CVE-2026-9319 IBM WebSphere Application Server
| Affected software | IBM WebSphere Application Server |
|---|---|
| Severity | 9.0 Critical CVSS 3.1 |
| Weakness | Deserialization of untrusted data (CWE-502) |
| Published | 1 Jun 2026 |
| Updated | 22 Jul 2026 |
Description
IBM WebSphere Application Server 9.0, and 8.5 is vulnerable to potential remote code execution due to deserialization of untrusted data via JAX-WS endpoints with WS-Security.
Exploitation status
No public exploit
No exploit has been reported in the sources we check.
Exploitation status
- CISA KEV not listed
- VulnCheck KEV not listed
- CISA Vulnrichment exploitation: none
- Indexed PoC none indexed
- EPSS 0.46% chance in 30 days
Waratek protection
Waratek has a rule that blocks attacks on this vulnerability.
- Protection full Deserialization, Process
- Action available security rule
- Review automated Inferred
- Record active
| Decided by | A vulnerability class already blocked by an ARMR security rule |
|---|---|
| Finding | Protected by Waratek's ARMR deserialization security rule, which blocks this class of attack at the JVM level without a rule written for this CVE specifically. The CVE's weakness is CWE-502: Deserialization of Untrusted Data. |
How to mitigate CVE-2026-9319
Apply the vendor's fix for IBM WebSphere Application Server. Until you can, Waratek RASP blocks exploitation with its deserialization and process rules. It runs inside the Java application, with no code changes.
Affected software and releases
Products and versions
1 product, 2 version entries| Source | Vendor | Product | Scheme | Affected versions |
|---|---|---|---|---|
| nvd | ibm | websphere application server | generic | ≥ 8.5.0.0 and < 8.5.5.30 · ≥ 9.0.0.0 and < 9.0.5.29 |
References
| URL | Tags |
|---|---|
| https://www.ibm.com/support/pages/node/7274738 | Vendor Advisory |
Timeline
Timeline
| Published | 2026-06-01 | By the CVE Program. |
|---|---|---|
| NVD record modified | 2026-07-22 | NVD's own last-modified date for this record. |