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CVE-2026-82271

R2R Missing Ownership Check Allows Modifying Other Users' Conversations

CVSS 4.0 7.1 HIGHCVSS 3.1 6.5 MEDIUMCheck source for fixed versionsKEV status unknown

Original advisory

cve-program · CVE-2026-82271

Published

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.

Read the publisher's advisory

Affected versions, risk and source history

cve-program · CVE-2026-82271

Published

r2r

Vendor product

Publisher's version information

Shown as published. These rules are not interpreted as NuGet package version ranges.

{
                    "vendor": "SciPhi-AI",
                    "product": "R2R",
                    "versions": [
                        {
                            "version": "0",
                            "lessThanOrEqual": "3.6.5",
                            "status": "affected",
                            "versionType": "semver"
                        }
                    ],
                    "defaultStatus": "unaffected",
                    "packageName": "r2r"
                }

Original source record · Cite this exact observation · Complete original publisher JSON