CISA Flags WordPress Core Race-Condition Flaw
CISA added an actively exploited WordPress Core TOCTOU race-condition vulnerability (CVE-2026-119977) to its Known Exploited Vulnerabilities catalog.
Sourcecisa.gov — open the original
What to check
- Applies to
- The 1 CVE named below. Whether you run an affected version is not assessed: check the versions the source lists.
- Exploitation
- CISA lists CVE-2026-119977 as exploited in the wild.
CISA has added CVE-2026-119977, a Time-of-check Time-of-use (TOCTOU) race condition vulnerability in WordPress Core, to its Known Exploited Vulnerabilities (KEV) Catalog based on confirmed evidence of active exploitation. Race condition flaws of this type allow attackers to exploit timing gaps between a security check and the actual use of a resource, potentially leading to unauthorized actions or privilege escalation depending on the affected code path.
Under Binding Operational Directive (BOD) 26-04, Federal Civilian Executive Branch (FCEB) agencies are required to remediate this vulnerability within mandated timeframes, particularly where it exists on publicly exposed assets that could grant an attacker full control post-exploitation. The directive also requires agencies to check for prior compromise before applying patches. While BOD 26-04 is binding only on FCEB entities, CISA recommends all organizations running WordPress prioritize patching this vulnerability given its confirmed in-the-wild exploitation.
No further technical details, affected version ranges, or threat actor attribution were provided in this notice. Defenders operating WordPress sites should consult the official WordPress Core security advisory for patch availability and apply updates promptly, and should review web server logs for anomalous request patterns indicative of race-condition exploitation attempts.
Mentioned in this report
Source reporting: https://www.cisa.gov/news-events/alerts/2026/11/03/cisa-adds-one-known-exploited-vulnerability-catalog
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