Vulnerability details
CVE-2026-82271
SciPhi-AI R2R
R2R Missing Ownership Check Allows Modifying Other Users' Conversations
CVSS 4.0
7.1High
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.
CVSS scores
| Score | Version | Source | Vector |
|---|---|---|---|
| 7.1High | 4.0 | CVEProject cvelistV5 (CNA) (VulnCheck) | 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 |
| 6.5Medium | 3.1 | CVEProject cvelistV5 (CNA) (VulnCheck) | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N |
Affected products
| Vendor | Product | Versions | Source |
|---|---|---|---|
| SciPhi-AI | R2R | v ≤ 3.6.5 | CVEProject cvelistV5 (CNA) |
References and advisories
4- https://github.com/SciPhi-AI/R2R product
- https://github.com/SciPhi-AI/R2R/blob/9c5a94d151f90876bd7eb860f300a8fd662dc481/py/core/main/api/v3/conversations_router.py technical-description
- https://www.vulncheck.com/advisories/r2r-missing-ownership-check-allows-modifying-other-users-conversations third-party-advisory
- https://github.com/SciPhi-AI/R2R/issues/2292 issue-tracking
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Details
- Published
- 2026-08-28
- Last updated
- 2026-09-24
- State
- Published
- Assigner (CNA)
- VulnCheck
Exploit prediction (EPSS)
0.38%
Probability of exploitation in 30 days
33.1%
Percentile (among all CVEs)
SSVC assessment (CISA)
- Automatable
- No
- Exploitation
- Proof of concept
- Technical impact
- Total
Weaknesses (CWE)
- CWE-639Authorization Bypass Through User-Controlled Key