CVE-2026-82271

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.

CVSS v3 6.5 MEDIUM

6.5^/10

CVSS v3 : MEDIUM

Vector :

Exploitability : 2.8 / Impact : 3.6

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required LOW

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact HIGH

Availability Impact NONE

Scope UNCHANGED

References

Link	Resource
https://github.com/SciPhi-AI/R2R
https://github.com/SciPhi-AI/R2R/blob/9c5a94d151f90876bd7eb860f300a8fd662dc481/py/core/main/api/v3/conversations_router.py
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/issues/2292

Configurations

No configuration.

History

No history.

Information

Published : 2026-08-28 20:20

Updated : 2026-08-31 20:17

NVD link : CVE-2026-82271

Mitre link : CVE-2026-82271

CVE.ORG link : CVE-2026-82271

JSON object : View

Products Affected

No product.

CWE

CWE-639

Authorization Bypass Through User-Controlled Key

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