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CriticalVulnerabilityCVE-2026-101521updated 25 Oct 2026, 15:24 UTC

Oracle APEX can be fully taken over by unauthenticated remote attackers

Oracle APEX is a tool for building web apps on top of Oracle databases. A flaw lets someone on the internet take control of it without logging in, so they could read, change, or break the data and apps it runs.

Official, 2 sources
SeverityCriticalCVSS 9.8 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 critical flaw in the 'General' component of Oracle APEX allows unauthenticated network attackers to compromise the application over HTTPS, resulting in full takeover (CVSS 9.8).

Why it is dangerous: An attacker needs no account and no user action, so any internet-reachable APEX instance can be compromised with impacts to confidentiality, integrity, and availability. Organizations running APEX-based apps with exposed web access are at risk.

Are you affected?

You are affected if you run Oracle APEX 24.1.0-24.1.21, 24.2.0-24.2.20, or 26.1.0-26.1.4 and it is reachable over the network via HTTPS.

Oracle APEX 24.1.0-24.1.21; 24.2.0-24.2.20; 26.1.0-26.1.4

What to do

  1. Check whether your Oracle APEX version falls within the affected ranges
  2. Restrict network access to APEX instances so they are not exposed to the internet until patched
  3. Apply the official Oracle patch or upgrade to a fixed release as soon as it is available from Oracle

Timeline

  1. 20 Oct 2026, 22:18 UTC
    Publicly disclosed
  2. 20 Oct 2026, 22:18 UTC
    Reported by NVD · NVD
  3. 25 Oct 2026, 15:24 UTC
    GitHub Advisory reported on it · GitHub Advisory

Sources 2 reports, oldest first

Official vendor, government CERT or advisory database

Technical details

ID
CVE-2026-101521 · GHSA-rhq8-7qph-vw39
CVSS
9.8 / 10
EPSS
0.6% chance of exploitation within 30 days
Disclosed
20 Oct 2026, 22:18 UTC
On Zero Radar
before the radar started
Last change
25 Oct 2026, 15:24 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 APEX can be fully taken over by unauthenticated remote attackers · Zero Radar