CVE-2021-38997 IBM API Connect HOST header injection

What is CVE-2021-38997?

CVE-2021-38997 is a medium-severity vulnerability in Ibm Api Connect, published on 1 Dec 2022. Any signed-in user can exploit it over the network, with no action from the victim.

Official 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.

Weakness: CWE-116, CWE-644

Which versions are affected by CVE-2021-38997?

It affects 1 product.

Products include Ibm Api Connect.

How do I fix CVE-2021-38997?

No fix has been published for CVE-2021-38997 yet. Limit exposure of the affected software until one is available.

Is CVE-2021-38997 being exploited?

There is no known exploitation of CVE-2021-38997 in the wild and no public exploit code.

Other vulnerabilities in Ibm Api Connect

• CVE-2019-4202 Command injection in API Connect Critical 10.0
• CVE-2025-13915 Authentication bypass in IBM API Connect Critical 9.8
• CVE-2018-1469 Command injection in API Connect Critical 9.8
• CVE-2026-9074 IBM API Connect SQL Injection Critical 9.1
• CVE-2019-4008 Information disclosure in API Connect Critical 9.0

All Ibm Api Connect vulnerabilities

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as GHSA-56xq-39jp-p7r8.