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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ExploitTrigger memory corruption in DevTools component
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ExecutionPerform out-of-bounds read within renderer
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ImpactExfiltrate leaked sandbox memory
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 a victim to load attacker-controlled crafted HTML in Google Chrome versions prior to 156.0.8078.47 (UI:R - user must visit/open the malicious page); it cannot be triggered without this interaction. The flaw resides in the DevTools component and yields only an in-sandbox memory read, so impact is limited to confidentiality disclosure of data accessible within the renderer sandbox - it does not by itself achieve sandbox escape, code execution, or persistence. The primary limiting factors are the required user interaction and the sandbox containment of the leaked data; no authentication is required (PR:N) and no non-default configuration is needed, as DevTools ships with Chrome. |
| Impact | This is a genuinely lower-tier Chrome vulnerability despite a moderate 6.5 CVSS base score, and the signals are internally consistent rather than conflicting. The CVSS vector (AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N) describes a network-reachable, low-complexity, unauthenticated flaw that nonetheless requires user interaction (visiting a page) and produces only a confidentiality impact (C:H) with no integrity or availability effect and no scope change - meaning the defect leaks memory but does NOT escape the renderer sandbox. Google itself rated the Chromium security severity as Low, which aligns with the limited, sandbox-contained read primitive. EPSS corroborates low real-world urgency: 0.22% probability at the 12th percentile. There is no CISA KEV listing and no public exploit identified in the provided data, so there is no evidence of active exploitation. No SSVC decision data was provided. The only mild tension is the C:H rating against a vendor 'Low' severity - this reflects that an in-sandbox memory read, while high-impact for confidentiality in the abstract, is operationally constrained because the leaked data stays within the renderer sandbox and still requires luring a user to a malicious page. Bottom line: patch it on the normal Chrome auto-update cadence; it is not an emergency-priority issue. |
| Exploit ScenarioDerived | An attacker hosts or compromises a web page containing crafted HTML that triggers the DevTools memory-corruption condition when rendered, and lures a victim into opening it. The resulting out-of-bounds read lets the attacker potentially recover sensitive memory contents (e.g., data from other pages or process memory) from within the renderer sandbox. No public exploit code was identified at the time of analysis, and user interaction is required. |
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Alert meAnalysisAIv1 – Oct 21, 2026
Memory corruption in the DevTools component of Google Chrome before 156.0.8078.47 can allow a remote attacker to read memory inside the renderer sandbox when a victim loads a crafted HTML page. Exploitation requires user interaction and is confined to in-sandbox information disclosure; it does not by itself provide sandbox escape or code execution. No CISA KEV entry or public exploit was identified at time of analysis, and EPSS is low at 0.22% (12th percentile).
RemediationAI
Upgrade Google Chrome to 156.0.8078.47 or later; vendor-released patch: 156.0.8078.47. Confirm the installed build via chrome://version and fully restart the browser after updating, and use Chrome auto-update or enterprise update policies to prevent systems from remaining on older builds. If immediate updating is not possible, reduce exposure by restricting browsing of untrusted HTML and isolating Chrome usage, but note that disabling DevTools through policy would disrupt developer workflows and is not confirmed to remove the underlying memory-corruption path, so it should not be treated as a reliable substitute for patching. The vendor advisory is available at 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
The flaw is classified as CWE-119, improper restriction of operations within the bounds of a memory buffer, in Chromium's DevTools component. Crafted HTML can trigger an out-of-bounds memory access that leads to disclosure of data accessible within the renderer sandbox. The assessed CVSS:3.1 vector AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N confirms remote reachability without privileges, but requires a user to open the malicious page; confidentiality impact is high while integrity and availability impacts are none. The Chromium security severity is Low, and no CPE identifiers were supplied in the available data.
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Severity by source
AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N
Network-reachable via a crafted web page with no auth (AV:N/PR:N) but requires the user to open it (UI:R); impact is a confidentiality-only in-sandbox read with no scope change (S:U/C:H/I:N/A:N).
Primary rating from Vendor (google).
CVSS VectorVendor: google
Lifecycle Timeline
4DescriptionCVE.org
Memory corruption in DevTools in Google Chrome prior to 156.0.8078.47 allowed a remote attacker to potentially read memory inside the sandbox via a crafted HTML page. (Chromium security severity: Low)
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.
EUVD-2026-105737
GHSA-39jf-5587-ccvv
NVD
CVE.org
EPSS
Exploit-DB