CVE-2026-120199 PUBLISHED

LearnHouse before 1.1.1 contains a missing authorization vulnerability in the assignment API that allows authenticated users to read other users' grades and submissions. Attackers can supply another user_id to the submissions grade endpoint or query submission read functions to view other students' work, grades and instructor feedback.

• HieuPenguinnn finder

• GitHub Issue #1184
• https://github.com/learnhouse/learnhouse/commit/844a8a7787f0c42d466be604aaf47d296748b1b3
• https://github.com/learnhouse/learnhouse/pull/1187
• https://github.com/learnhouse/learnhouse/blob/1.1.0/apps/api/src/services/courses/activities/assignments.py#L1673
• https://github.com/learnhouse/learnhouse
• VulnCheck Advisory: LearnHouse before 1.1.1 Missing Authorization via Assignment Submissions API

• Authorization Bypass Through User-Controlled Key CWE