Vulnerability DatabaseCVE-2026-82271
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CVE-2026-82271
Published:August 28, 2026
Updated:September 24, 2026
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.
Related Resources (6)
https://nvd.nist.gov/vuln/detail/CVE-2026-82271
https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/82xxx/CVE-2026-82271.json
https://github.com/SciPhi-AI/R2R/issues/2292
https://www.vulncheck.com/advisories/r2r-missing-ownership-check-allows-modifying-other-users-conversations
https://github.com/SciPhi-AI/R2R
https://github.com/SciPhi-AI/R2R/blob/9c5a94d151f90876bd7eb860f300a8fd662dc481/py/core/main/api/v3/conversations_router.py
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CVSS v4
Base Score:
7.1
Attack Vector
NETWORK
Attack Complexity
LOW
Attack Requirements
NONE
Privileges Required
LOW
User Interaction
NONE
Vulnerable System Confidentiality
NONE
Vulnerable System Integrity
HIGH
Vulnerable System Availability
NONE
Subsequent System Confidentiality
NONE
Subsequent System Integrity
NONE
Subsequent System Availability
NONE
CVSS v3
Base Score:
6.5
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
NONE
Integrity
HIGH
Availability
NONE
Weakness Type (CWE)
Authorization Bypass Through User-Controlled Key
CWE-639
EPSS
Base Score:
0.22