What is CVE-2026-123515?

CVE-2026-123515 is a medium-severity vulnerability in Go-Vikunja Vikunja, classified under Unintended Proxy or Intermediary (Confused Deputy). CVSS score: 4.1/10. Published 2026-11-08.

How severe is CVE-2026-123515?

Medium severity. CVSS v3 base score is 4.1 out of 10.

Vulnerability in Go-Vikunja Vikunja

CVE-2026-123515

Vikunja before 2.7.1 contains a client-side request forgery vulnerability that allows users with write access to make viewers' clients request loopback or LAN addresses by storing img elements in rich text. Attackers can plant images in tasks, comments, project descriptions, or imported Markdown to trigger blind GET requests against local services and track when viewers open content.

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

CVSS v3 metric

CVSS v3 base score 4.1 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:N/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-441 — Unintended Proxy or Intermediary (Confused Deputy)

References

GitHub Security Advisory (GHSA-2f75-93c9-xf32) (vendor-advisory)
VulnCheck Advisory: Vikunja before 2.7.1 Client-Side Request Forgery via Stored Rich-Text Images (third-party-advisory)

Frequently asked questions

What is CVE-2026-123515?: CVE-2026-123515 is a medium-severity vulnerability in Go-Vikunja Vikunja, classified under Unintended Proxy or Intermediary (Confused Deputy). CVSS score: 4.1/10. Published 2026-11-08.
How severe is CVE-2026-123515?: Medium severity. CVSS v3 base score is 4.1 out of 10.