Vulnerability · Published Oct 13, 2026 · Assigned by ibm
CVE-2026-105442IBM WebSphere Application Server and WebSphere Application Server Liberty are affected by a deserialization of untrusted data
High 7.5
In plain English
A high-severity unsafe deserialization in WebSphere Application Server from IBM. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.4% (higher than 34% of all known vulnerabilities).
Severity (CVSS 3.1)7.5High
Exploit odds (30 days)0.4%top 66.1% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known
Official description
IBM WebSphere Application Server 8.5, and 9.0 and IBM WebSphere Application Server - Liberty 17.0.0.3 through 26.0.0.10 Liberty could allow a remote attacker to cause a denial of service caused by an insecure deserialization in the messaging service.
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| IBM | WebSphere Application Server | 8.59.0 |
| IBM | WebSphere Application Server - Liberty | 17.0.0.3 – through 26.0.0.10 |
Weakness: CWE-502 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
References
- https://www.ibm.com/support/pages/node/7292221 vendor-advisory, patch