CVE-2026-82271
R2R Missing Ownership Check Allows Modifying Other Users' Conversations
- State
- Published
- Severity
- 7.1 High
- Published
- Aug 28, 2026
- Updated
- Sep 24, 2026
- Reserved
- Aug 28, 2026
Description
R2R through 3.6.5 fails to properly validate user ownership in conversation update and message handlers, allowing authenticated users to modify other users' conversations. Attackers can supply arbitrary conversation identifiers to rename conversations and append messages to other users' conversation histories, corrupting state and injecting malicious content.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 4.0 | 7.1 High | CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N | VulnCheck |
| 3.1 | 6.5 Medium | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N | VulnCheck |
Weaknesses
- CWE-639 Authorization Bypass Through User-Controlled Key
Affected Products
| Product | Versions |
|---|---|
R2RSciPhi-AI |
|
References
- GitHub Issue #2292issue-tracking
- https://github.com/SciPhi-AI/R2Rproduct
- Vulnerable code: conversations_router.pytechnical-description
- VulnCheck Advisory: R2R Missing Ownership Check Allows Modifying Other Users' Conversationsthird-party-advisory
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