Vulnerability · Published Aug 28, 2026 · Assigned by VulnCheck

CVE-2026-82271R2R Missing Ownership Check Allows Modifying Other Users' Conversations

Medium 6.5

In plain English

A medium-severity authorization bypass via user-controlled key in R2R from SciPhi-AI. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.4% (higher than 33% of all known vulnerabilities).

Severity (CVSS 3.1)6.5Medium

Exploit odds (30 days)0.4%top 66.8% of all CVEs

Exploited in the wildNo reportsCISA SSVC: poc

Attack toolingNoneno public tooling known

Official 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.

Affected products (as reported)

Vendor	Product	Versions
SciPhi-AI	R2R	0 – through 3.6.5

Weakness: CWE-639 · Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N

References

GitHub Issue #2292 issue-tracking
https://github.com/SciPhi-AI/R2R product
Vulnerable code: conversations_router.py technical-description
VulnCheck Advisory: R2R Missing Ownership Check Allows Modifying Other Users' Conversations third-party-advisory