Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata – not a confirmed exploit chain
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AccessLure victim to crafted HTML page
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ExploitDeliver malicious API payload in renderer
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ExecutionTrigger memory corruption (CWE-119)
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ImpactExecute arbitrary code within sandbox
Vulnerability Assessment
| Weakness |
CWE
ASVS 5.0
V15 - Secure Coding and Architecture Bounds checking, buffer size validation
MITRE ATT&CK
2 techniques across 2 tactics: Execution, Privilege Escalation The technique list with ATT&CK links and the kill-chain view is part of the Basic plan and up. |
| Exploitation Conditions | Exploitation requires the victim to load attacker-controlled HTML content in a vulnerable Google Chrome build earlier than 156.0.8078.47 (UI:R - the crafted page must be visited), triggering the memory-corruption flaw in the browser's API handling. Limiting factors: user interaction is mandatory (no drive-by without the victim navigating to or rendering attacker content), and the resulting code execution is confined to the renderer sandbox per the description - achieving host-level compromise would require an additional sandbox-escape not described in this CVE. No authentication is required (PR:N). Updating to 156.0.8078.47 or later remediates the issue. |
| Impact | The input CVSS 3.1 vector (CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H, base 8.8) describes a network-reachable, low-complexity, unauthenticated flaw that requires user interaction (victim visits a crafted HTML page) and yields high confidentiality, integrity, and availability impact - consistent with a browser renderer memory-corruption bug. A critical nuance the raw 8.8 obscures: the description states code execution occurs 'inside the sandbox,' so this alone does not grant host compromise and would typically need to be chained with a separate sandbox-escape to achieve full RCE on the endpoint; Chromium itself rated the security severity only 'Medium.' No CISA KEV listing and no public exploit (POC) are present in the provided data, so exploitation status is 'no public exploit identified at time of analysis.' No EPSS score and no SSVC decision data were supplied, so exploitation probability and automatability cannot be assessed from this input. Net: this is a legitimate, broadly-relevant browser vulnerability worth prompt patching given Chrome's ubiquity and the unauthenticated network vector, but there is no evidence of active or widespread exploitation, and the sandbox confinement plus required user interaction temper the real-world urgency relative to the 8.8 number. |
| Exploit ScenarioDerived | An attacker hosts a malicious web page (or injects malicious content into a site/ad the victim loads) that triggers the API memory-corruption bug in the Chrome renderer. When the victim browses to the page, the attacker achieves arbitrary code execution confined to the browser sandbox, which would then need to be combined with a sandbox-escape to reach the host. No public proof-of-concept is identified in the provided data. |
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Alert meAnalysisAIv1 – Oct 21, 2026
Memory corruption in Google Chrome's browser API handling allows remote code execution inside the renderer sandbox when a victim loads a crafted HTML page in any build prior to 156.0.8078.47. Exploitation is unauthenticated from the network but requires user interaction, since the target must navigate to or render attacker-controlled content; successful abuse yields high confidentiality, integrity, and availability impact within the sandboxed renderer rather than at the host level. A vendor patch is available in 156.0.8078.47, and no public exploit code or confirmed active exploitation was identified at time of analysis.
RemediationAI
Upgrade Google Chrome to 156.0.8078.47 or later - the vendor-released patch - and confirm the version via chrome://version; the fix is documented in the Stable Channel Update for Desktop (https://chromereleases.googleblog.com/2026/10/stable-channel-update-for-desktop_02018666648.html) with engineering detail in Chromium issue 497494634. Because the browser's own updater may lag on managed fleets, push the update through enterprise policy or your software deployment tooling and restart browsers so the new binary is actually loaded. If immediate upgrading of a subset of endpoints is impossible, the practical compensating controls are to force all rendering of untrusted web content through a hardened remote-browsing or virtualization tier (trade-off: added latency and infrastructure cost) and to restrict or disable risky API surfaces via enterprise policy where a relevant kill switch exists (trade-off: it can break legitimate web applications). Note that renderer-level mitigations such as site isolation and the Chrome sandbox reduce, but do not eliminate, the exposure described here, since this CVE's code execution is already scoped inside that sandbox and only limits blast radius rather than blocking the bug.
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
The flaw is classified as CWE-119 (improper restriction of operations within the bounds of a memory buffer), a classic memory-safety class affecting the Chromium browser engine's API surface, where JavaScript-exposed interfaces in the renderer mishandle attacker-influenced data and corrupt heap or stack memory. Because Chrome renders untrusted web content through a multi-process model, the immediate consequence is arbitrary code execution inside the renderer's sandbox (per the Chromium severity rating of Medium), so full host compromise would require chaining a separate sandbox escape that is not part of this CVE. The CVSS:3.1 vector AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H confirms a network-reachable, low-complexity, unauthenticated attack that succeeds only with victim interaction and is scoped to a single security authority. Affected builds are Chrome versions earlier than 156.0.8078.47 across desktop channels; Chromium issue 497494634 tracks the underlying defect.
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- Exploit and PoC references, threat intelligence from 22 sources
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Severity by source
AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Remote crafted HTML page requires victim interaction (UI:R) with no auth (PR:N); scope unchanged as execution stays in-sandbox (S:U) with high C/I/A within the renderer.
Primary rating from Vendor (google).
CVSS VectorVendor: google
Lifecycle Timeline
3DescriptionCVE.org
Memory corruption in API in Google Chrome prior to 156.0.8078.47 allowed a remote attacker to execute arbitrary code inside the sandbox via a crafted HTML page. (Chromium security severity: Medium)
Executive ViewAI
Google Chrome builds prior to 156.0.8078.47 carry a high-severity memory-corruption flaw that can allow code execution inside the renderer sandbox when users load crafted HTML, putting browser-session data and availability at risk for affected users. Leadership should prioritize rapid fleet remediation because Chrome is widely used, even though no public exploit identified at time of analysis and Vendor-released patch: 156.0.8078.47 is available.
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
A buffer overflow occurs when a program writes more data to a memory buffer than it was allocated to hold, causing the excess data to spill into adjacent memory regions.
Remote Code Execution represents the critical moment when an attacker successfully runs arbitrary code on a target system without physical access.
Use-after-free vulnerability in the DisplayObject class in the ActionScript 3 (AS3) implementation in Adobe Flash Player
V8 in Google Chrome prior to 54.0.2840.90 for Linux, and 54.0.2840.85 for Android, and 54.0.2840.87 for Windows and Mac
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Use-after-free vulnerability in the BitmapData class in the ActionScript 3 (AS3) implementation in Adobe Flash Player 13
EUVD-2026-105492
GHSA-c636-wp6p-392p
NVD
CVE.org
EPSS
Exploit-DB