CVE-2026-110611
MEDIUMCVSS 5.9Description
REBUILD through 4.5.0 contains an authorization bypass vulnerability in AiBot2Controller /aibot2 endpoints that act on a caller-supplied chatid without verifying ownership. Authenticated low-privilege users can supply another user's chatid to chat-init, chat-delete, chat-feedback, or chat-stream-stop to read, delete, exfiltrate, or interrupt AI assistant conversations.
Timeline
Published:October 14th, 2026 3:17 PM
Last modified:October 20th, 2026 2:17 AM
CVSS Scoring
CVSS v3: 5.9 (MEDIUM)
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:L/A:N
Weaknesses (CWE)
References & Reports
Advisories, patches, and third-party reports
- https://github.com/getrebuild/rebuild/blob/48c6cc42f9c331cc57c057fa9c66d6cbda990131/src/main/java/com/rebuild/core/aibot2/ChatManager.java#L99-L101
- https://github.com/getrebuild/rebuild/blob/48c6cc42f9c331cc57c057fa9c66d6cbda990131/src/main/java/com/rebuild/web/aibot/AiBot2Controller.java#L151-L203
- https://hackmd.io/@1ExmmukzRMWN7B4gQ4W-4Q/getrebuild-rebuild-aibot-chat-idor
- https://www.vulncheck.com/advisories/rebuild-through-4.5.0-authorization-bypass-via-aibot2-chat-endpoints-chatid
- https://hackmd.io/@1ExmmukzRMWN7B4gQ4W-4Q/getrebuild-rebuild-aibot-chat-idor
Source: NIST NVD · Data may lag official sources by up to one minute