What is CVE-2026-123504?

CVE-2026-123504 is a medium-severity vulnerability in Go-Vikunja Vikunja, classified under Information Disclosure. CVSS score: 4.3/10. Published 2026-11-08.

How severe is CVE-2026-123504?

Medium severity. CVSS v3 base score is 4.3 out of 10.

Information disclosure in Go-Vikunja Vikunja

CVE-2026-123504

Vikunja from 0.22.0 before 2.7.1 contains an information disclosure vulnerability that allows read-only project members to view full webhook target URLs by listing project webhooks. Attackers can extract incoming-webhook tokens or API keys embedded in target_url values to post to receiving channels or reuse keys until rotated.

Vulnerability class: Information Disclosure

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

CVSS v3 metric

CVSS v3 base score 4.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N.

EPSS exploit prediction

EPSS: 0.002 (13.0th percentile), scored 2026-11-09.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 13th percentile — 13.0% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

The 30-day trend appears once there are two daily scores.

Affected products

Go-Vikunja Vikunja

Weakness classification (CWE)

CWE-200 — Information Disclosure

References

github.com/go-vikunja/vikunja/security/advisories/GHSA-586f-48mj-3rwr (vendor-advisory)
www.vulncheck.com/advisories/vikunja-0.22.0-before-2.7.1-webhook-url-credential… (third-party-advisory)

Frequently asked questions

What is CVE-2026-123504?: CVE-2026-123504 is a medium-severity vulnerability in Go-Vikunja Vikunja, classified under Information Disclosure. CVSS score: 4.3/10. Published 2026-11-08.
How severe is CVE-2026-123504?: Medium severity. CVSS v3 base score is 4.3 out of 10.