# CVE-2026-106386 — Google Chrome

> As of 2026-10-07, CVE-2026-106386 is a MEDIUM-severity vulnerability in Google Chrome, CVSS v3.1 6.5, EPSS 0.2% (13.7th percentile). Threadlinqs Intelligence links 1 tracked threat campaign to CVE-2026-106386, most recently “Multiple Vulnerabilities in Google Chrome prior to 155.0.8059.39 (incl. CVE-2026-102322 SiteIsolation RCE and CVE-2026-106386 WebAudio, public PoC reported)”.

**Last updated:** 2026-10-07

## What is CVE-2026-106386?

Uninitialized resource in WebAudio in Google Chrome prior to 155.0.8059.39 allowed a remote attacker to read memory inside the sandbox via a crafted HTML page. (Chromium security severity: Medium)

The record classifies CVE-2026-106386 under weakness class [CWE-908](https://intel.threadlinqs.com/cwe/CWE-908). Its CVSS v3 base vector states that the flaw is reachable remotely over the network, needs no prior authentication, needs a user to take an action first, and has high impact on confidentiality. 1 affected-product entry is recorded, across 1 vendor, listed below. The identifier was first published 4 days ago.

## Severity and exploitation probability

- **CVSS v3.1 base score:** 6.5 — MEDIUM (`CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N`)
- **EPSS (FIRST):** 0.2% probability of exploitation in the next 30 days, higher than 13.7% of all scored CVEs
- **CISA KEV:** Not listed in the CISA Known Exploited Vulnerabilities catalog
- **Threadlinqs priority:** 3.8/10 — a Threadlinqs composite of the CVSS base score, the EPSS percentile and public exploit availability
- **Published:** 2026-10-06, last modified 2026-10-07

## Is CVE-2026-106386 being exploited?

No public exploitation evidence for CVE-2026-106386 is recorded in the sources Threadlinqs tracks — CISA KEV, Exploit-DB, public proof-of-concept repositories and ProjectDiscovery Nuclei — as of 2026-10-07. That is an absence of evidence in those feeds, not a guarantee that the vulnerability is unexploited.

## Affected products and versions

- [Google](https://intel.threadlinqs.com/vendors/google): Chrome

## How to fix CVE-2026-106386

Vendor advisory: [https://chromereleases.googleblog.com/2026/10/stable-channel-update-for-desktop_086471744.html](https://chromereleases.googleblog.com/2026/10/stable-channel-update-for-desktop_086471744.html). Apply the vendor fix referenced above to every affected product listed in this record, then confirm the running version against the vendor advisory.

## Threat activity tracking CVE-2026-106386

1 tracked threat in the Threadlinqs corpus references CVE-2026-106386, either in the campaign’s CVE list or as an indicator on the campaign record.

- [Multiple Vulnerabilities in Google Chrome prior to 155.0.8059.39 (incl. CVE-2026-102322 SiteIsolation RCE and CVE-2026-106386 WebAudio, public PoC reported)](https://intel.threadlinqs.com/threat/TL-2026-3151) — CRITICAL · 2026-10-09

## Sources

Enriched from CVE.org, NVD, FIRST EPSS, GitHub Security Advisories. Last verified by Threadlinqs on 2026-10-09. This product uses the NVD API but is not endorsed or certified by the NVD.

**Other references**

- [chromereleases.googleblog.com](https://chromereleases.googleblog.com/2026/10/stable-channel-update-for-desktop_086471744.html)
- [issues.chromium.org](https://issues.chromium.org/issues/553156221)

Canonical: https://intel.threadlinqs.com/cve/CVE-2026-106386
Full detection coverage and IOCs for threats exploiting CVE-2026-106386 via the Threadlinqs MCP server (Purple tier): https://intel.threadlinqs.com/mcp