Medium severity · published Oct 19, 2026
CVE-2026-4405
IBM Concert Software Use of Web Browser Cache Containing Sensitive Information
4.0
CVSS
0.2%
EPSS
No
On KEV
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.
CVSS vector
CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
Attack vector
Local
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
Low
Integrity
None
Availability
None
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.2% · higher than 5% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
CO
Concert · IBM
1.0.0 through 3.0.0 · source: vendor
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-4405
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-4405
www.ibm.com
https://www.ibm.com/support/pages/node/7292374
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