CVE-2026-111920 json
Vikunja 2.6.0 Broken Access Control via Inherited Project Permissions
published 2026-10-09 30 d ago modified 2026-10-28 11 d ago also GHSA-pjr3-86v4-5p7w , GO-2026-6745 , EUVD-2026-103288
- 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 8%
- public exploits
- 0
- none known
Summary
Vikunja 2.6.0 contains a broken access control flaw in getProjectAccessForUser (pkg/models/project_access.go), which resolves a user's effective project permission as the maximum over the project tree, silently overriding explicit lower-permission shares on sub-projects. A collaborator with write access on a parent project but read-only access to a child project can modify the child project's tasks and content.
Patch / fix
CISA SSVC
- Exploitation
- Proof of concept is public
- Automatable
- no
- Technical impact
- partial
- Assessed
- 21 d ago
Exploit prediction
0.19% chance of exploitation in the next 30 days, higher than 8% of all scored CVEs (FIRST EPSS, 2026-11-08).
Exploits and checks
- github.com https://github.com/go-vikunja/vikunja/security/advisories/GHSA-pjr3-86v4-5p7w referenced PoC, tagged "exploit" by a source, unverified
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 |
| GitHub | 3.1 | 5.4 | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N |
Affected packages
| ecosystem | package | affected | fixed in |
|---|---|---|---|
| go | code.vikunja.io/api | >=2.6.0, <2.7.0 all versions |
2.7.0 |
Affected products
- go-vikunja vikunja
Classification
References
-
github.com
/go-vikunja/vikunja/commit/890ca5979d0c770bb5d158362797879c115961af
web
-
github.com
/go-vikunja/vikunja/security/advisories/GHSA-pjr3-86v4-5p7w
vendor-advisory, exploit, web, advisory
-
vulncheck.com
/advisories/vikunja-2.6.0-broken-access-control-via-inherited-project-permissions
third-party-advisory
-
github.com
/go-vikunja/vikunja
package
-
vikunja.io
/changelog/vikunja-2.7.0-was-released
web
Sources
- CVE List CVE-2026-111920
- GitHub Advisory GHSA-pjr3-86v4-5p7w
- NVD CVE-2026-111920
- OSV GO-2026-6745
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.