Google Chrome: Memory corruption in WebAudio allows sandbox code execution
Summary
Google Chrome before 156.0.8078.73 contains a memory corruption flaw in the WebAudio component. A remote attacker can potentially execute arbitrary code inside the browser sandbox by luring a user to a crafted HTML page. The attack requires that the victim opens the malicious page; no login is needed.
Affected
- Google Chrome prior to 156.0.8078.73 (desktop)
- CWE-119: Improper restriction of operations within the bounds of a memory buffer
Fixed in
- Google Chrome 156.0.8078.73 or later (Windows and Mac: 156.0.8078.73/.74 or later)
Workaround
Unknown. No vendor-published workaround is available; updating is the remedy.
Exploitation
- No evidence of exploitation in the wild; not listed in CISA KEV (as of the research notes).
- No public proof of concept found.
- EPSS: 0.36 % (percentile 30).
Our recommendation
- Confirm that all Chrome installations run version 156.0.8078.73 or later (check chrome://settings/help or via MDM).
- Ensure automatic updates work and check for offline or pinned endpoints.
- Install the whole Chrome Stable update of 27 October 2026, which contains further security fixes.
- Re-check the exploitation status in CISA KEV and with Google.
Public exploits
PoC-in-GitHub, Metasploit and Exploit-DB list nothing for this CVE.
Research sources
- Chrome Releases: Stable Channel Update for Desktop chromereleases.googleblog.com
- Chromium issue tracker entry issues.chromium.org
- CVE-2026-118358 at OffSeq Radar radar.offseq.com
- CVE-2026-118358 at VulDB vuldb.com
- Tenable plugin 372646 www.tenable.com
- CVE-2026-118358 at TheHackerWire www.thehackerwire.com
Researched and written up in English and German by an AI (Claude by Anthropic) based on NVD, CISA, EPSS and the sources listed. The vendor information is authoritative. Researched on 31 Oct 2026, 09:41.
Original description (NVD)
Memory corruption in WebAudio in Google Chrome prior to 156.0.8078.73 allowed a remote attacker to potentially execute arbitrary code inside the sandbox via a crafted HTML page. (Chromium security severity: High)
Sources
The tracker combines official, freely usable data sources – updated continuously:
- NVD (NIST) – CVEs, rating (CVSS), affected products
- CISA KEV – vulnerabilities confirmed by CISA as actively exploited
- CISA Vulnrichment – CISA assessment (SSVC) in the official CVE record
- FIRST EPSS – probability of exploitation
- Microsoft MSRC – Patch Tuesday: vulnerabilities, severity, updates
- PoC-in-GitHub – public proof-of-concept repositories
- Metasploit (Rapid7) – modules of the Metasploit Framework
- Exploit-DB (OffSec) – archive of public exploits (links only)
- Patch days: official vendor pages (linked per vendor) (Vendor patch days)
This product uses data from the NVD API but is not endorsed or certified by the NVD. EPSS data © FIRST.org.
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