Medium severity · published Oct 17, 2026
CVE-2026-111921
Vikunja 0.13.0 before 2.7.0 Incorrect Authorization in Link Share Deletion
5.4
CVSS
0.2%
EPSS
No
On KEV
Description
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.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:L
Attack vector
Network
Complexity
Low
Privileges
Low
User interaction
None
Confidentiality
None
Integrity
Low
Availability
Low
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.2% · higher than 12% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
VI
vikunja · go-vikunja
0.13.0 before 2.7.0 · source: vendor
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-111921
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-111921
github.com
https://github.com/go-vikunja/vikunja/security/advisories/GHSA-fmmf-xq98-g327
www.vulncheck.com
https://www.vulncheck.com/advisories/vikunja-0.13.0-before-2.7.0-incorrect-authorization-in-link-share-deletion
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