CVE-2026-123522
Vikunja before 2.7.1 Task Information Disclosure via Kanban Bucket Move Webhook
Vikunja before 2.7.1 contains an authorization bypass vulnerability that allows authenticated users to read any task by injecting a crafted task object into a no-op Kanban bucket move. Attackers can set task.id to a victim task and task.project_id to their own project, routing full task contents to their webhook and forging mention notifications.
Fixes and workarounds
No remediation reported in collected sources.
Missing remediation information is not evidence that no patch exists.
Affected products and versions
| Product | Versions | Authority |
|---|---|---|
| vikunja go-vikunja code.vikunja.io/api
golang |
≥ 0; < 2.7.1 (affected, semver) 2.7.1 (unaffected, semver) Other versions: unaffected |
CNA: VulnCheck |
Version ranges are source assertions. Check the vendor advisory and your installed configuration before determining exposure.
CVSS assessments
| Version / score | Vector | Authority |
|---|---|---|
| 4.0 / 7.1 high |
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:L/VA:N/SC:N/SI:N/SA:N | CNA: VulnCheck |
| 3.1 / 7.1 high |
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:L/A:N | CNA: VulnCheck |
| 4.0 / 7.1 high |
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:L/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X | NVD: [email protected] |
| 3.1 / 7.1 high |
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:L/A:N | NVD: [email protected] |
Exploit evidence
- https://github.com/go-vikunja/vikunja/security/advisories/GHSA-5q33-h98p-rgh9
exploit · ADP: CISA-ADP
References
- https://github.com/go-vikunja/vikunja/security/advisories/GHSA-5q33-h98p-rgh9CNA: VulnCheck · vendor-advisory
- https://www.vulncheck.com/advisories/vikunja-before-2.7.1-task-information-disclosure-via-kanban-bucket-move-webhookCNA: VulnCheck · third-party-advisory
- https://github.com/go-vikunja/vikunja/security/advisories/GHSA-5q33-h98p-rgh9ADP: CISA-ADP · exploit
- https://github.com/go-vikunja/vikunja/security/advisories/GHSA-5q33-h98p-rgh9[email protected]
- https://www.vulncheck.com/advisories/vikunja-before-2.7.1-task-information-disclosure-via-kanban-bucket-move-webhook[email protected]
For agents and automation
Read public disclosures for free as Markdown or JSON. Compatible browsers also expose native WebMCP tools to search disclosures, read this page, and discover API access.
Use the ontology-linked Cyber API with x402 pay per request, or a Y2 Pro or Elite API key with the intel:cyber scope.
Endpoints and access details
https://api.y2.dev/api/v2/cyber/cveshttps://api.y2.dev/api/v2/cyber/cves/{cveId}
A workspace owner or admin can create a Pro or Elite API key. Send Authorization: Bearer <Y2_API_KEY> from your trusted agent runtime.
For x402, omit Authorization and read the HTTP 402 payment challenge before signing a retry. Public browser tools do not make payments.