CVE-2026-57458CWE-269privilege-escalation

CVE-2026-57458

High · published October 10, 2026

CVSS v3.1
8.1
EPSS
0%
Percentile
17.5
In the wild
Unconfirmed
What it is

Vikunja is an open-source self-hosted task management platform. In version 2.3.0, a scoped API token limited to the `oauth.authorize` permission can call `POST /api/v1/oauth/authorize`, obtain an OAuth authorization code, and exchange the code at `POST /api/v1/oauth/token` for a normal bearer JSON Web Token (JWT) and refresh token. The resulting credentials are not restricted by the original API token's permissions, allowing access to routes outside its declared scope for the same user. Version 2.4.0 fixes the vulnerability.

The record
Technical detail
CVSS v3.1
8.1 · HIGH
Vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N
CVSS v4.0
Not supplied
EPSS
0.00265 · 17.5th percentile
Weakness
CWE-269 · Improper Privilege Management
Published
2026-10-10T01:17Z
References (4)
https://github.com/go-vikunja/vikunja/commit/4ae2e093014881052ed8f8ecd8bcb9adf83dd276 · [email protected]https://github.com/go-vikunja/vikunja/releases/tag/v2.4.0 · [email protected]https://github.com/go-vikunja/vikunja/security/advisories/GHSA-v3p6-34mc-hj7v · [email protected]https://github.com/go-vikunja/vikunja/security/advisories/GHSA-v3p6-34mc-hj7v · 134c704f-9b21-4f2e-91b3-4a467353bcc0
EPSS history
Timeline
  • 11 OCT 03:30Z
    EPSS moved — → 0%
    epss
  • 09 OCT 20:46Z
    Vikunja: Scoped API token can mint unrestricted OAuth session credentials
    cvelistv5
  • 09 OCT 20:46Z
    Vikunja: Scoped API token can mint unrestricted OAuth session credentials
    cvelistv5