4.3

CVE-2026-35598: go-vikunja vikunja Missing Authorization

CVSS: 4.3v3.1MediumAnalyzed
AliasesGHSA-48ch-p4gq-x46xGO-2026-5114
Published 10-04-2026Last modified 14-04-2026
Open JSON

Vulnerability summary

CVE-2026-35598 is a medium (CVSS 4.3) Missing Authorization vulnerability in go-vikunja vikunja. EPSS estimates a 0.35% chance of exploitation in the next 30 days, higher than 27% of scored vulnerabilities. 1 public exploit is recorded.

Overall risk
27/100
0100
Medium · default modelHow is this calculated?
CVSS score
4.3/10
010
Medium · v3.1 (CVE.org)
EPSS score
0.35%
0%100%
Low · +0.13 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits1github

Advisory lineage

Upstream 0 · Downstream 1 · Related 1
OPENSUSE-SU-2026:21483-1

Timeline

  1. 10-04-2026
    PublishedVulnerability first disclosed.
  2. 14-04-2026
    Last modifiedVulnerability information updated.

Description

Vikunja is an open-source self-hosted task management platform. Prior to 2.3.0, the CalDAV GetResource and GetResourcesByList methods fetch tasks by UID from the database without verifying that the authenticated user has access to the task's project. Any authenticated CalDAV user who knows (or guesses) a task UID can read the full task data from any project on the instance. This vulnerability is fixed in 2.3.0.

CVSS metrics

3 scores · 3 sources · 1 version

EPSS trend

Probability

0.35%

Chance of exploitation in the next 30 days

Percentile

27%

Versus all other CVEs

30-day change

+0.13 pp

From 0.22% on 21-09-2026

21-09-202621-10-2026
EPSS score
0.35%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

1 found
  • githubUnverified

    Vikunja

    Maturity: poc

Weaknesses

CWE · root cause

Affected systems

Code.vikunja.io1 product
  • api< 2.3.0 | All versions (No fix recorded)
Go-vikunja1 product
Vikunja1 product

3 vendors · 3 products

References

6 links