CVE-2026-35599: vikunja · Inefficient Algorithmic Complexity
Affects vikunjaSource CVE Database V5
Not known to be exploited · CVSS 6.5 Medium : upgrade to 2.3.0 when convenient.
Data as of 30 Oct 2026, 11:52 UTC
- EPSS
- 0.3% chance of exploitation in 30 days – higher than 28% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
- Patch
- Available – fixed in 2.3.0
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:HExploitation evidence
Disclosed: evidence found.
CVE published 10 Apr 2026
Detectable: no evidence on record.
No public nuclei template indexed
Weaponized: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors
A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 30 Oct 2026.
What to do
Upgrade vikunja and github.com/go-vikunja/vikunja to 2.3.0.
Affected software
| Product | Affected | Fixed in |
|---|---|---|
| go-vikunjavikunja | Affected
| Fixed in
|
Gogithub.com/go-vikunja/vikunjapkg:golang/github.com/go-vikunja/vikunjaOther threats | Affected
| Fixed in
|
Check your own hosts for these packages with threat-finder (opens in a new tab), our free open-source scanner.
AI-suggested
Upgrade to vikunja version 2.3.0 or later, where this vulnerability is fixed. Patch status is not explicitly confirmed beyond the version fix note, so check vendor advisories for current remediation guidance.
Description
Vikunja is an open-source self-hosted task management platform. Prior to 2.3.0, the addRepeatIntervalToTime function uses an O(n) loop that advances a date by the task's RepeatAfter duration until it exceeds the current time. By creating a repeating task with a 1-second interval and a due date far in the past, an attacker triggers billions of loop iterations, consuming CPU and holding a database connection for minutes per request. This vulnerability is fixed in 2.3.0.
References
- github.com/go-vikunja/vikunja/security/advisories/GHSA-r4fg-73rc-hhh7 (opens in a new tab)
- github.com/go-vikunja/vikunja/pull/2577 (opens in a new tab)
- github.com/go-vikunja/vikunja/commit/6df0d6c8f54b01db6464c42810e40e55f12b481b (opens in a new tab)
- github.com/go-vikunja/vikunja/releases/tag/v2.3.0 (opens in a new tab)