CVE-2026-91983
5.3
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N
Summary
Vikunja before 2.6.0 contains an API token scope bypass vulnerability in task read endpoints where authorization fails to inspect query string parameters. Attackers with limited token scopes can use the expand parameter to access restricted data like comments, reactions, and time entries without proper permission verification.
Affected Software
| Vendor | Product | Version Range | Status |
|---|---|---|---|
| go-vikunja | vikunja | 1.0.0 < 2.6.0 | affected |
| go-vikunja | vikunja | 2.6.0 | unaffected |
Weaknesses
- CWE-863: Incorrect Authorization
ADP Enrichment
CISA ADP Vulnrichment
- SSVC:
- Exploitation: poc
- Automatable: no
- Technical Impact: partial
Additional References
References
- https://github.com/go-vikunja/vikunja/security/advisories/GHSA-9rg3-v78m-26q8
- https://www.vulncheck.com/advisories/vikunja-before-2.6.0-api-token-scope-bypass-via-expand-parameter
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