CVE-2026-91984 json
Vikunja before 2.6.0 Broken Object-Level Authorization via task-position
published 2026-09-15 55 d ago modified 2026-10-19 20 d ago also GHSA-w39f-h553-h2mx , GO-2026-6755 , EUVD-2026-78655
- cvss
- 4.3
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.3%
- EPSS 0.3% chance of exploitation in 30 days, percentile 18%
- public exploits
- 0
- none known
Summary
Vikunja before 2.6.0 fails to validate that user-supplied project_view_id in task-position requests belongs to the task's project. Authenticated attackers can insert task position rows into arbitrary other tenant project views via POST or PUT task-position endpoints.
Patch / fix
- go code.vikunja.io/api 2.6.0
- go-vikunja vikunja 2.6.0
- github.com/go-vikunja/vikunja@077dc4d commit
- github.com/go-vikunja/vikunja#3688 pull request
- github.com/go-vikunja/vikunja/releases/tag/v2.6.0 release
CISA SSVC
- Exploitation
- none
- Automatable
- no
- Technical impact
- partial
- Assessed
- 52 d ago
Exploit prediction
0.26% chance of exploitation in the next 30 days, higher than 18% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 4.0 | 5.3 | CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N |
| CNA | 3.1 | 4.3 | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N |
| CNA | 4.0 | 5.3 | CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X |
Affected packages
| ecosystem | package | affected | fixed in |
|---|---|---|---|
| go | code.vikunja.io/api | <2.6.0 all versions |
2.6.0 |
Affected products
- go-vikunja vikunja
Classification
References
-
github.com
/go-vikunja/vikunja/pull/3688
web
-
github.com
/go-vikunja/vikunja/commit/077dc4de79ce6f1ab59215a2c7bf9b30423685f2
web
-
github.com
/go-vikunja/vikunja/security/advisories/GHSA-w39f-h553-h2mx
vendor-advisory, web, advisory
-
vulncheck.com
/advisories/vikunja-before-2.6.0-broken-object-level-authorization-via-task-position
third-party-advisory, web
-
nvd.nist.gov
/vuln/detail/CVE-2026-91984
advisory
-
github.com
/go-vikunja/vikunja
package
-
github.com
/go-vikunja/vikunja/releases/tag/v2.6.0
web
Sources
- CVE List CVE-2026-91984
- GitHub Advisory GHSA-w39f-h553-h2mx
- NVD CVE-2026-91984
- OSV GO-2026-6755
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.