CVE-2026-119977: in the CISA KEV catalogue
WordPress WordPress Core Time-of-check Time-of-use (TOCTOU) Race Condition Vulnerability. CISA added CVE-2026-119977 to the Known Exploited Vulnerabilities catalogue on 2026-11-03 with a default due date of 2026-11-06. Known ransomware campaign use: Unknown. Forensic triage flag: Yes.
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. (CISA description)
- Vendor / product
- WordPress WordPress Core
- CWE
- CWE-367
- CISA required action
- 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.
- EPSS
- 0.60%, percentile 48 (scored 2026-11-03)
EPSS puts about 6.0 in 1,000 odds (0.60%) on exploitation activity being observed in the next 30 days. Its score is higher than or equal to that of 48% of scored CVEs. This is a model estimate about exploitation anywhere, not about your environment.
Vendor and reference links (from CISA)
- https://wordpress.org/news/2026/10/wordpress-7-1-4
- https://www.wordfence.com/threat-intel/vulnerabilities/wordpress-core/wordpress-core-470-713-unauthenticated-upgrade-window-staged-installer-remote-code-execution
- https://www.cisa.gov/news-events/directives/bod-26-04-prioritizing-security-updates-based-risk
- https://www.cisa.gov/news-events/directives/bod-26-04-implementation-guidance-prioritizing-security-updates-based-risk
- https://nvd.nist.gov/vuln/detail/CVE-2026-119977
Your own deadline under CISA BOD 26-04 depends on exposure, automatability and technical impact: work it out with the BOD 26-04 calculator.
Frequently asked questions
Is CVE-2026-119977 in the CISA KEV catalogue?
Yes. CISA added CVE-2026-119977 (WordPress WordPress Core Time-of-check Time-of-use (TOCTOU) Race Condition Vulnerability) to the Known Exploited Vulnerabilities catalogue on 2026-11-03. CISA's default due date for it is 2026-11-06.
Is CVE-2026-119977 used in ransomware attacks?
CISA marks known ransomware campaign use as Unknown for CVE-2026-119977. That means CISA lacks confirmation, not that ransomware groups do not use it.
What should I do about CVE-2026-119977?
CISA's required action: 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.
Sources
- CISA, Known Exploited Vulnerabilities Catalog (accessed 2026-11-03)
- FIRST, Exploit Prediction Scoring System (EPSS) (EPSS by FIRST; scores generated by Empirical Security)
- NVD record for CVE-2026-119977