CVE-2026-11594
HIGH 8.5IBM WebSphere Application Server 9.0, and 8.5 is affected by a cross-site scripting vulnerability in the administrative console.
ELEVATED IMPACT
Severe if exploited (CVSS 8.5), but no known exploitation and low modeled probability. Patch on a normal cadence.
Exploitation likelihood
0.3%chance of exploitation in 30 days · 26th percentile
○ In CISA KEV
○ Public exploit / PoC
Impact if exploited
8.5CVSS 3.1 · HIGH
- ConfidentialityHigh
- IntegrityHigh
- AvailabilityNone
What an attacker needs
- ⚠Access: Must sit on the same / adjacent network
- ✓Privileges: No account or privileges required
- ⚠User interaction: A user must take an action (click / open a file)
- ✓Complexity: No special conditions — reliably repeatable
✓ lowers the bar for an attacker · ⚠ raises it
Proof of concept & exploit code
- github-search Search GitHub for public PoC repos
Test against your own equipment
curl -s https://vulnpedia.com/cve/CVE-2026-11594/poc.jsonMachine-readable PoC index for this CVE (for automation).Listed for defensive triage, patch verification, and authorized testing on systems you own. Machine-readable: /cve/CVE-2026-11594/poc.json
Weakness (CWE)
- CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
CVSS vector
CVSS:3.1/AV:A/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:N
Known Affected Software Configurations
| Vendor | Product | Version range |
|---|---|---|
| Ibm | Websphere Application Server | ≥ 8.5.0.0 and < 8.5.5.30 |
| Ibm | Websphere Application Server | ≥ 9.0.0.0 and < 9.0.5.29 |
All CVSS metrics
- HIGH 8.5 v3.1 · CNA Primary
CVSS:3.1/AV:A/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:N - HIGH 8.5 v3.1 · NVD Secondary
CVSS:3.1/AV:A/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:N - MEDIUM 6.1 v3.1 · NVD Primary
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N