IDOR in Khoj Notion OAuth Callback Enables Account Hijacking

Publication date: 2026-02-02

Last updated on: 2026-02-27

Assigner: GitHub, Inc.

Description

Khoj is a self-hostable artificial intelligence app. Prior to 2.0.0-beta.23, an IDOR in the Notion OAuth callback allows an attacker to hijack any user's Notion integration by manipulating the state parameter. The callback endpoint accepts any user UUID without verifying the OAuth flow was initiated by that user, allowing attackers to replace victims' Notion configurations with their own, resulting in data poisoning and unauthorized access to the victim's Khoj search index. This attack requires knowing the user's UUID which can be leaked through shared conversations where an AI generated image is present. This vulnerability is fixed in 2.0.0-beta.23.

CVSS Scores

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Meta Information

Published

2026-02-02

Last Modified

2026-02-27

Generated

2026-07-06

AI Q&A

2026-02-03

EPSS Evaluated

2026-07-05

NVD

CVE-2025-69207

Affected Vendors & Products

Vendor	Product	Version / Range
khoj	khoj	to 2.0.0 (exc)
khoj	khoj	2.0.0
khoj	khoj	2.0.0
khoj	khoj	2.0.0
khoj	khoj	2.0.0
khoj	khoj	2.0.0
khoj	khoj	2.0.0
khoj	khoj	2.0.0
khoj	khoj	2.0.0
khoj	khoj	2.0.0
khoj	khoj	2.0.0
khoj	khoj	2.0.0
khoj	khoj	2.0.0
khoj	khoj	2.0.0
khoj	khoj	2.0.0
khoj	khoj	2.0.0

Helpful Resources

Exploitability

CWE

KEV

CWE ID	Description
CWE-639	The system's authorization functionality does not prevent one user from gaining access to another user's data or record by modifying the key value identifying the data.

Attack-Flow Graph

Executive Summary

This vulnerability is an Insecure Direct Object Reference (IDOR) in the Notion OAuth callback of the Khoj app before version 2.0.0-beta.23. It allows an attacker to hijack any user's Notion integration by manipulating the state parameter. The callback endpoint accepts any user UUID without verifying that the OAuth flow was initiated by that user. Attackers who know a user's UUID, which can be leaked through shared conversations containing AI-generated images, can replace the victim's Notion configurations with their own.

Impact Analysis

This vulnerability can lead to unauthorized access to a victim's Khoj search index and data poisoning by allowing attackers to hijack and replace the victim's Notion integration configurations. This compromises the integrity and confidentiality of the victim's data within Khoj.

Mitigation Strategies

Upgrade Khoj to version 2.0.0-beta.23 or later, where the IDOR vulnerability in the Notion OAuth callback is fixed.

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