CVE-2026-82271

Published: Aug 28, 2026Modified: Aug 31, 2026

7.1

Vector

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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:XShow less

Source: disclosure@vulncheck.com (Secondary)

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.

Related CWEs

CWE-639

Authorization Bypass Through User-Controlled Key

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.

References (5)

https://github.com/SciPhi-AI/R2R

Source: disclosure@vulncheck.com

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

Source: disclosure@vulncheck.com

https://github.com/SciPhi-AI/R2R/issues/2292

Source: disclosure@vulncheck.com

https://www.vulncheck.com/advisories/r2r-missing-ownership-check-allows-modifying-other-users-conversations

Source: disclosure@vulncheck.com

https://github.com/SciPhi-AI/R2R/issues/2292

Source: 134c704f-9b21-4f2e-91b3-4a467353bcc0

Timeline

No history available yet.