What is CVE-2026-43984?

CVE-2026-43984 is a high-severity vulnerability in Tautulli, classified under Cross-site Scripting. CVSS score: 8.9/10. Published 2026-06-04.

How severe is CVE-2026-43984?

High severity. CVSS v3 base score is 8.9 out of 10.

XSS in Tautulli

CVE-2026-43984

Tautulli is a Python based monitoring and tracking tool for Plex Media Server. Versions prior to 2.17.1 expose `log_js_errors` to any authenticated user, including guest users when guest access is enabled. The endpoint writes attacker-cont…

Vulnerability class: XSS (Cross-Site Scripting)

CVSS v3 metric

CVSS v3 base score 8.9 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:L.

Affected products

Tautulli — versions < 2.17.1

Weakness classification (CWE)

CWE-79 — Cross-site Scripting

References

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

Frequently asked questions

What is CVE-2026-43984?: CVE-2026-43984 is a high-severity vulnerability in Tautulli, classified under Cross-site Scripting. CVSS score: 8.9/10. Published 2026-06-04.
How severe is CVE-2026-43984?: High severity. CVSS v3 base score is 8.9 out of 10.