CVE-2026-11538 IBM WebSphere Application Server prior to 9.0.5.29 and 8.5.5.31 are affected by multiple vulnerabilities
Attackers can inject malicious content into logs via crafted LTPA token cookies in IBM WebSphere Application Server.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-11538?
CVE-2026-11538 is a low-severity vulnerability in Ibm Websphere Application Server, published on 18 Sep 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
IBM WebSphere Application Server 9.0 and 8.5 is affected by a log injection vulnerability through crafted LTPA token cookies.
Weakness: CWE-117
Which versions are affected by CVE-2026-11538?
It affects 1 product.
Products include Ibm Websphere Application Server.
How do I fix CVE-2026-11538?
No fix has been published for CVE-2026-11538 yet. Limit exposure of the affected software until one is available.
Is CVE-2026-11538 being exploited?
There is no known exploitation of CVE-2026-11538 in the wild and no public exploit code.
Other vulnerabilities in Ibm Websphere Application Server
Sources
Also known as GHSA-wgpc-w629-m235.