Answer in brief
CVE-2026-91970 records a High severity (CVSS 6.5) vulnerability in Vikunja before 2.6.0 Resource Exhaustion via Planka Migration. The current sources do not mark it as known exploited. The current feed maps go-vikunja/vikunja (generic), code.vikunja.io/api (go), code.vikunja.io/api (go), code.vikunja.io/api (go). Check affected ranges and fixed versions before updating.
Analysis pending evidence review
HOL Guard separates source facts from reviewed analysis. See the methodology.
CVSS is 6.5. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.
Analysis status
Analysis pending evidence review
Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.
The current feed maps go-vikunja/vikunja (generic), code.vikunja.io/api (go), code.vikunja.io/api (go), code.vikunja.io/api (go). Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| go-vikunja/vikunjageneric | >=0 <2.6.0 | 2.6.0 |
| code.vikunja.io/apigo | >=2.5.0,<2.6.0 | 2.6.0 |
| code.vikunja.io/apigo | >=2.5.0 <2.6.0 | 2.6.0 |
| code.vikunja.io/apigo | >=0 | Not reported |
Published upstream
Sep 15, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Oct 19, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Sep 15, 2026
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.
Quoted source text, attributed separately from HOL analysis.