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Critical· 9

CVE-2026-9319

CVE-2026-9319 is a critical remote code execution vulnerability (CVSS 9) affecting IBM WebSphere Application Server 9.0 and 8.5. It occurs when untrusted data is deserialized via JAX-WS endpoints with WS-Security, allowing attackers to execute arbitrary code. The vulnerability falls under CWE-502.

publishedJun 1, 2026
last modifiedJul 22, 2026
sourcesNVD
severity · cvss
9
critical · how bad it is
exploitation · epss
<1%
37th percentile · chance of exploitation in 30 days
(ai-assisted) A model wrote this summary from the official data, so double-check it against the source before you act on it. Read the official advisory →
auto-deletes from the system
counting…on Sep 5, 2026

No official fix yet. If none appears within 45 days of first tracking, this entry is removed automatically.

01

Who is affected

IBM WebSphere Application Server 9.0 and 8.5

02

Real-world impact

Remote code execution could allow attackers to take control of affected systems.

03

Why this severity

CVSS score of 9 indicates a critical risk with high confidence in exploitation and impact.

04

What to do about it

no official fix yet

No official fix or mitigation is documented in the sources yet. Monitor the vendor advisory and apply the patch as soon as it is released.

No fix documented in sources

05

Timeline

  1. Jun 1, 2026 · Jun 1, 2026
    Published
    Disclosed and added to the National Vulnerability Database.
  2. Jul 22, 2026 · 13d ago
    Advisory updated
    The NVD record was last revised.
06

How it’s attacked

Attack vectorNetwork (remote)
Attack complexityHigh
Privileges requiredNone
User interactionNone needed
ScopeChanged
Confidentiality impactHigh
Integrity impactHigh
Availability impactHigh
07

References & advisories

NVD advisory ↗Search advisories ↗
(ai-assisted) A model wrote this summary from the official data, so double-check it against the source before you act on it. Read the official advisory →