CVE-2026-21962 Oracle HTTP Server and Oracle Weblogic Server Proxy Plug-in: login or permission bypass
In plain words: A door that should be locked is not: part of the system can be reached without a valid login or permission. The attacker gets in as a user or administrator without knowing a password.
Confirmed exploited by CISA on · US federal patch deadline Aug 27, 2026
What to do
- Install Oracle's security update for HTTP Server and Oracle Weblogic Server Proxy Plug-in. If no update exists, follow the vendor's workaround or stop using the product until one ships.
- Keep a list of every internet-facing server you run so nothing is forgotten.
- Patch anything in this catalog first, ahead of normal patch cycles.
- Put admin and file-transfer apps behind a VPN or single sign-on instead of the open internet.
Who is affected
Work IT. Aimed mostly at company systems — you are affected through the companies you use, not your own phone.
What's at risk: Mass data theft and ransomware: a single flaw in a file-transfer or email server has exposed thousands of organisations at once.
The details
- Official name
- Oracle HTTP Server and Oracle Weblogic Server Proxy Plug-in Improper Access Control Vulnerability
- Product
- Oracle HTTP Server and Oracle Weblogic Server Proxy Plug-in
- CISA description
- Oracle HTTP Server and Oracle Weblogic Server Proxy Plug-in contain an improper access control vulnerability that can result in unauthorized creation, deletion or modification access to critical data as well as unauthorized access to critical data or complete access to all Oracle HTTP Server and Oracle Weblogic Server Proxy Plug-in accessible data.
- Type of flaw
- Login or permission bypass (CWE-284)
- Confirmed exploited
- Aug 24, 2026
- US federal patch deadline
- Aug 27, 2026
Ask Cleus about it
Ask about a vulnerability, an update, a weird message, or the news. Plain-word answers, free, no account.
Answering about CVE-2026-21962 ·
Questions about CVE-2026-21962
Is CVE-2026-21962 being exploited?
Yes. CISA added CVE-2026-21962 to its Known Exploited Vulnerabilities catalog on Aug 24, 2026, which means there is reliable evidence of real-world attacks.
How do I fix CVE-2026-21962?
Install Oracle's security update for HTTP Server and Oracle Weblogic Server Proxy Plug-in. If no update exists, follow the vendor's workaround or stop using the product until one ships. Keep a list of every internet-facing server you run so nothing is forgotten.
Am I affected by CVE-2026-21962?
Only if you use Oracle HTTP Server and Oracle Weblogic Server Proxy Plug-in. Aimed mostly at company systems — you are affected through the companies you use, not your own phone.