What is CVE-2026-123493?

CVE-2026-123493 is a medium-severity vulnerability in Go-Vikunja Vikunja, classified under Insufficient Session Expiration. CVSS score: 5.4/10. Published 2026-11-08.

How severe is CVE-2026-123493?

Medium severity. CVSS v3 base score is 5.4 out of 10.

Vulnerability in Go-Vikunja Vikunja

CVE-2026-123493

Vikunja from 2.4.0 before 2.7.1 contains an authentication bypass vulnerability that allows disabled or locked users to retain access through API tokens owned by their bot users. Because token validation only checks the bot's own status, attackers holding pre-minted bot tokens can keep reading and modifying shared projects via the HTTP API, CalDAV, MCP and feeds.

Published 2026-11-08 · last modified 2026-11-08.

CVSS v3 metric

CVSS v3 base score 5.4 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N.

EPSS exploit prediction

No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.

Affected products

Go-Vikunja Vikunja

Weakness classification (CWE)

CWE-613 — Insufficient Session Expiration

References

GitHub Security Advisory (GHSA-5fc2-w2j4-6r8w) (vendor-advisory)
VulnCheck Advisory: Vikunja from 2.4.0 before 2.7.1 Authentication Bypass via Bot API Tokens (third-party-advisory)

Frequently asked questions

What is CVE-2026-123493?: CVE-2026-123493 is a medium-severity vulnerability in Go-Vikunja Vikunja, classified under Insufficient Session Expiration. CVSS score: 5.4/10. Published 2026-11-08.
How severe is CVE-2026-123493?: Medium severity. CVSS v3 base score is 5.4 out of 10.