CVE-2026-87902 WordPress Core: software flaw
In plain words: A mistake in the software that attackers have found a way to abuse. Depends on the product — see the description and the vendor advisory.
Confirmed exploited by CISA on · US federal patch deadline Sep 28, 2026
What to do
- Install WordPress's security update for Core. 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
- WordPress Core Remote File Inclusion Vulnerability
- Product
- WordPress Core
- CISA description
- WordPress Core contains a remote file inclusion vulnerability which could allow an unauthenticated attacker to make page-template resolution include a chosen readable local `.php` file outside the active theme directories, leading to remote code execution.
- Type of flaw
- Software flaw (CWE-98)
- Confirmed exploited
- Sep 25, 2026
- US federal patch deadline
- Sep 28, 2026
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Answering about CVE-2026-87902 ·
Questions about CVE-2026-87902
Is CVE-2026-87902 being exploited?
Yes. CISA added CVE-2026-87902 to its Known Exploited Vulnerabilities catalog on Sep 25, 2026, which means there is reliable evidence of real-world attacks.
How do I fix CVE-2026-87902?
Install WordPress's security update for Core. 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-2026-87902?
Only if you use WordPress Core. Aimed mostly at company systems — you are affected through the companies you use, not your own phone.