CVE-2026-35598 json
Vikunja has Missing Authorization on CalDAV Task Read
published 2026-04-10 6 mo ago modified 2026-10-26 13 d ago also EUVD-2026-21425 , GHSA-48ch-p4gq-x46x , GO-2026-5114
- cvss
- 4.3
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.2%
- EPSS 0.2% chance of exploitation in 30 days, percentile 13%
- public exploits
- 0
- none known
Summary
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.
Patch / fix
- go code.vikunja.io/api 2.3.0
- vikunja vikunja 2.3.0
- govulncheck-vulndb openSUSE Leap 16.0 0.0.20260723T184607-160000.1.1
opensuse advisories openSUSE-SU-2026:21483-1
- github.com/go-vikunja/vikunja@879462d commit
- github.com/go-vikunja/vikunja#2579 pull request
- github.com/go-vikunja/vikunja/releases/tag/v2.3.0 release
CISA SSVC
- Exploitation
- Proof of concept is public
- Automatable
- no
- Technical impact
- partial
- Assessed
- 6 mo ago
Exploit prediction
0.22% chance of exploitation in the next 30 days, higher than 13% of all scored CVEs (FIRST EPSS, 2026-11-08).
Exploits and checks
- github.com https://github.com/go-vikunja/vikunja/security/advisories/GHSA-48ch-p4gq-x46x referenced PoC, tagged "exploit" by a source, unverified
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 3.1 | 4.3 | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N |
| GitHub | 3.1 | 4.3 | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N |
Affected packages
| ecosystem | package | affected | fixed in |
|---|---|---|---|
| go | code.vikunja.io/api | <2.3.0 all versions |
2.3.0 |
Affected products
- go-vikunja vikunja
Classification
- Weakness
-
- CWE-862 Missing Authorization
References
-
github.com
/go-vikunja/vikunja/pull/2579
web, issue-tracking
-
github.com
/go-vikunja/vikunja/commit/879462d717351fe5d276ddec5246bdec31b41661
web, patch
-
github.com
/go-vikunja/vikunja/security/advisories/GHSA-48ch-p4gq-x46x
exploit, web, vendor-advisory, advisory
-
github.com
/go-vikunja/vikunja/releases/tag/v2.3.0
web, release-notes
-
nvd.nist.gov
/vuln/detail/CVE-2026-35598
advisory
-
github.com
/go-vikunja/vikunja
package
Sources
- CVE List CVE-2026-35598
- GitHub Advisory GHSA-48ch-p4gq-x46x
- NVD CVE-2026-35598
- OSV GO-2026-5114
Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.
CPEs and fixed versions use Anchore's correction of NVD's data: Added CPE configurations because not yet analyzed by NVD.