Medium severity · published Oct 19, 2026
CVE-2026-15661
IBM Concert Software Improper Output Neutralization for Logs
5.3
CVSS
0.2%
EPSS
No
On KEV
Description
IBM Concert 1.0 through 3.0.0 could allow an unauthorized user to inject data into log messages due to improper neutralization of special elements when written to log files.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
None
Integrity
Low
Availability
None
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.2% · higher than 15% 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-2026-15661
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-15661
www.ibm.com
https://www.ibm.com/support/pages/node/7292374
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