What is CVE-2026-55879?

CVE-2026-55879 is a critical-severity vulnerability in Openreplay, classified under Cross-site Scripting. CVSS score: 9.3/10. Published 2026-07-10.

How severe is CVE-2026-55879?

Critical severity. CVSS v3 base score is 9.3 out of 10.

XSS in Openreplay

CVE-2026-55879

OpenReplay is a self-hosted session replay suite. From 1.24.0 before 1.25.0, the OpenReplay tracking SDK accepts custom event names and captured page URLs from any visitor using a public project key, stores them in ClickHouse without outpu…

Vulnerability class: XSS (Cross-Site Scripting)

CVSS v3 metric

CVSS v3 base score 9.3 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:N.

Affected products

Openreplay — versions >= 1.24.0, < 1.25.0

Weakness classification (CWE)

CWE-79 — Cross-site Scripting

References

security-advisories@github.com (x_refsource_MISC)
security-advisories@github.com (x_refsource_MISC)
security-advisories@github.com (x_refsource_CONFIRM)

Frequently asked questions

What is CVE-2026-55879?: CVE-2026-55879 is a critical-severity vulnerability in Openreplay, classified under Cross-site Scripting. CVSS score: 9.3/10. Published 2026-07-10.
How severe is CVE-2026-55879?: Critical severity. CVSS v3 base score is 9.3 out of 10.