CVE-2026-111918 json
Vikunja 1.0.0-rc0 before 2.7.0 Cross-Tenant Task Position Writes via Saved Filter Creation
published 2026-10-09 30 d ago modified 2026-10-27 12 d ago also GHSA-fprf-r6rv-xg99 , GO-2026-6731 , EUVD-2026-103303
- cvss
- 5.4
- 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 7%
- public exploits
- 0
- none known
Summary
Vikunja from 1.0.0-rc0 before 2.7.0 contains an improper authorization vulnerability in RecalculateTaskPositions that allows authenticated users with zero accessible projects to write task_positions rows for all tasks instance-wide. Attackers can delete their Inbox after repointing default_project_id, then create empty-filter saved filters to persist cross-tenant references and amplify writes for denial of service.
Patch / fix
- go code.vikunja.io/api 2.7.0
- go-vikunja vikunja 2.7.0
CISA SSVC
- Exploitation
- none
- Automatable
- no
- Technical impact
- partial
- Assessed
- 20 d ago
Exploit prediction
0.18% chance of exploitation in the next 30 days, higher than 7% 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:L/SC:N/SI:N/SA:N |
| CNA | 3.1 | 5.4 | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:L |
| CNA | 4.0 | 5.3 | CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:L/VA:L/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:N/I:L/A:L |
Affected packages
| ecosystem | package | affected | fixed in |
|---|---|---|---|
| go | code.vikunja.io/api | >=1.0.0-rc0, <2.7.0 all versions |
2.7.0 |
Affected products
- go-vikunja vikunja
Classification
- Weakness
-
- CWE-863 Incorrect Authorization
References
-
github.com
/go-vikunja/vikunja/commit/24e4563a547be182b338be2f614df339a64a6058
web
-
github.com
/go-vikunja/vikunja/security/advisories/GHSA-fprf-r6rv-xg99
vendor-advisory, web, advisory
-
vulncheck.com
/advisories/vikunja-1.0.0-rc0-before-2.7.0-cross-tenant-task-position-writes-via-saved-filter-creation
third-party-advisory
-
github.com
/go-vikunja/vikunja
package
-
github.com
/go-vikunja/vikunja/releases/tag/v2.7.0
web
Sources
- CVE List CVE-2026-111918
- GitHub Advisory GHSA-fprf-r6rv-xg99
- NVD CVE-2026-111918
- OSV GO-2026-6731
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.