Is CVE-2026-123504 exploited in the wild?

No. Junglewise Threat Intelligence has no report of CVE-2026-123504 being exploited in the wild.

How severe is CVE-2026-123504?

Medium severity, with a CVSS score of 4.3, published 8 November 2026.

Is there a fix for CVE-2026-123504?

Yes: fixed in 2.7.1. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

How is CVE-2026-123504 attacked?

It is attacked over the network, in a web application.

Am I affected by CVE-2026-123504?

Check whether you run Vikunja at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

CVE-2026-123504: Vikunja information disclosure in webhook URLs

CVE-2026-123504 · Severity: medium · CVSS 4.3 · Published 2026-11-08

Vikunja is a project management and task organization platform. Read-only project members can view complete webhook target URLs, which often contain embedded API keys or authentication tokens. An attacker with read-only access can extract these credentials and use them to post messages to external services or reuse the keys until they are rotated.

Technologies: Vikunja. Vendors: Vikunja.

Quick answers

Is CVE-2026-123504 exploited in the wild?: No. Junglewise Threat Intelligence has no report of CVE-2026-123504 being exploited in the wild.
How severe is CVE-2026-123504?: Medium severity, with a CVSS score of 4.3, published 8 November 2026.
Which products and versions are affected?: Vikunja 0.22.0 to 2.7.0.
Is there a fix for CVE-2026-123504?: Yes: fixed in 2.7.1. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.
How is CVE-2026-123504 attacked?: It is attacked over the network, in a web application.
Am I affected by CVE-2026-123504?: Check whether you run Vikunja at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

How to fix

Fixed in: 2.7.1

Technical details

The vulnerability is an authorization bypass (CWE-863) and information disclosure (CWE-200) in the webhook listing functionality. The ReadAll and CanRead methods in the webhook permissions layer check only for Project.CanRead instead of Project.CanWrite, allowing read-only members to retrieve full target URLs. While maskCredentials() strips basic-auth and secret fields, it does not redact the TargetURL itself, which commonly embeds API tokens and webhook credentials.

Affected products

Vikunja Vikunja 0.22.0 to 2.7.0

Timeline

2026-10-22: disclosed
2026-11-08: advisory

References

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