Vikunja: Webhooks and link shares survive every revocation path, so a removed collaborator keeps a live feed

Exploitation

No confirmed exploitation recorded. Patch Next marks exploitation only from CISA KEV.

CVSS

6.5 · CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N

EPSS

• CVE-2026-111919: 0.36% estimated exploitation activity in the next 30 days; percentile 29.30 (FIRST EPSS, 2026-11-03). This is a model estimate, not proof of exploitation or customer exposure.

As published by the source; long descriptions are shortened.

Summary A collaborator removed from a project keeps a live, automatic feed of that project's contents, because nothing on any revocation path deletes the webhook they created while they had access. Vikunja already has a revocation-cleanup routine that deletes other derived rows for exactly this reason. Its set is {taskassignees, subscriptions}. webhooks and linkshares — the only two rows that carry a live channel into the project — are not in it, and the routine is wired to one of four revocation paths. Details pkg/models/teams.go:411 — cleanupTaskMembersAfterTeamRemoval, added in 9358954c9, whose commit message states the invariant: "cleanup team memberships, assignments and subscriptions when users lose access to a project". So you have already decided that losing read access must delete rows the departing user left behind, and that the test is a live project.CanRead. The gap is which rows are in the set. And there is a second level, which is the sharper one. That routine has…

Published by the source

9 Oct 2026, 20:57 UTC

Last modified by the source

19 Oct 2026, 21:40 UTC

Source last checked

26 Oct 2026, 15:32 UTC

1. Revision 3 · amended · 26 Oct 2026

   Amended from ghsa record GHSA-hjx8-qv73-f7cm

2. Revision 2 · amended · 24 Oct 2026

   Amended from osv record GO-2026-6733

3. Revision 1 · created · 24 Oct 2026

   Published from osv record GHSA-hjx8-qv73-f7cm

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# Patch Next advisory brief: CVE-2026-111919

Advisory: Vikunja: Webhooks and link shares survive every revocation path, so a removed collaborator keeps a live feed
IDs: CVE-2026-111919, GHSA-hjx8-qv73-f7cm
Record: https://patchnext.com/advisories/cve-2026-111919 (revision 3, source checked 26 Oct 2026, 15:32 UTC)
Inventory: none attached. This brief comes from a public page and does not say whether any deployment is affected.
Severity: Medium (CVSS 6.5)
Exploitation: no confirmed exploitation recorded. Patch Next confirms exploitation only from CISA KEV.
Vendor response: Vendor response not established. A vendor fix does not mean a deployment is fixed.

## Affected components
- Go code.vikunja.io/api: affected >= 0.22.0, <= 2.6.0

## Suggested inspection (read-only)
- Go code.vikunja.io/api: check the installed version with your package manager.

## Supported action
No complete vendor fix is recorded. Follow the primary source's mitigation guidance and check this record again before closing anything.

## Required regression checks
- Run the test suite and a production build.
- Exercise the features that depend on code.vikunja.io/api.
- Repeat the inspection and confirm that only fixed versions remain installed.

## Rollback considerations
- Keep the previous lockfile and deployment artifact. Rolling back reinstates the vulnerable version, so apply any documented mitigation while you fix forward.

## Unresolved questions
- Which deployments run an affected version?
- Exploitation status can change. Check again before lowering the priority.
- Mark the work resolved only after the fixed version is verified in production.

## Sources
- Verified: https://osv.dev/vulnerability/GO-2026-6733 (OSV record GO-2026-6733 lists affected ranges: Go code.vikunja.io/api >=0.22.0)
- Verified: https://osv.dev/vulnerability/GHSA-hjx8-qv73-f7cm (OSV record GHSA-hjx8-qv73-f7cm lists affected ranges: Go code.vikunja.io/api >=0.22.0 <=2.6.0)
- Verified: https://github.com/advisories/GHSA-hjx8-qv73-f7cm (GitHub-reviewed advisory GHSA-hjx8-qv73-f7cm lists affected ranges: Go code.vikunja.io/api >=0.22.0 <=2.6.0)

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