{"id":"EM-20261031-SKO9","url":"https://cyber.eventmonitor.net/incident/EM-20261031-SKO9/","type":"cve","title":"WordPress WordPress Core Time-of-check Time-of-use (TOCTOU) Race Condition Vulnerability","subtitle":"CVE-2026-119977","subject":"CVE-2026-119977","status":"Confirmed","severity":"high","affected":["WordPress WordPress Core"],"headline":"78 hours from first report to confirmed exploitation.","born":"2026-10-31T06:16:34.550Z","firstSignal":"2026-10-31T05:33:07.000Z","lastSignal":"2026-11-04T05:43:11.000Z","updated":"2026-11-04T14:43:58.877Z","revision":2,"life":[{"status":"Born","at":"2026-10-31T06:16:34.550Z","why":"second independent source: C6 NVD CVE API 2.0"},{"status":"Developing","at":"2026-10-31T06:16:34.550Z","why":"signals keep joining"},{"status":"Confirmed","at":"2026-11-03T12:00:00.000Z","why":"CISA added it to Known Exploited Vulnerabilities"}],"changeLog":[{"at":"2026-10-31T05:33:07.000Z","what":"First signal: C41 Red Hat Security Data"},{"at":"2026-10-31T06:16:34.550Z","what":"Born: second source, C6 NVD CVE API 2.0. Page EM-20261031-SKO9 created."},{"at":"2026-11-03T12:00:00.000Z","what":"Source joined: C1 CISA Known Exploited Vulnerabilities"},{"at":"2026-11-03T12:00:00.000Z","what":"Source joined: C2 CISA Cybersecurity Advisories"},{"at":"2026-11-03T12:00:00.000Z","what":"Status: Confirmed (CISA added it to Known Exploited Vulnerabilities)"},{"at":"2026-11-04T05:43:11.000Z","what":"Source joined: C130 The Hacker News"}],"stages":[{"name":"Disclosed","at":"2026-10-31T06:16:34.550Z","detail":"C6 NVD published"},{"name":"Scored","at":"2026-10-31T06:16:34.550Z","detail":"CVSS 8.1 · EPSS 1.0%"},{"name":"Exploited","at":"2026-11-03T12:00:00.000Z","detail":"C1 CISA KEV, fix by 2026-11-06"},{"name":"Advisories","at":"2026-11-03T12:00:00.000Z","detail":"1 government and CERT sources"},{"name":"Vendor Response","at":"2026-10-31T05:33:07.000Z","detail":"C41 published"},{"name":"Resolved","at":null,"detail":"When fixed: KEV deadline 2026-11-06, then 14 quiet days"}],"signals":[{"at":"2026-10-31T05:33:07.000Z","source":"C41","sourceName":"Red Hat Security Data","role":"Vendor","severity":3,"title":"Red Hat: CVE-2026-119977 (important)","text":"wordpress: WordPress: Arbitrary code execution via predictable upgrade staging paths","url":"https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2026-119977.json"},{"at":"2026-10-31T06:16:34.550Z","source":"C6","sourceName":"NVD CVE API 2.0","role":"Database","severity":3,"title":"CVE-2026-119977 (CVSS 8.1)","text":"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.","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-119977"},{"at":"2026-11-03T12:00:00.000Z","source":"C1","sourceName":"CISA Known Exploited Vulnerabilities","role":"Exploited List","severity":3,"title":"CVE-2026-119977 added to KEV: WordPress WordPress Core Time-of-check Time-of-use (TOCTOU) Race Condition Vulnerability","text":"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.","url":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog"},{"at":"2026-11-03T12:00:00.000Z","source":"C2","sourceName":"CISA Cybersecurity Advisories","role":"Government","severity":3,"title":"CISA Adds One Known Exploited Vulnerability to Catalog","text":"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","url":"https://www.cisa.gov/news-events/alerts/2026/11/03/cisa-adds-one-known-exploited-vulnerability-catalog"},{"at":"2026-11-04T05:43:11.000Z","source":"C130","sourceName":"The Hacker News","role":"Research & News","severity":2,"title":"CISA Confirms Hackers Exploiting WordPress Core Flaw During Software Upgrades","text":"The U.S. Cybersecurity and Infrastructure Security Agency (CISA) has added a security flaw in WordPress Core to the Known Exploited Vulnerabilities (KEV) catalog, citing evidence of active exploitation. The high-severity vulnerability, tracked as CVE-2026-119977 (CVSS score: 8.1), is a case of Time-of-check Time-of-use (TOCTOU) race condition that could be exploited to achieve arbitrary code","url":"https://thehackernews.com/2026/11/cisa-confirms-hackers-exploiting.html"}],"crowd":[],"reference":{"nvd":{"published":"2026-10-31T06:16:34.550","score":8.1,"severity":"HIGH","desc":"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.","product":"Wordpress","seen":1793803438877},"kev":{"added":"2026-11-03","due":"2026-11-06","ransomware":"Unknown","vendor":"WordPress","product":"WordPress Core","name":"WordPress WordPress Core Time-of-check Time-of-use (TOCTOU) Race Condition Vulnerability"},"epss":{"epss":0.0102,"pct":0.63514,"at":1793803438877},"p0":false},"mergedInto":null,"publisher":"Event Monitor Cyber"}