CVE-2026-125749
TaxHacker through 0.8.5 IDOR via Settings Server Actions userId
CVSS Score
4.2
EPSS Score
0.0%
EPSS Percentile
0th
TaxHacker through 0.8.5 contains an insecure direct object reference vulnerability in app/(app)/settings/actions.ts that allows authenticated users to modify other users' data by supplying an arbitrary userId. Attackers can invoke Server Actions like deleteCategoryAction or editFieldAction with a victim's UUID to delete categories, clear transaction assignments, or alter LLM prompts.
| CWE | CWE-639 |
| Vendor | vas3k |
| Product | taxhacker |
| Published | Nov 10, 2026 |
| Last Updated | Nov 10, 2026 |
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CVSS v3 Breakdown
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:L/A:L Attack Vector
Network
Attack Complexity
High
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
Low
Availability
Low
Affected Versions
vas3k / TaxHacker
0 ≤ 0.8.5
References
github.com: https://github.com/vas3k/TaxHacker/issues/204 github.com: https://github.com/vas3k/TaxHacker/commit/d84a912f3a06b141cc275bb07115a204e7f10128 github.com: https://github.com/vas3k/TaxHacker/blob/v0.8.5/app/(app)/settings/actions.ts#L117-L306 hackmd.io: https://hackmd.io/@hieund/taxhacker-settings-crud-actions-cross-user-authz vulncheck.com: https://www.vulncheck.com/advisories/taxhacker-through-0.8.5-idor-via-settings-server-actions-userid hackmd.io: https://hackmd.io/@hieund/cve-2026-125749-taxhacker-settings-crud-actions-cross-user-authz
Credits
hieuPenguinnn