CVE-2026-111921 json
Vikunja 0.13.0 before 2.7.0 Incorrect Authorization in Link Share Deletion
published 2026-10-09 30 d ago modified 2026-10-27 12 d ago also GHSA-fmmf-xq98-g327 , GO-2026-6730 , EUVD-2026-103289
- 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 11%
- public exploits
- 0
- none known
Summary
Vikunja 0.13.0 before 2.7.0 contains an incorrect authorization vulnerability that allows project members with Write permission to delete admin-tier link shares because the delete permission check reads an unloaded share object. Attackers can send DELETE requests to the v1 or v2 projects shares endpoints with sequential share IDs to revoke admin links and invalidate existing share sessions.
Patch / fix
- go code.vikunja.io/api 2.7.0
- go-vikunja vikunja 2.7.0
CISA SSVC
- Exploitation
- Proof of concept is public
- Automatable
- no
- Technical impact
- partial
- Assessed
- 18 d ago
Exploit prediction
0.21% chance of exploitation in the next 30 days, higher than 11% of all scored CVEs (FIRST EPSS, 2026-11-08).
Exploits and checks
- github.com https://github.com/go-vikunja/vikunja/security/advisories/GHSA-fmmf-xq98-g327 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: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 |
Affected packages
| ecosystem | package | affected | fixed in |
|---|---|---|---|
| go | code.vikunja.io/api | >=0.13.0, <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/60e543777b4d3ec8376f5485911cdec697e8c8ee
web
-
github.com
/go-vikunja/vikunja/security/advisories/GHSA-fmmf-xq98-g327
vendor-advisory, exploit, web, advisory
-
vulncheck.com
/advisories/vikunja-0.13.0-before-2.7.0-incorrect-authorization-in-link-share-deletion
third-party-advisory
-
github.com
/go-vikunja/vikunja
package
-
github.com
/go-vikunja/vikunja/releases/tag/v2.7.0
web
Sources
- CVE List CVE-2026-111921
- GitHub Advisory GHSA-fmmf-xq98-g327
- NVD CVE-2026-111921
- OSV GO-2026-6730
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