CVE-2026-55881CWE-639

OpenReplay: Cross-tenant session replay disclosure via missing session ownership check in first-mob endpoint

High · published July 10, 2026

CVSS v4.0
7.1
EPSS
0%
Percentile
35.9
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v4.0
7.1 · HIGH
Vector
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N
EPSS
0.00427 · 35.9th percentile
Weakness
CWE-639 · Authorization Bypass Through User-Controlled Key
Published
2026-07-10T20:44Z
EPSS history
Timeline
  • 10 JUL 20:44Z
    OpenReplay: Cross-tenant session replay disclosure via missing session ownership check in first-mob endpoint
    cvelistv5