GHSA-9xwc-vwww-qqmw

Source

https://github.com/advisories/GHSA-9xwc-vwww-qqmw

Import Source

https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/08/GHSA-9xwc-vwww-qqmw/GHSA-9xwc-vwww-qqmw.json

JSON Data

https://api.osv.dev/v1/vulns/GHSA-9xwc-vwww-qqmw

Withdrawn

2026-10-09T20:43:21Z

Published

2026-08-19T15:32:33Z

Modified

2026-10-09T21:00:05Z

Severity

7.5 (High) CVSS_V3 - CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H CVSS Calculator
7.7 (High) CVSS_V4 - CVSS:4.0/AV:N/AC:H/AT:P/PR:L/UI:N/VC:H/VI:H/VA:H/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 CVSS Calculator

Summary

Duplicate Advisory: Vikunja: Link-share principal-type confusion enables cross-account team removal, bot takeover, and roster disclosure

Details

Duplicate Advisory

This advisory has been withdrawn because it is a duplicate of GHSA-32r8-5843-4qw2. This link is maintained to preserve external references.

Original Description

Vikunja through 2.4.0 contains a principal-type confusion vulnerability where LinkSharing principals with id N are treated as user principals with users.id == N at three permission checks lacking type guards. Attackers with a link-share JWT can remove victims from teams, enumerate and delete victim bot users, or read team rosters by exploiting id collisions in the autoincrement space.

Database specific

{
    "cwe_ids":  [
        "CWE-639"
    ],
    "github_reviewed":  true,
    "github_reviewed_at":  "2026-10-09T20:43:21Z",
    "nvd_published_at":  "2026-08-19T14:17:47Z",
    "severity":  "HIGH"
}

References

Affected packages

Go / code.vikunja.io/api

Package

Name: code.vikunja.io/api; View open source insights on deps.dev
Purl: pkg:golang/code.vikunja.io/api

Affected ranges

Type: SEMVER
Events: Introduced

0 Unknown introduced version / All previous versions are affected

Last Affected

2.4.0

Database specific

source

"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/08/GHSA-9xwc-vwww-qqmw/GHSA-9xwc-vwww-qqmw.json"