CVE-2026-118336
published 2026-10-27CVE-2026-118336: Improper input validation in Headless in Google Chrome prior to 156.0.8078.73 allowed a remote attacker to potentially execute arbitrary code inside the…
PriorityP353high8.8CVSS 3.1
AVNACLPRNUIRSUCHIHAH
EPSS
0.32%
24.6th percentile
Improper input validation in Headless 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)
Affected
3 ranges
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| chrome | < 156.0.8078.73 | 156.0.8078.73 | |
| chrome | >= 156.0.8078.73 < 156.0.8078.73 | 156.0.8078.73 | |
| chrome_desktop | — | — |
CVSS provenance
nvdv3.18.8HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
vendor_redhat8.8HIGH
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Red Hat
chromium-browser: Improper input validation in Headless
vendor_redhat·2026-10-27·CVSS 8.8
CVE-2026-118336 [HIGH] CWE-20 chromium-browser: Improper input validation in Headless
chromium-browser: Improper input validation in Headless
Improper input validation in Headless 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)
An improper input validation flaw was found in the Headless component of the Chromium browser.
Upstream bug(s):
https://issues.chromium.org/issues/572111820
Statement: Red Hat Product Security rates the severity of this flaw as determined by the Google Chrome Security Advisory.
Chrome
Stable Channel Update for Desktop: CVE-2026-118328
vendor_chrome·2026-10-27
CVE-2026-118328 [HIGH] Stable Channel Update for Desktop: CVE-2026-118328
Stable Channel Update for Desktop
CVE-2026-118328: Improper input validation in WebRTC. Reported by Mozilla on 2026-10-07 [N/A][ 571147583 ] High CVE-2026-118333: Missing authorization in Video
Reported by Xinyang Ge (Anthropic), assisted by Claude on 2026-10-07 [TBD][ 572111820 ] High CVE-2026-118336: Improper input validation in Headless
Severity: high
VulDB
Google Chrome up to 156.0.8078.47 Headless input validation
vuldb·2026-10-28
CVE-2026-118336 [CRITICAL] Google Chrome up to 156.0.8078.47 Headless input validation
A vulnerability was found in Google Chrome and classified as critical. The affected element is an unknown function of the component Headless. The manipulation results in improper input validation.
This vulnerability is known as CVE-2026-118336. It is possible to launch the attack remotely. No exploit is available.
It is suggested to upgrade the affected component.
GHSA
Improper input validation in Headless 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.
ghsa_unreviewed·2026-10-28
CVE-2026-118336 CWE-20 Improper input validation in Headless 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.
Improper input validation in Headless 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)
No detection rules found.
No public exploits indexed.
2026-10-27
Published