KitchenOwl through 0.7.10 IDOR via unchecked category ID

Advisories

KitchenOwl through 0.7.10 IDOR via unchecked category ID

severity: medium
date: 9/27/2026
Affecting: kitchenowl <= 0.7.10
CVE: CVE-2026-101033
CWE: CWE-639 Authorization Bypass Through User-Controlled Key
CVSS: 5.3
CVSS V4 Vector: 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
References: GitHub Issue #1154
https://github.com/TomBursch/kitchenowl/pull/1155
https://github.com/TomBursch/kitchenowl/commit/c15f6cb21a98d5eb70746bee6b63773a6d6a6251
https://github.com/TomBursch/kitchenowl/blob/09aaf5fbd2343fcc10b12e906c63c3764dd38919/backend/app/controller/expense/expense_controller.py#L115-L118
https://github.com/TomBursch/kitchenowl/blob/09aaf5fbd2343fcc10b12e906c63c3764dd38919/backend/app/controller/item/item_controller.py#L86-L88
https://github.com/TomBursch/kitchenowl
Credit: George Chen
Description: KitchenOwl through 0.7.10 fails to verify that category IDs belong to the caller's household in expense and item operations. Authenticated attackers can enumerate category IDs from other households to read their category names, budgets, and colors, breaking household isolation.

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