CVE-2026-111921CWE-863broken-access-control

CVE-2026-111921

Medium · published October 17, 2026

CVSS v3.1
5.4
EPSS
0%
Percentile
6.8
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v3.1
5.4 · MEDIUM
Vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:L
CVSS v4.0
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
EPSS
0.00176 · 6.8th percentile
Weakness
CWE-863 · Incorrect Authorization
Published
2026-10-17T23:16Z
References (3)
https://github.com/go-vikunja/vikunja/security/advisories/GHSA-fmmf-xq98-g327 · [email protected]https://www.vulncheck.com/advisories/vikunja-0.13.0-before-2.7.0-incorrect-authorization-in-link-share-deletion · [email protected]https://github.com/go-vikunja/vikunja/security/advisories/GHSA-fmmf-xq98-g327 · 134c704f-9b21-4f2e-91b3-4a467353bcc0
EPSS history
Timeline
  • 19 OCT 03:27Z
    EPSS moved — → 0%
    epss
  • 17 OCT 18:46Z
    Vikunja 0.13.0 before 2.7.0 Incorrect Authorization in Link Share Deletion
    cvelistv5
  • 17 OCT 18:46Z
    Vikunja 0.13.0 before 2.7.0 Incorrect Authorization in Link Share Deletion
    cvelistv5