Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata – not a confirmed exploit chain
-
AccessLure victim to malicious site
-
ExploitServe crafted HTML with malformed media
-
ExecutionTrigger improper input validation in Media component
-
ImpactExecute arbitrary code within renderer sandbox
Vulnerability Assessment
| Weakness |
CWE
OWASP Top 10:2025
A05:2025 - Injection
ASVS 5.0
V2 - Validation and Business Logic Input validation, allowlisting
|
| Exploitation Conditions | Exploitation requires the victim to load attacker-controlled web content in a vulnerable Chrome build (pre-156.0.8078.47) that exercises the Media component's media parsing/playback path - the crafted HTML page is the delivery mechanism and user interaction (UI:R) is mandatory, so there is no fully passive or server-side trigger. A key LIMITING factor is that, per the description, resulting code execution is confined to the renderer sandbox: converting this into host-level compromise requires chaining a separate sandbox-escape vulnerability. Additional limiters: only vulnerable desktop Chrome (and likely Chromium-derived browsers) before the fixed version are affected, and no authentication to the attacker's site is implied beyond the victim visiting it. |
| Impact | Signals are moderately aligned toward a real but not top-tier priority. The CVSS 3.1 base score of 8.8 (AV:N/AC:L/PR:N/UI:R/S:U) reflects Chrome's standard scoring for a remotely-reachable memory-safety issue requiring only that a user open a page, but it OVERSTATES real-world impact here: the description explicitly states code execution occurs 'inside the sandbox', meaning a full compromise still requires a separate sandbox-escape chain - yet the vector carries C:H/I:H/A:H and S:U, which does not credit that containment. This is why Google itself rates the Chromium security severity only 'Medium' despite the 8.8 NVD number - a notable CVSS-vs-vendor divergence worth flagging. Exploitation status is 'no public exploit identified at time of analysis': the input provides no KEV listing, no POC flag, and no EPSS score, so there is no evidence of active or probable near-term exploitation. Net: patch in the normal Chrome update cycle rather than emergency out-of-band; the inflated 8.8 is driven by the ubiquity/network-vector scoring convention, not by confirmed weaponization, and the sandbox limitation plus required user interaction meaningfully reduce practical risk. |
| Exploit ScenarioDerived | An attacker hosts a crafted HTML page containing malformed media content and lures a victim running a pre-156.0.8078.47 Chrome build to visit it (phishing link or malvertising). When the page's media is parsed, improper input validation lets the attacker execute arbitrary code within the renderer sandbox; no public exploit code was identified in the provided data, and a further sandbox escape would be needed for host compromise. |
Get an e-mail when this CVE is exploited, patched or re-scored. Free account.
Alert meAnalysisAIv1 – Oct 21, 2026
Remote code execution inside Chrome's renderer sandbox is possible in Google Chrome versions prior to 156.0.8078.47 through crafted HTML that exercises the Media component. The CVSS 3.1 vector is 8.8 (AV:N/AC:L/PR:N/UI:R), so exploitation is remote and unauthenticated but requires the victim to load attacker-controlled content; impact is confined to the sandbox and host compromise would require a separate sandbox escape. Google has released the fixed 156.0.8078.47 build, and no public exploit identified at time of analysis; Chromium rates the issue Medium despite the High CVSS score.
RemediationAI
Update Google Chrome to 156.0.8078.47 or later; vendor-released patch: 156.0.8078.47, per the Stable Channel advisory. After updating, confirm the version via chrome://version and fully restart the browser so the new binary is in use. For managed fleets, force the fixed build through Chrome Enterprise update policies and verify compliance; where immediate patching is not possible, confine browsing of untrusted web content to an updated browser or a disposable/isolated VM because the flaw is exercised through crafted HTML and cannot be reliably disabled by a simple setting. Keep Chrome's renderer sandbox enabled; this limits the impact of successful exploitation but does not remove the flaw. Advisory: https://chromereleases.googleblog.com/2026/10/stable-channel-update-for-desktop_02018666648.html
Affected VersionsENISA
Affected Packages
Source: OSV (Open Source Vulnerabilities)
Affects your stack
Affects 1 package in euvd
Checking this CVE against your own stacks and servers is part of the Basic plan and up.
Technical ContextAI · show details
Improper input validation (CWE-20) in Chrome's Media handling means attacker-supplied HTML can reach a code path where untrusted media data is not adequately validated, potentially allowing arbitrary code execution in the renderer sandbox. The affected component is Chrome's in-browser media stack, which parses, demuxes, and decodes media for playback; this is separate from the OS sandbox, so the CVSS impact reflects code execution within the compromised renderer rather than by itself crossing to the host. The vector AV:N/AC:L/PR:N/UI:R matches a web-delivered attack with mandatory user interaction; EUVD and the Chrome Stable Channel advisory identify 156.0.8078.47 as the fix.
Know when the next one hits your stack
- Watch products and get an email when something new is published
- Check this CVE against your own stack and servers
- Exploit and PoC references, threat intelligence from 22 sources
No credit card · 7-day full trial
Severity by source
AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Remote crafted page needs a victim visit (AV:N/UI:R, PR:N), low complexity; impacts scored high within the renderer per Chrome convention, scope unchanged because code stays inside the sandbox.
Primary rating from Vendor (google).
CVSS VectorVendor: google
Lifecycle Timeline
3DescriptionCVE.org
Improper input validation in Media in Google Chrome prior to 156.0.8078.47 allowed a remote attacker to potentially execute arbitrary code inside the sandbox via a crafted HTML page. (Chromium security severity: Medium)
Executive ViewAI
Google Chrome versions prior to 156.0.8078.47 contain a high-severity, unauthenticated remote code execution issue in the Media component that is triggered when a user loads crafted HTML, with impact initially confined to Chrome's renderer sandbox. Leadership should care because Chrome is widely deployed across the workforce, but immediate business risk is tempered by the absence of public exploit code at time of analysis and the availability of a fixed vendor build; unpatched endpoints could still become an entry point if combined with a separate sandbox escape.
Apply vendor patch.
Threat Intelligence Overview
How this decision was reached
The engine reads each signal below and applies a fixed list of rules from top to bottom. The first rule that matches sets the recommended action – like a statement, every line is shown.
What every action level means
SSVC AssessmentENISA
Priority Score
Attack Technique
Remote Code Execution represents the critical moment when an attacker successfully runs arbitrary code on a target system without physical access.
EUVD-2026-105648
GHSA-gq3x-77gx-q333
NVD
CVE.org
EPSS
Exploit-DB