CVE-2026-5858: exploitation status and patch state

CVE-2026-5858 · EPSS 1% · patch available

Heap buffer overflow in WebML in Google Chrome prior to 147.0.7727.55 allowed a remote attacker to execute arbitrary code via a crafted HTML page. (Chromium security severity: Critical)

Is CVE-2026-5858 exploited?

• Not in the CISA KEV catalog.
• EPSS puts exploitation in the next 30 days at 1%.
• Public exploit code: none found in monitored sources.

Which products and versions are affected?

No affected package list recorded here yet.

Is there a patch?

• Release Notes

What PlainSec published about CVE-2026-5858

• Critical Chrome WebML Bugs Signal New Sandbox Escape Risk (2026-04-11)

Primary sources

• NVD record

What this record does not say

• No CVSS score from NVD.
• No affected package data.

KEV and EPSS are re-checked daily. Record last updated 2026-08-11.