CVE-2026-4405

MEDIUM
Published Oct 19, 2026 Modified Oct 19, 2026 CWE-525

Description

IBM Concert 1.0 through 3.0.0 allows web page cache to be stored locally which can be read by another user on the system.

Is your site exposed to CVE-2026-4405?

Run a free security scan — no signup, results in seconds.

CVSS v3.1 Score

4.0
MEDIUM
CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N

EPSS — Exploit Prediction

0.0016
Probability of exploitation
0.05%
Percentile rank

EPSS estimates the probability that this vulnerability will be exploited in the wild within the next 30 days. A higher score means more likely to be exploited.

Weakness Type (CWE)

CWE-525 CWE-525

References

Frequently Asked Questions

What is CVE-2026-4405? +
IBM Concert 1.0 through 3.0.0 allows web page cache to be stored locally which can be read by another user on the system. It has a CVSS v3.1 base score of 4.0 (MEDIUM).
How severe is CVE-2026-4405? +
CVE-2026-4405 has a CVSS v3.1 score of 4.0 out of 10, rated MEDIUM. This is a medium-severity vulnerability that should be remediated as part of regular maintenance. The EPSS score is 0.0016, placing it in the 0th percentile for exploitation probability.
How do I check if I'm vulnerable to CVE-2026-4405? +
You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

Related Vulnerabilities

CVE-2025-48947

The Auth0 Next.js SDK is a library for implementing user authentication in Next.js applications. In Auth0 Next.js SDK versions 4.0.1 …
CVE-2026-118550

Use of Web Browser Cache Containing Sensitive Information vulnerability in Drupal AI (Artificial Intelligence) allows Exploiting Incorrectly Configured Access Control …
CVE-2026-114546

Use of Web Browser Cache Containing Sensitive Information vulnerability in Drupal Media Alias Display allows Exploiting Incorrectly Configured Access Control …
CVE-2026-114542

Use of Web Browser Cache Containing Sensitive Information vulnerability in Drupal Simple OAuth (OAuth2) & OpenID Connect allows Exploiting Incorrectly …
CVE-2026-114548

Use of Web Browser Cache Containing Sensitive Information vulnerability in Drupal ImageAPI Optimize WebP allows Exploiting Incorrectly Configured Access Control …
CVE-2026-118571

Use of Web Browser Cache Containing Sensitive Information vulnerability in Drupal Media Alias Display allows Exploiting Incorrectly Configured Access Control …

Don't wait for an exploit

Scan your website for vulnerabilities like CVE-2026-4405 — free, no signup required.