CVE-2026-11538

LOW
Published Sep 18, 2026 Modified Sep 24, 2026 CWE-117

Description

IBM WebSphere Application Server 9.0 and 8.5 is affected by a log injection vulnerability through crafted LTPA token cookies.

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CVSS v3.1 Score

3.7
LOW
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:N

EPSS — Exploit Prediction

0.0016
Probability of exploitation
0.05%
Percentile rank

EPSS estimates the probability that this vulnerability will be exploited in the wild within the next 30 days. A higher score means more likely to be exploited.

Weakness Type (CWE)

CWE-117 CWE-117

Affected Products

Vendor Product
ibm websphere_application_server
ibm websphere_application_server

References

Frequently Asked Questions

What is CVE-2026-11538? +
IBM WebSphere Application Server 9.0 and 8.5 is affected by a log injection vulnerability through crafted LTPA token cookies. It has a CVSS v3.1 base score of 3.7 (LOW).
How severe is CVE-2026-11538? +
CVE-2026-11538 has a CVSS v3.1 score of 3.7 out of 10, rated LOW. This is a low-severity vulnerability with limited impact. The EPSS score is 0.0016, placing it in the 0th percentile for exploitation probability.
What products are affected by CVE-2026-11538? +
CVE-2026-11538 affects products from ibm, specifically: websphere_application_server. Check the affected products table above for specific version ranges.
How do I check if I'm vulnerable to CVE-2026-11538? +
You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

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