GHSA-9jrx-vmh8-c6xw

Suggest an improvement
Source
https://github.com/advisories/GHSA-9jrx-vmh8-c6xw
Import Source
https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/08/GHSA-9jrx-vmh8-c6xw/GHSA-9jrx-vmh8-c6xw.json
JSON Data
https://api.osv.dev/v1/vulns/GHSA-9jrx-vmh8-c6xw
Withdrawn
2026-10-09T20:42:06Z
Published
2026-08-02T15:30:21Z
Modified
2026-10-09T21:00:04Z
Severity
  • 8.1 (High) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N CVSS Calculator
  • 8.6 (High) CVSS_V4 - CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:N/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 ID collision allows cross-account API token issuance and management
Details

Duplicate Advisory

This advisory has been withdrawn because it is a duplicate of GHSA-vvcv-vpph-h844. This link is maintained to preserve external references.

Original Description

Vikunja versions 0.22.0 through 2.3.0 fail to validate the principal type in API token management. Because user IDs and link-share IDs are independent numeric sequences and both resolve through a generic web.Auth.GetID() interface, a link-share JWT whose numeric ID equals a target user's ID is treated as that user by the /api/v1/tokens endpoints. An authenticated attacker can obtain a target's numeric user ID via authenticated user search, then create link shares on an attacker-writable project until the link-share sequence reaches that value, and use the resulting link-share JWT to list, create, and delete the target user's API tokens (including issuing a new token with attacker-chosen scopes under the target's permissions). Fixed in version 2.4.0.

Database specific 
{
    "cwe_ids":  [
        "CWE-863"
    ],
    "github_reviewed":  true,
    "github_reviewed_at":  "2026-10-09T20:42:06Z",
    "nvd_published_at":  "2026-08-02T13:16:54Z",
    "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
0.22.0
Last Affected
2.3.0

Database specific

source 
"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/08/GHSA-9jrx-vmh8-c6xw/GHSA-9jrx-vmh8-c6xw.json"