CVE-2026-91970 Details
Description
Vikunja versions before 2.6.0 contain a resource exhaustion vulnerability in the Planka migrator that fails to enforce aggregate memory budgets during migration jobs. Authenticated attackers can submit migration requests pointing to attacker-controlled servers advertising numerous size-compliant attachments, exhausting worker memory and causing denial of service for all users.
A resource exhaustion vulnerability has been identified in Vikunja versions prior to 2.6.0, specifically within the Planka migrator. This vulnerability arises because the migrator does not properly manage memory budgets during migration tasks. Authenticated attackers can exploit this by sending migration requests to servers they control, which then deliver a large number of attachments that comply with size limits. This leads to excessive memory use, causing a denial-of-service condition that affects all users.
Users are advised to update Vikunja to version 2.6.0 or later, where this vulnerability has been patched.
Metrics
CVSS 4.0 Severity and Vector Strings:
VolerionCVSS 3.x Severity and Vector Strings:
No data available for CVSS Version 2.0 on this CVE.
Volerion
Assessed Sep 15, 2026CISA-ADP
Assessed Sep 15, 2026References to Advisories, Solutions, and Tools
By selecting these links, you will be leaving this site. These are references gathered from the official CVE record and are not endorsed by Volerion.
| URL | Source(s) | Tag(s) |
|---|---|---|
| https://github.com/go-vikunja/vikunja/security/advisories/GHSA-wq92-8x3r-fm38 | CISA-ADP | AdvisoryExploitRemedyVendor |
| https://github.com/go-vikunja/vikunja/security/advisories/GHSA-wq92-8x3r-fm38 | [email protected] | AdvisoryExploitRemedyVendor |
| https://www.vulncheck.com/advisories/vikunja-before-2.6.0-resource-exhaustion-via-planka-migration | [email protected] | Advisory |
Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| CWE-770 | Allocation of Resources Without Limits or Throttling | [email protected] |
Affected Products
| Product | Versions |
|---|---|
| Vikunja | >= 0, < 2.6.0 |
CPE
Remediation
| |
Change History
2 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Sep 15, 2026 | CVE Modified | CISA-ADP |
| Sep 15, 2026 | New CVE Received | [email protected] |