Vulnerability · Published Apr 10, 2026 · Assigned by GitHub_M

CVE-2026-35596Vikunja has Broken Access Control on Label Read via SQL Operator Precedence Bug

Medium 4.3

In plain English

A medium-severity incorrect authorization in vikunja from go-vikunja. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.3% (higher than 20% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS 3.1)4.3Medium

Exploit odds (30 days)0.3%top 80.4% of all CVEs

Exploited in the wildNo reportsCISA SSVC: poc

Attack toolingNoneno public tooling known

Official description

Vikunja is an open-source self-hosted task management platform. Prior to 2.3.0, the hasAccessToLabel function contains a SQL operator precedence bug that allows any authenticated user to read any label that has at least one task association, regardless of project access. Label titles, descriptions, colors, and creator information are exposed. This vulnerability is fixed in 2.3.0.

Affected packages & fixed versions

Ecosystem	Package	Fixed in	Advisory
Go	code.vikunja.io/api	2.3.0	GHSA-hj5c-mhh2-g7jq
Go	code.vikunja.io/api	no fix listed	GO-2026-5428

Affected products (as reported)

Vendor	Product	Versions
go-vikunja	vikunja	< 2.3.0

Weakness: CWE-863 · Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N

References

https://github.com/go-vikunja/vikunja/security/advisories/GHSA-hj5c-mhh2-g7jq x_refsource_CONFIRM
https://github.com/go-vikunja/vikunja/pull/2578 x_refsource_MISC
https://github.com/go-vikunja/vikunja/commit/fc216c38afaa51dd56dde7a97343d2148ecf24c1 x_refsource_MISC
https://github.com/go-vikunja/vikunja/releases/tag/v2.3.0 x_refsource_MISC