CVE-2026-33677 Webhook BasicAuth Credentials Exposed to Read-Only Project Collaborators via API
Read-only collaborators can view plaintext BasicAuth credentials for webhooks via the API, exposing secrets intended for external receivers.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-33677?
CVE-2026-33677 is a medium-severity vulnerability in go-vikunja vikunja, published on 24 Mar 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
Vikunja is an open-source self-hosted task management platform. Prior to version 2.2.1, the `GET /api/v1/projects/:project/webhooks` endpoint returns webhook BasicAuth credentials (`basic_auth_user` and `basic_auth_password`) in plaintext to any user with read access to the project. While the existing code correctly masks the HMAC `secret` field, the BasicAuth fields added in a later migration were not given the same treatment. This allows read-only collaborators to steal credentials intended for authenticating against external webhook receivers. Version 2.2.1 patches the issue.
Weakness: CWE-200
Which versions are affected by CVE-2026-33677?
3 open source packages ship an affected version, including code.vikunja.io/api. It affects 1 product.
| Package | Affected | Fixed in |
|---|---|---|
code.vikunja.io/api Go | All versions | None |
code.vikunja.io/api Go | All versions | 2.2.1 |
code.vikunja.io/api Go | All versions | 2.2.1 |
Products include Vikunja Vikunja.
How do I fix CVE-2026-33677?
Upgrade code.vikunja.io/api to 2.2.1 or later.
Is CVE-2026-33677 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-33677 exists.
Other vulnerabilities in go-vikunja vikunja
- CVE-2026-28268 Vikunja Vulnerable to Account Takeover via Password Reset Token Reuse
- CVE-2026-27575 Vijkunja has Weak Password Policy Combined with Persistent Sessions After Password Change
- CVE-2026-25935 Vikunja Affected by XSS Via Task Preview
- CVE-2026-35595 Vikunja Affected by Privilege Escalation via Project Reparenting
- CVE-2026-33316 Vikunja’s Improper Access Control Enables Bypass of Administrator-Imposed Account Disablement
Sources
Also known as GHSA-7c2g-p23p-4jg3, GO-2026-4846.