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CriticalVulnerabilityCVE-2026-87347updated 25 Oct 2026, 18:35 UTC

Oracle HTTP Server flaw lets low-privilege users change or read protected data

Someone with a basic login over the network could possibly read and change data that should be off-limits to them. The flaw sits in the web server software Oracle uses to serve some business applications.

Official, 2 sources
SeverityCriticalCVSS 9.6 of 10
Being exploited?UnclearNo reports either way yet
Fix available?UnclearNo fixed version published in the sources yet
How sure is this?Official, 2 sourcesBacked by an official source

What happened

A flaw in the OSSL Module of Oracle HTTP Server (part of Oracle Fusion Middleware) allows a low-privileged attacker with HTTP network access to compromise the server, with a scope change that can impact other products.

Why it is dangerous: A successful attack can give unauthorized creation, deletion, or modification of critical data, and access to all data the server can reach. Organizations running Oracle Fusion Middleware web tier components are at risk.

Are you affected?

You are affected if you run Oracle HTTP Server 12.2.1.4.0 or 14.1.2.0.0 with the OSSL Module exposed to network HTTP access.

Oracle HTTP Server 12.2.1.4.0; Oracle HTTP Server 14.1.2.0.0 (Oracle Fusion Middleware, component: OSSL Module)

What to do

  1. Check whether you run Oracle HTTP Server 12.2.1.4.0 or 14.1.2.0.0 and whether the OSSL Module is in use
  2. Apply the security update from Oracle's Critical Patch Update advisory for these versions
  3. Restrict network access to the HTTP server and limit low-privileged accounts until patched

Timeline

  1. 20 Oct 2026, 22:20 UTC
    Publicly disclosed
  2. 20 Oct 2026, 22:20 UTC
    Reported by NVD · NVD
  3. 25 Oct 2026, 18:35 UTC
    GitHub Advisory reported on it · GitHub Advisory

Sources 2 reports, oldest first

Official vendor, government CERT or advisory database

Technical details

ID
CVE-2026-87347 · GHSA-9p5w-cjch-8g2m
CVSS
9.6 / 10
EPSS
0.4% chance of exploitation within 30 days
Disclosed
20 Oct 2026, 22:20 UTC
On Zero Radar
before the radar started
Last change
25 Oct 2026, 18:35 UTC

The plain-language parts and the attack diagram were written by an AI model (anthropic/claude-haiku-5.5) from the sources above. Facts like versions, exploitation and dates come from the sources themselves. How Zero Radar works

Oracle HTTP Server flaw lets low-privilege users change or read protected data · Zero Radar