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CVE-2026-9311 is a critical code-injection vulnerability in IBM WebSphere Application Server traditional caused by a bypass of security controls. It affects WebSphere Application Server 9.0 releases 9.0.0.0 through 9.0.5.28 and 8.5 releases 8.5.0.0 through 8.5.5.29, across supported affected platforms and editions. The flaw is classified as CWE-94 and permits remote code execution when the security-control bypass is successfully exploited.
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What it means. What to do now. Patch path, mitigations, and the assume-compromise checklist.
What an attacker gets, and what they’ve been doing with it.
If you can’t patch tonight, do this now.
Patch, then assume compromise.
No public exploits tracked yet. Mallory keeps watching.
No public exploit code observed for this vulnerability.
Products and vendors Mallory has correlated with this vulnerability. Open in Mallory to drill down to specific CPE configurations and version ranges.
Vendor-confirmed product mapping. Mallory continuously reconciles this list against your asset inventory.
16 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
A remote code execution vulnerability in IBM WebSphere Application Server caused by bypass of security controls.
A critical IBM WebSphere security control bypass vulnerability that can be leveraged for remote code injection/execution.
A remote code execution vulnerability in IBM WebSphere Application Server 9.0 and 8.5 caused by a bypass of security controls.
A code injection vulnerability in IBM WebSphere Application Server traditional, published in the same IBM bulletin as CVE-2026-9330 and affecting the same major versions.
Query your assets running an affected version, and investigate the blast radius.
Every observed campaign linking this CVE to a named adversary.
Malware families riding this exploit, with evidence and IOCs.
YARA, Sigma, Snort, and vendor rules, auto-deployed to your SIEM.
Cross-references every affected SKU, including bundled OEM variants.
Community discussion across Reddit, Mastodon, and other social sources.