What is CVE-2026-123513?

CVE-2026-123513 is a medium-severity vulnerability in Go-Vikunja Vikunja, classified under Insertion of Sensitive Information into Sent Data. CVSS score: 6.8/10. Published 2026-11-08.

How severe is CVE-2026-123513?

Medium severity. CVSS v3 base score is 6.8 out of 10.

Vulnerability in Go-Vikunja Vikunja

CVE-2026-123513

Vikunja before 2.7.1 contains a credential exposure vulnerability that allows attackers to steal stored auth tokens by inducing users to switch the frontend API URL. Because checkAndSetApiUrl leaves origin-independent localStorage tokens in place, the bearer token and desktop OAuth refresh token are sent to the attacker's server, enabling account takeover.

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

CVSS v3 metric

CVSS v3 base score 6.8 (Medium). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/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-201 — Insertion of Sensitive Information into Sent Data

References

GitHub Security Advisory (GHSA-rj93-wmch-2crq) (vendor-advisory)
VulnCheck Advisory: Vikunja before 2.7.1 Auth Token Leak via API URL Change (third-party-advisory)

Frequently asked questions

What is CVE-2026-123513?: CVE-2026-123513 is a medium-severity vulnerability in Go-Vikunja Vikunja, classified under Insertion of Sensitive Information into Sent Data. CVSS score: 6.8/10. Published 2026-11-08.
How severe is CVE-2026-123513?: Medium severity. CVSS v3 base score is 6.8 out of 10.