CVE-2021-38997: IBM API Connect HOST header injection

Severity: medium (CVSS 5.4 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.4% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2022-12-12 · updated 2026-06-17
Weakness: CWE-644

Description

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 through 10.0.5.0; from 10.0.1.0 through 10.0.1.7; from 2018.4.1.0 through 2018.4.1.19

References

https://exchange.xforce.ibmcloud.com/vulnerabilities/213212
https://www.ibm.com/support/pages/node/6842621
https://exchange.xforce.ibmcloud.com/vulnerabilities/213212
https://www.ibm.com/support/pages/node/6842621

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