CVE-2026-119977
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.
WordPress Core is vulnerable to Remote Code Execution in versions 4.7 through 7.1.3. This is due to predictable, web-accessible staging paths used during full-package core upgrades. This makes it possible for unauthenticated attackers to execute code on the server during the upgrade window.
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H- core.trac.wordpress.org/browser/tags/7.1.3/src/wp-admin/includes/class-core-upgrader.phpProduct
- core.trac.wordpress.org/browser/tags/7.1.3/src/wp-admin/includes/class-wp-upgrader.phpProduct
- core.trac.wordpress.org/browser/tags/7.1.3/src/wp-admin/includes/update-core.phpProduct
- core.trac.wordpress.org/browser/tags/7.1.3/src/wp-admin/setup-config.phpProduct
- core.trac.wordpress.org/browser/tags/7.1.4/src/wp-admin/includes/class-wp-upgrader.phpPatch
- core.trac.wordpress.org/browser/tags/7.1.4/src/wp-admin/includes/update-core.phpPatch
- wordpress.org/news/2026/10/wordpress-7-1-4/Release Notes
- wordfence.com/threat-intel/vulnerabilities/id/4b4da0cf-d9f4-47c4-a0e8-6c4dc5a6f250?source=cveThird Party Advisory
- cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-119977US Government Resource
- wordfence.com/threat-intel/vulnerabilities/wordpress-core/wordpress-core-470-713-unauthenticated-upgrade-window-staged-installer-remote-code-executionThird Party Advisory
- CISA Adds One Known Exploited Vulnerability to Catalog
CISA has added one new vulnerability to its Known Exploited Vulnerabilities (KEV) Catalog , based on evidence of active exploitation. CVE-2026-119977 WordPress Core Time-of-check Time-of-use (TOCTOU) Race Condition Vulnerability This type of vulnerability is a frequent attack vector for malicious cyber actors and poses significant risks to the federal enterprise. Binding Operational Directive (BOD) 26-04: Prior
CISA Alerts · 2d ago
Actively exploited. Patch immediately.
- Exploitation
- Confirmed in the wild (CISA KEV)
- Federal remediation deadline
- Due today
- CVSS
- 8.1 HIGH
- EPSS (30-day exploit probability)
- 1.2% · top 33% of all CVEs
- Weakness
- CWE-367
- Attack vector
- Network, remotely reachable
- Preconditions
- No privileges and no user interaction
- 1.Apply mitigations in accordance with vendor instructions, ensuring compliance with CISA’s BOD 26-04 Prioritizing Security Updates Based on Risk (see URL in Notes) guidance and CISA’s “Forensics Triage Requirements” (see URL in Notes). Follow applicable BOD 26-04 guidance for cloud services or discontinue use of the product if mitigations are unavailable. Stakeholders are responsible for evaluating each asset's internet exposure and ensuring adherence to BOD 26-04 patching guidelines.
- 2.Treat as emergency change: patch or isolate internet-facing instances first.
- 3.Review exposure: confirm which instances are reachable from the internet and restrict access until patched.
- 4.Hunt for compromise: review logs for the disclosure window, not just from the patch date.
Assessment is derived automatically from the live signals above; verify against your own asset inventory.