CVE-2026-2441

CVE-2026-2441 is a use-after-free (CWE-416) in Google Chromium's CSS handling that a remote attacker can trigger by getting a user's browser to process a crafted HTML page, potentially corrupting the heap. Successful exploitation yields a memory-corruption primitive in the browser; CVSS scoring is not yet available, but Chromium memory-safety flaws of this class can range from crashes to potential code execution depending on how the corruption is leveraged. Anyone running Chromium or a Chromium-based browser — Google Chrome, Microsoft Edge, Opera, and numerous embedded/branded browsers — is potentially affected, making the exposed population effectively all modern browser users. CISA added the flaw to the Known Exploited Vulnerabilities catalog on 2026-02-17, confirming it is being exploited in the wild; EPSS assigns a 22% probability of exploitation within 30 days (98th percentile), no public PoC is known, and any ransomware association is unknown. This lands amid an accelerating series of actively exploited Chrome zero-days in 2026 described in recent reporting, making rapid patching urgent.

What to do: Update Chromium and every Chromium-based browser in your estate (Chrome, Edge, Opera, Brave, and embedded browsers) to the latest vendor-stable release — recent reporting places the current patched release at Chrome 153 — and verify installed versions via the browser's About/Settings page. Per CISA's KEV required action, apply mitigations per vendor instructions or follow BOD 22-01 guidance for cloud services, and discontinue use if mitigations are unavailable. Until patched, restrict high-risk users' browsing to trusted sites and monitor vendor advisories for the specific fixed build, since exact version details are not yet published in this data.