CISA adds Chromium V8 flaw to KEV list
CISA added an actively exploited Chromium V8 type confusion vulnerability (CVE-2026-85046) to its Known Exploited Vulnerabilities catalog, requiring federal agencies to remediate per BOD 26-04.
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-2026-85046 as exploited in the wild.
CISA has added CVE-2026-85046, a type confusion vulnerability in Google Chromium's V8 JavaScript engine, to its Known Exploited Vulnerabilities (KEV) Catalog based on confirmed evidence of active exploitation. Type confusion bugs in V8 are a recurring class of vulnerability that attackers leverage for remote code execution or sandbox escape in Chromium-based browsers, making them a frequent vector for both targeted and opportunistic campaigns.
Under Binding Operational Directive (BOD) 26-04, Federal Civilian Executive Branch (FCEB) agencies are required to prioritize remediation of vulnerabilities in the KEV Catalog, particularly those on publicly exposed assets that could grant an attacker full control post-exploitation. The directive also mandates that agencies check whether systems were compromised prior to patching. While the directive is binding only on FCEB agencies, CISA recommends that all organizations adopt similar risk-based vulnerability management practices and treat KEV Catalog entries as high priority for patching.
No further technical details, exploitation actors, or malware associated with this activity were disclosed in the advisory. Organizations running Chromium-based browsers (Chrome, Edge, and derivatives) should verify they are on patched versions and monitor for indicators of compromise consistent with browser exploitation.
Mentioned in this report
Source reporting: https://www.cisa.gov/news-events/alerts/2026/09/04/cisa-adds-one-known-exploited-vulnerability-catalog
Free public brief. Slack alerts on the vendors you run come with the paid plans, and a new account gets three days of them, no card.
What this brief leaves out
This page is the free tier: the write-up, the severity, the names. In the app the same report carries live profiles of the CVEs it names. The paid plans add the security research and news reporting the free tier leaves out.
It sits in a corpus of 16,436 reports from 149 sources, 661 of them written in the last seven days, and it grows through the day.
A new account starts with three days of all of it, no card, then keeps the government and CERT reporting free. Slack alerts are a paid-plan feature: name the vendors you run and Slack hears about the reports that touch them, not the rest of the week's. Nothing is charged unless you subscribe.
Create a free account What it costs