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CVE-2026-87902

High CVSS 8.1 Known exploited

Published 2026-09-22 · last changed 2026-09-25 · added to CISA KEV 2026-09-25

This one is being exploited in the wild.

CISA added CVE-2026-87902 to the Known Exploited Vulnerabilities catalog on 2026-09-25. Federal agencies are required to remediate it on a deadline. If you have affected machines, this is the class of finding that moves ahead of the rest of the queue.

The fix

We hold no Microsoft remediation data for CVE-2026-87902, which normally means it is not a Windows CVE. For non-Microsoft software the fix is the vendor's own updated release, and the affected versions are listed below.

What it is

An unauthenticated attacker can make `get_page_template()` page-template resolution include a chosen readable local `.php` file outside the active theme directories. If relevant pre-conditions for both the server and the active theme are met, this can lead to RCE.

Sources

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