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CVE-2026-35602

Vikunja has a File Size Limit Bypass via Vikunja Import

Published: Apr 10, 2026Updated: Apr 17, 2026 Sources: CVE List NVDCWE-770
5.4MEDIUM
NVD MITRE
EPSS Score
0.3%
Top 73.1%
CISA KEV
Not in KEV
Exploits
No Known Exploits
Remediation
Patch Available
Self-Check
Not available

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.

No summary for this CVE yet.

CVSS Vector Breakdown

AV:NAC:LPR:LUI:NS:UC:NI:LA:L
Exploitability
AV:NAttack Vector
Network
AC:LAttack Complexity
Low
PR:LPrivileges Required
Low
UI:NUser Interaction
None
Scope
S:UScope
Unchanged
Impact
C:NConfidentiality
None
I:LIntegrity
Low
A:LAvailability
Low
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Weaknesses

CWE-770

Affected Products

go-vikunja
oss-projectaka vikunja
vikunjaOn-prem
Cloud & SaaS / saas-application
vikunja
oss-project
vikunjaOn-prem
Enterprise Software / collaboration-groupware

Exploitability

Official Patch Available

Attack Graph

Products CVE Techniques Tactics

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MITRE ATT&CK

1 technique
Impact
View detailed technique mapping

References

https://github.com/go-vikunja/vikunja/security/advisories/GHSA-qh78-rvg3-cv54
github.com
https://github.com/go-vikunja/vikunja/pull/2575
github.com
https://github.com/go-vikunja/vikunja/releases/tag/v2.3.0
github.com

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