# CVE-2026-82271: SciPhi R2R privilege escalation via missing ownership validation

Source: https://junglewise.ai/threats/cve-2026-82271-sciphi-r2r-privilege-escalation-via-missing-ownership-validation  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-08-28. Updated: 2026-09-25  
License: CC BY 4.0 with a link back

CVE-2026-82271 · Severity: medium · CVSS 6.5 · Published 2026-08-28

R2R is a production-ready AI retrieval system that manages user conversations and messages through a REST API. An authentication bypass flaw allows logged-in users to modify other users' conversations without permission—renaming them or injecting malicious messages into their chat history. This compromises data integrity and confidentiality across the multi-tenant system.

Technologies: [SciPhi R2R](https://junglewise.ai/threats/technologies/r2r). Vendors: [SciPhi](https://junglewise.ai/threats/vendors/sciphi).

## Quick answers

**Is CVE-2026-82271 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-82271 being exploited in the wild.

**How severe is CVE-2026-82271?** Medium severity, with a CVSS score of 6.5, published 28 August 2026.

**Which products and versions are affected?** SciPhi R2R through 3.6.5.

**Is there a fix for CVE-2026-82271?** No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.

**How is CVE-2026-82271 attacked?** It is attacked over the network.

**Am I affected by CVE-2026-82271?** Check whether you run SciPhi R2R at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## Technical details

The vulnerability is a missing authorization check in the conversation update and message handler endpoints. Authenticated users can supply arbitrary conversation identifiers without ownership validation, allowing them to rename conversations and append messages to other users' conversation histories. The flaw exists in the conversations_router.py API handlers (v3). No special privileges or user interaction is required beyond authentication; the attacker only needs valid API credentials. Patches should enforce ownership checks before any conversation or message modification operation.

## Affected products

- SciPhi R2R through 3.6.5

## Timeline

- 2026-08-28: disclosed

## References

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