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TI-2026-48322 Aliases CVE-2026-68582GHSA-p4r4-8cxw-pjx7GHSA-rj9j-8772-4h6c

Vikunja 0.24.0 Broken Object Level Authorization via Link-Share Token

Priority HIGH 73CWE-639Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
Low
Attack requirements
None
Impact type
Security bypass
Confidentiality · integrity · availability
High · High · High
Fix status
Fixed

Attack profile from CVSS 4.0 · CNA. Fix status from CNA and GitHub. Impact type from CWE-639.

Summary

Vikunja versions >= 0.24.0 and <= 2.3.0 contain a broken object level authorization (BOLA) vulnerability in the task-collection endpoint (GET /api/v1/projects/{project}/views/{view}/tasks). The endpoint loads the requested project view from the URL path without verifying the caller is authorized for it. For a link-share token holder, the task scope is pinned to the share's own project, but the view is taken from the attacker-controlled path and never re-validated. As a result, a holder of any project share link can read any other tenant's kanban bucket records — bucket titles and the full created_by user object (username, name, id) — for every view in the instance. The same missing pre-authorization view load also creates a project/view-ID existence oracle (404 vs. non-404) usable by link shares and ordinary authenticated users. Task contents remain constrained to the share's own project and are not disclosed. Fixed in 2.4.0.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.0033 26th percentileScored 2026-11-07
Fix Fixed vikunja (go-vikunja): 2.4.0code.vikunja.io/api (Go): 2.4.0

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
Poc
Automatable
No
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
go-vikunjavikunja0.24.0 to before 2.4.02.4.0Patch availableCNA
—code.vikunja.io/api (Go)0.24.0 to before 2.4.02.4.0Patch availableGHSA-rj9j-8772-4h6c
  • vikunja Vendorgo-vikunja Affected 0.24.0 to before 2.4.0 Fixed in 2.4.0 Patch available CNA
  • code.vikunja.io/api (Go) Vendor— Affected 0.24.0 to before 2.4.0 Fixed in 2.4.0 Patch available GHSA-rj9j-8772-4h6c

CPE names Threatist (inferred) · 1

Inferred from how NVD named this product before; not given by a source.

CPEVersionsRoleVendor
cpe:2.3:a:vikunja:vikunja:*:*:*:*:*:*:*:*——go-vikunja
  • cpe:2.3:a:vikunja:vikunja:*:*:*:*:*:*:*:* Versions — — ·go-vikunja

Remediation

  • Fix · CNA vikunja (go-vikunja) Fixed in 2.4.0
  • Fix · GHSA-rj9j-8772-4h6c code.vikunja.io/api (Go) Fixed in 2.4.0 Advisory →

Fixed in the same release

Records fixed by the same vendor advisory or release, as the CNA lists them.

  • Release ·

    go-vikunja vikunja 2.4.0

    2 records Highest priority Priority HIGH 2 HIGH

    Other records, highest priority first

    • TI-2026-48321 Vikunja 0.22.0 through 2.3.0 Authentication Bypass via Principal ID CollisionPriority HIGH 72
    Show all 2 records →

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-68582
  2. 2026-10-03 Alias added: GHSA-p4r4-8cxw-pjx7
  3. 2026-10-10 Alias added: GHSA-rj9j-8772-4h6c
  4. 2026-10-10 Fix available: Go/code.vikunja.io/[email protected] · GHSA-rj9j-8772-4h6c
  5. 2026-10-10 CVSS score added · GHSA-rj9j-8772-4h6c
  6. 2026-10-10 Weakness changed · GHSA-rj9j-8772-4h6c
  7. 2026-10-10 4 new references · GHSA-rj9j-8772-4h6c

References

Advisory 2

Other 2

  • TI-2026-40929 Authorization bypass in go-vikunja Vikunja CVSS 4.0CRITICAL 9.3
  • TI-2026-21967 Vijkunja has Weak Password Policy Combined with Persistent Sessions After Password Change CVSS 3.1CRITICAL 9.1
  • TI-2026-62115 Vikunja before 2.6.0 Privilege Escalation via Link Share Hash CVSS 4.0HIGH 8.7
  • TI-2026-62108 Vikunja before 2.6.0 Authentication Bypass via CalDAV BasicAuth CVSS 4.0HIGH 8.7
  • TI-2026-62107 Vikunja before 2.6.0 Authentication Bypass via Unthrottled API CVSS 4.0HIGH 8.7
  • TI-2026-26971 Vikunja ahs a TOTP Two-Factor Authentication Bypass via OIDC Login Path CVSS 3.1CRITICAL 9.1
See all 105 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences