Vulnerability · Published Oct 19, 2026 · Assigned by ibm

CVE-2026-4405IBM Concert Software Use of Web Browser Cache Containing Sensitive Information

Medium 4.0

In plain English

A medium-severity security flaw in Concert from IBM. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.1% (higher than 4% of all known vulnerabilities).

Severity (CVSS 3.1)4.0Medium

Exploit odds (30 days)0.1%top 96.3% of all CVEs

Exploited in the wildNo reportsCISA SSVC: none

Attack toolingNoneno public tooling known

Official 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.

Affected products (as reported)

Vendor	Product	Versions
IBM	Concert	1.0.0 – through 3.0.0

Weakness: CWE-525 · Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N

References

https://www.ibm.com/support/pages/node/7292374 vendor-advisory, patch