja. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-35602?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2026-35602 have an EU (EUVD) identifier?: Yes. CVE-2026-35602 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-21429.
When was CVE-2026-35602 published?: CVE-2026-35602 was published on 2026-04-10 and last updated on 2026-06-17.

References

Affected products (1)

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

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