CVE-2026-119977 WordPress 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 Nov 6, 2026
What to do
- Install WordPress's security update for WordPress 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 WordPress Core Time-of-check Time-of-use (TOCTOU) Race Condition Vulnerability
- Product
- WordPress WordPress Core
- CISA description
- WordPress WordPress Core contains a time-of-check time-of-use (TOCTOU) race condition vulnerability that could allow unauthenticated attackers to execute code on the server during the upgrade window. This is due to predictable, web-accessible staging paths used during full-package core upgrades.
- Type of flaw
- Software flaw (CWE-367)
- Confirmed exploited
- Nov 3, 2026
- US federal patch deadline
- Nov 6, 2026
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Answering about CVE-2026-119977 ·
Questions about CVE-2026-119977
Is CVE-2026-119977 being exploited?
Yes. CISA added CVE-2026-119977 to its Known Exploited Vulnerabilities catalog on Nov 3, 2026, which means there is reliable evidence of real-world attacks.
How do I fix CVE-2026-119977?
Install WordPress's security update for WordPress 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-2026-119977?
Only if you use WordPress WordPress Core. Aimed mostly at company systems — you are affected through the companies you use, not your own phone.