CVE-2026-82271 R2R Missing Ownership Check Allows Modifying Other Users' Conversations
Authenticated attackers can modify other users' conversations by bypassing ownership checks, leading to data corruption and content injection.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-82271?
CVE-2026-82271 is a high-severity missing authorization vulnerability in SciPhi-AI R2R, published on 28 Aug 2026. Any signed-in user can exploit it over the network, with no action from the victim.
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.
Weakness: CWE-639
Which versions are affected by CVE-2026-82271?
How do I fix CVE-2026-82271?
No fix has been published for CVE-2026-82271 yet. Limit exposure of the affected software until one is available.
Upgrade, and check permissions on every request on the server, not only in the interface. More about Missing authorization.
Is CVE-2026-82271 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-82271 exists.
Sources
Also known as GHSA-w8h6-f7c2-3rhj.