CVE-2021-38997: IBM API Connect

Medium severity, CVSS 5.4. EPSS: 0.4% chance of exploitation in the next 30 days.

IBM API Connect V10.0.0.0 through V10.0.5.0, V10.0.1.0 through V10.0.1.7, and V2018.4.1.0 through 2018.4.1.19 is vulnerable to HTTP header injection, caused by improper validation of input by the HOST headers. This could allow an attacker to conduct various attacks against the vulnerable system, including cross-site scripting, cache poisoning or session hijacking. IBM X-Force ID: 213212.

Affected products

• IBM API Connect: from 10.0.0.0, up to and including 10.0.5.0; from 10.0.1.0, up to and including 10.0.1.7; from 2018.4.1.0, up to and including 2018.4.1.19

Published 2022-12-12. Last modified 2026-06-17.