CVE-2026-33677 json
Webhook BasicAuth Credentials Exposed to Read-Only Project Collaborators via API
published 2026-03-24 7 mo ago modified 2026-06-17 4 mo ago also EUVD-2026-14920 , GHSA-7c2g-p23p-4jg3 , GO-2026-4846
- cvss
- 6.5
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.3%
- EPSS 0.3% chance of exploitation in 30 days, percentile 23%
- public exploits
- 0
- none known
Summary
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.
Patch / fix
- go code.vikunja.io/api 2.2.1
- vikunja vikunja 2.2.1
- govulncheck-vulndb openSUSE Leap 15.6 0.0.20260326T203309-150000.1.155.2
suse advisories SUSE-SU-2026:1135-1
- govulncheck-vulndb openSUSE Leap 16.0 0.0.20260723T184607-160000.1.1
opensuse advisories openSUSE-SU-2026:21483-1
CISA SSVC
- Exploitation
- Proof of concept is public
- Automatable
- no
- Technical impact
- partial
- Assessed
- 7 mo ago
Exploit prediction
0.30% chance of exploitation in the next 30 days, higher than 23% of all scored CVEs (FIRST EPSS, 2026-11-08).
Exploits and checks
- github.com https://github.com/go-vikunja/vikunja/security/advisories/GHSA-7c2g-p23p-4jg3 referenced PoC, tagged "exploit" by a source, unverified
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 3.1 | 6.5 | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N |
| GitHub | 3.1 | 6.5 | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N |
Affected packages
| ecosystem | package | affected | fixed in |
|---|---|---|---|
| go | code.vikunja.io/api | <2.2.1 all versions |
2.2.1 |
Affected products
- go-vikunja vikunja
Classification
- Weakness
-
- CWE-200 Exposure of Sensitive Information to an Unauthorized Actor
References
-
github.com
/go-vikunja/vikunja/security/advisories/GHSA-7c2g-p23p-4jg3
web, exploit, vendor-advisory, advisory
-
vikunja.io
/changelog/vikunja-v2.2.2-was-released
web, release-notes
-
nvd.nist.gov
/vuln/detail/CVE-2026-33677
advisory
-
github.com
/go-vikunja/vikunja
package
Sources
- CVE List CVE-2026-33677
- GitHub Advisory GHSA-7c2g-p23p-4jg3
- NVD CVE-2026-33677
- OSV GO-2026-4846
Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.
CPEs and fixed versions use Anchore's correction of NVD's data: Added CPE configurations because not yet analyzed by NVD.