Vulnerability · Published Jul 10, 2026 · Assigned by GitHub_M

CVE-2026-55881OpenReplay: Cross-tenant session replay disclosure via missing session ownership check in first-mob endpoint

High 7.1

In plain English

A high-severity authorization bypass via user-controlled key in openreplay from openreplay. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.4% (higher than 37% of all known vulnerabilities).

Severity (CVSS 4.0)7.1High

Exploit odds (30 days)0.4%top 62.8% of all CVEs

Exploited in the wildNo reportsCISA SSVC: none

Attack toolingNoneno public tooling known

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.

Affected products (as reported)

Vendor	Product	Versions
openreplay	openreplay	>= 1.22.0, < 1.27.0

Weakness: CWE-639 · 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

References

https://github.com/openreplay/openreplay/security/advisories/GHSA-w2x5-m7w5-479h x_refsource_CONFIRM
https://github.com/openreplay/openreplay/pull/4692 x_refsource_MISC
https://github.com/openreplay/openreplay/commit/ddd09117f644a309c7b040cda0a11ff9433e9e49 x_refsource_MISC
https://github.com/openreplay/openreplay/releases/tag/v1.27.0 x_refsource_MISC