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Vulnerabilities

Vulnerability · CVE-2026-35600

Vikunja is an open-source self-hosted task management platform.

Published Apr 10, 2026 · catalog updated Jun 17, 2026 · Vikunja is an open-source

Check if you run it

No confirmed exploitation is on record for CVE-2026-35600. EPSS is 0.31%. 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
Medium5.4
Known exploitation
Not in CISA/VulnCheck KEV
EPSS
0.31%
Remediation
Advisory link
Affected products
cpe vikunja/vikunja

Vikunja is an open-source self-hosted task management platform. Prior to 2.3.0, task titles are embedded directly into Markdown link syntax in overdue email notifications without escaping Markdown special characters. When rendered by goldmark and sanitized by bluemonday (which allows and tags), injected Markdown constructs produce phishing links and tracking pixels in legitimate notification emails. This vulnerability is fixed in 2.3.0.

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-2026-35600

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-2026-35600. EPSS is 0.31%. 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-79: Cross-site Scripting (XSS). EPSS 0.31%. 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.

Timeline

Detection, updates, and resolution for this record.

  1. Apr 10, 2026 · NIST NVD

    Detected

    Vikunja is an open-source self-hosted task management platform. Prior to 2.3.0, task titles are embedded directly into Markdown link syntax in overdue email notifications without escaping Markdown special characters. When rendered by goldmark and sanitized by bluemonday (which allows and tags), injected Markdown constructs produce phishing links and tracking pixels in legitimate notification email

  2. Jun 17, 2026 · NIST NVD

    Updated

    Vikunja is an open-source self-hosted task management platform. Prior to 2.3.0, task titles are embedded directly into Markdown link syntax in overdue email notifications without escaping Markdown special characters. When rendered by goldmark and sanitized by bluemonday (which allows and tags), injected Markdown constructs produce phishing links and tracking pixels in legitimate notification email

Sources

  • CVE.orgVulnerability recordCVE-2026-35600

    Official CVE identifier

    cve.org
  • FIRST EPSSExploitation probabilityCVE-2026-35600

    30-day exploitation probability 0.3%

    first.org
  • NIST NVDVulnerability recordCVE-2026-35600

    Vikunja is an open-source self-hosted task management platform. Prior to 2.3.0, task titles are embedded directly into Markdown link syntax in overdue email notifications without escaping Markdown special characters. When rendered by goldmark and sanitized by bluemonday (which al

    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.