CVE-2026-55881 OpenReplay: Cross-tenant session replay disclosure via missing session ownership check in first-mob endpoint
Authenticated users can access other tenants' session replay recordings due to missing ownership checks, exposing sensitive user data.
- 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-2026-55881?
CVE-2026-55881 is a high-severity missing authorization vulnerability in openreplay, published on 10 Jul 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
OpenReplay is a self-hosted session replay suite. From 1.22.0 before 1.27.0, getFirstMob returned 15-second presigned S3 download URLs for a session's DOM-replay recording based solely on the session path parameter, while validateProjectAccess checked only that the project belonged to the requester's tenant and did not verify that the session belonged to that project, allowing any authenticated low-privilege user to read another tenant's first 15 seconds of session-replay recording data. This issue is fixed in version 1.27.0.
Weakness: CWE-639
Which versions are affected by CVE-2026-55881?
How do I fix CVE-2026-55881?
No fix has been published for CVE-2026-55881 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-2026-55881 being exploited?
There is no known exploitation of CVE-2026-55881 in the wild and no public exploit code.
Sources
Also known as GHSA-w2x5-m7w5-479h.