CVE-2026-57458 Vikunja - Broken Access Control

Vikunja 2.3.0 contains a broken access control vulnerability caused by scoped API tokens allowing OAuth authorization code exchange to obtain unrestricted bearer tokens, letting attackers access routes beyond original token scope, exploit requires scoped API token with oauth.authorize permission.

CVSS base score 8.1 /10
High
CISA KEV
Not listed
Public exploit
None known
Authentication
Required
EPSS
0.27% chance of exploitation in 30 days
View the NVD record ↗

Details

Type
Broken Access Control
Impact
Privilege Escalation, Broken Access Control
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N
Published
9 October 2026
Updated
15 October 2026
Weakness
CWE-269

Vendor fix

Update to version 2.4.0 or later.

Patching closes this CVE. It does not tell you which of your systems run the affected version, or what else is exposed alongside them.

References

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