CVE-2026-101521

CRITICAL 9.8

Published 2026-10-20 · Last modified 2026-10-22

Vulnerability in Oracle APEX (component: General). Supported versions that are affected are 24.1.0-24.1.21, 24.2.0-24.2.20 and 26.1.0-26.1.4. Easily exploitable vulnerability allows unauthenticated attacker with network access via HTTPS to compromise Oracle APEX. Successful attacks of this vulnerability can result in takeover of Oracle APEX. CVSS 3.1 Base Score 9.8 (Confidentiality, Integrity and Availability impacts). CVSS Vector: (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H).

ELEVATED IMPACT

Severe if exploited (CVSS 9.8), but no known exploitation and low modeled probability. Patch on a normal cadence.

Exploitation likelihood

0.6%chance of exploitation in 30 days · 47th percentile

○ In CISA KEV ○ Catalogued PoC

Impact if exploited

9.8CVSS 3.1 · CRITICAL

ConfidentialityHigh
IntegrityHigh
AvailabilityHigh

What an attacker needs

✓Access: Reachable over the network — no local access needed
✓Privileges: No account or privileges required
✓User interaction: No user interaction needed
✓Complexity: No special conditions — reliably repeatable

✓ lowers the bar for an attacker · ⚠ raises it

Proof of concept

No public PoC is currently catalogued.

Search for new PoCs

Search GitHub now — results may be empty or unverified.

Tracked sources are checked daily for recent CVEs, including PoCs published after the original disclosure. A later release appears after a tracked source lists it and a refresh succeeds.

Data snapshot: 2026-10-26T13:52:32.101Z

Affected

Vendors Oracle Corporation

Products Oracle Apex

Weakness (CWE)

CWE-306: Missing Authentication for Critical Function
CWE-287: Improper Authentication

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

References and research data (JSON)

All CVSS metrics

CRITICAL 9.8 v3.1 · CNA Primary
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CRITICAL 9.8 v3.1 · NVD Secondary
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

References

Advisories

https://www.oracle.com/security-alerts/cpuoct2026.html vendor-advisoryCVE record · oracle · Updated 2026-10-20T21:21:20.206Z
NVD · CVE-2026-101521 · Updated 2026-10-22T23:17:58.930
https://euvd.enisa.europa.eu/vulnerability/EUVD-2026-105934 ADVISORYEUVD · EUVD-2026-105934

Sources: NVD · CVE.org · EPSS