What is CVE-2026-48901?

CVE-2026-48901 is a high-severity vulnerability in Joomla Joomla\!, classified under Use of Cache Containing Sensitive Information. CVSS score: 7.5/10. Published 2026-05-26.

How severe is CVE-2026-48901?

High severity. CVSS v3 base score is 7.5 out of 10.

Vulnerability in Joomla Joomla\!

CVE-2026-48901

The InputFilter::getInstance() method omitted a security sensitive parameter from the instance cache key.

Published 2026-05-26 · last modified 2026-07-24.

CVSS v3 metric

CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N.

EPSS exploit prediction

EPSS: 0.004 (34.4th percentile), scored 2026-10-19.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 34th percentile — 34.4% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.002 · newest: 0.004 · change: +0.002

Affected products

Joomla Joomla\!
Joomla! Project Cms — versions 4.0.0-5.4.5, 6.0.0-6.1.0

Weakness classification (CWE)

CWE-524 — Use of Cache Containing Sensitive Information

References

developer.joomla.org/security-centre/1049-20260517-core-incorrect-cache-key-con… (vendor-advisory, Vendor Advisory)

Frequently asked questions

What is CVE-2026-48901?: CVE-2026-48901 is a high-severity vulnerability in Joomla Joomla\!, classified under Use of Cache Containing Sensitive Information. CVSS score: 7.5/10. Published 2026-05-26.
How severe is CVE-2026-48901?: High severity. CVSS v3 base score is 7.5 out of 10.