{"id":"CVE-2026-119977","url":"https://www.cyber-defence.io/tools/cve/CVE-2026-119977","generatedAt":"2026-11-04T11:42:47.413Z","title":"WordPress WordPress Core Time-of-check Time-of-use (TOCTOU) Race Condition Vulnerability","description":"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.","published":"2026-10-31T06:16:35.000Z","lastModified":"2026-11-04T05:18:29.000Z","status":"Undergoing Analysis","sourceIdentifier":"security@wordfence.com","cvss":{"version":"3.1","score":8.1,"severity":"HIGH","vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H"},"cwe":["CWE-367"],"affected":[],"epss":{"score":0.006,"percentile":0.48751,"date":"2026-11-03","history":[{"date":"2026-10-31","score":0.006,"percentile":0.48715}]},"kev":{"listed":true,"dateAdded":"2026-11-03","dueDate":"2026-11-06","knownRansomwareCampaignUse":"Unknown","notes":"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.\nhttps://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 ; BOD 26-04: https://www.cisa.gov/news-events/directives/bod-26-04-prioritizing-security-updates-based-risk ; Forensics Triage Requirements: 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"},"exploits":{"count":0,"verified":false,"firstPublished":null,"source":"Exploit-DB (https://gitlab.com/exploit-database/exploitdb)","entries":[]},"verdict":{"level":"urgent","text":"Known to be exploited in the wild (CISA KEV, CISA remediation deadline 6 November 2026). Treat as an emergency change: patch or isolate now, then hunt for prior compromise."},"changes":[{"kind":"kev","label":"Added to KEV","at":"2026-11-03T00:00:00.000Z","detail":{"name":"WordPress WordPress Core Time-of-check Time-of-use (TOCTOU) Race Condition Vulnerability","vendor":"WordPress","dueDate":"2026-11-06","product":"WordPress Core","ransomware":"Unknown"},"summary":"Added to CISA KEV — known to be exploited; federal remediation due 2026-11-06."},{"kind":"new","label":"New CVE","at":"2026-10-31T06:16:35.000Z","detail":{"score":"8.1","severity":"HIGH","publishedAt":"2026-10-31T06:16:34.550Z"},"summary":"New CVE, high severity (CVSS 8.1)."}],"references":[{"url":"https://core.trac.wordpress.org/browser/tags/7.1.3/src/wp-admin/includes/class-core-upgrader.php#L162","source":"security@wordfence.com"},{"url":"https://core.trac.wordpress.org/browser/tags/7.1.3/src/wp-admin/includes/class-wp-upgrader.php#L378","source":"security@wordfence.com"},{"url":"https://core.trac.wordpress.org/browser/tags/7.1.3/src/wp-admin/includes/update-core.php#L1549","source":"security@wordfence.com"},{"url":"https://core.trac.wordpress.org/browser/tags/7.1.3/src/wp-admin/setup-config.php#L282","source":"security@wordfence.com"},{"url":"https://core.trac.wordpress.org/browser/tags/7.1.4/src/wp-admin/includes/class-wp-upgrader.php#L346","source":"security@wordfence.com"},{"url":"https://core.trac.wordpress.org/browser/tags/7.1.4/src/wp-admin/includes/update-core.php#L1545","source":"security@wordfence.com"},{"url":"https://wordpress.org/news/2026/10/wordpress-7-1-4/","source":"security@wordfence.com"},{"url":"https://www.wordfence.com/threat-intel/vulnerabilities/id/4b4da0cf-d9f4-47c4-a0e8-6c4dc5a6f250?source=cve","source":"security@wordfence.com"},{"url":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-119977","source":"134c704f-9b21-4f2e-91b3-4a467353bcc0"},{"url":"https://www.wordfence.com/threat-intel/vulnerabilities/wordpress-core/wordpress-core-470-713-unauthenticated-upgrade-window-staged-installer-remote-code-execution","source":"134c704f-9b21-4f2e-91b3-4a467353bcc0"}],"sources":{"nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-119977","epss":"https://www.first.org/epss/","kev":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog","exploitdb":"https://www.exploit-db.com/"},"licence":"CC BY 4.0 — link back to the CVE Explorer if you publish the results; upstream data remains subject to its own terms."}