Vulnerability · CVE-2026-33677
Vikunja is an open-source self-hosted task management platform.
Published Mar 24, 2026 · catalog updated Jun 17, 2026 · Vikunja is an open-source
Check if you run it
No confirmed exploitation is on record for CVE-2026-33677. EPSS is 0.41%. Act only if a listed version of Vikunja is an open-source is installed.
Gaps on this record
- The stored product name is a package slug. The name on this page is taken from the title (Vikunja is an open-source).
- No version range is stored. A customer cannot check an installed version against this record.
- No vendor fix or required action is stored. Compare the linked advisory before you change production.
- Severity
- Medium6.5
- Known exploitation
- Not in CISA/VulnCheck KEV
- EPSS
- 0.41%
- Remediation
- Advisory link
- Affected products
- cpe vikunja/vikunja
Vikunja is an open-source self-hosted task management platform. Prior to version 2.2.1, the endpoint returns webhook BasicAuth credentials ( and ) in plaintext to any user with read access to the project. While the existing code correctly masks the HMAC 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.
Are you affected?
Enter the version you run. The result uses only the ranges stored on this record.
The check returns affected, not affected, or incomplete. It does not guess a version that is missing from the record.
- cpe vikunja/vikunjaversion unspecified
How to fix CVE-2026-33677
Recommended remediation
A patch or advisory reference is linked. Open the original publisher for availability by product version.
Official advisories
What to do
Three questions, each answered from this record only. Confirm the vendor advisory before you patch.
Should you patch?
No confirmed exploitation is on record for CVE-2026-33677. EPSS is 0.41%. Act only if a listed version of Vikunja is an open-source is installed.
Which versions are affected?
Affected version ranges are not on this record. Compare the installed version with the linked vendor advisory before you change production.
What should an analyst verify?
CWE-200: Exposure of Sensitive Information. EPSS 0.41%. There is no CISA KEV listing. No Exploit-DB or Metasploit reference is linked. Use the source links for the original advisory.
Code
The project this record applies to. Exploit listings stay in References.
No public source repository is identified for this product.
Timeline
Detection, updates, and resolution for this record.
Mar 24, 2026 · NIST NVD
Detected
Vikunja is an open-source self-hosted task management platform. Prior to version 2.2.1, the endpoint returns webhook BasicAuth credentials ( and ) in plaintext to any user with read access to the project. While the existing code correctly masks the HMAC field, the BasicAuth fields added in a later migration were not given the same treatment. This allows read-only collaborators to steal credentials
Jun 17, 2026 · NIST NVD
Updated
Vikunja is an open-source self-hosted task management platform. Prior to version 2.2.1, the endpoint returns webhook BasicAuth credentials ( and ) in plaintext to any user with read access to the project. While the existing code correctly masks the HMAC field, the BasicAuth fields added in a later migration were not given the same treatment. This allows read-only collaborators to steal credentials
Sources
- CVE.orgVulnerability recordCVE-2026-33677
Official CVE identifier
cve.org - FIRST EPSSExploitation probabilityCVE-2026-33677
30-day exploitation probability 0.4%
first.org - NIST NVDVulnerability recordCVE-2026-33677
Vikunja is an open-source self-hosted task management platform. Prior to version 2.2.1, the endpoint returns webhook BasicAuth credentials ( and ) in plaintext to any user with read access to the proje
nvd.nist.gov
References
Freshness
Last verified in this catalog Oct 18, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.