EUVD-2026-111473
GHSA-256q-69x3-6m3r
Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata – not a confirmed exploit chain
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AccessLure victim to attacker-controlled page
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DeliveryServe crafted HTML triggering Paint
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ExploitCorrupt memory in rendering path
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ExecutionExecute code outside sandbox
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ImpactCompromise victim host
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 open or navigate to a crafted HTML page in an unpatched Google Chrome prior to 156.0.8078.73 (UI:R - user interaction is the key limiting factor). No authentication or privileges are needed (PR:N) and the attack works over the network against default configurations. The distinguishing condition claimed by the description is that the Paint-component memory corruption escapes the browser sandbox, which, if accurate, removes the usual renderer-sandbox mitigation; however the precise trigger and the reliability of the escape are not described in the available sources. |
| Impact | Signals conflict sharply and must be weighed together. NVD scores this 9.6 CRITICAL (CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H), with the scope change (S:C) and high triad reflecting the description's claim that memory corruption in the Paint component allows code execution 'outside the sandbox' - i.e. a full sandbox escape from a single crafted page. Yet Google's own Chromium rating is only 'Medium', a notable divergence that suggests the practical exploitability or reliability is lower than the 9.6 implies - verify the real-world severity against the vendor's assessment. The EPSS score is low (0.22%, 13th percentile), the CVE is NOT on the CISA KEV list, and there is no public exploit identified at time of analysis, so there is currently no evidence of active or widespread exploitation. Against that, the vuln.today decision label is 'act_now' and a patch is already shipped, which argues for prompt patching regardless of the low EPSS. Net: treat as a high-priority patch item because of Chrome's ubiquity and the claimed sandbox-escape impact, but recognize the Medium Chromium rating and low EPSS indicate this is not (yet) a mass-exploited emergency. |
| Exploit ScenarioDerived | An attacker hosts or compromises a web page containing crafted HTML that triggers the memory-corruption flaw in Chrome's Paint component when rendered. A victim running an unpatched Chrome (before 156.0.8078.73) visits the page, and the corruption is leveraged to execute arbitrary code outside the browser sandbox on the victim's host. No public exploit code has been identified at the time of this analysis. |
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Alert meAnalysisAIv1 – Oct 28, 2026
Arbitrary code execution outside the browser sandbox is the potential impact of memory corruption in Google Chrome's Paint component when a victim opens a crafted HTML page, affecting versions prior to 156.0.8078.73. The signal set is mixed: CVSS is 9.6 and the priority label is act_now, but EPSS is only 0.22% and no public exploit was identified at time of analysis. Google has released a fixed build.
RemediationAI
Vendor-released patch: Google Chrome 156.0.8078.73. Update Chrome to that build or later using the stable-channel release referenced in the vendor advisory (https://chromereleases.googleblog.com/2026/10/stable-channel-update-for-desktop_0562499947.html). The supplied data documents no specific workaround; applying the vendor update is the remediation step provided, and the Chromium issue tracker (https://issues.chromium.org/issues/540025369) can be used to confirm fix details.
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
CWE-119 (improper restriction of operations within the bounds of a memory buffer) points to a buffer-boundary flaw in Chrome's Paint rendering code. The supplied CVSS vector (AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H) indicates a network-delivered attack that needs only user interaction, with scope change and high confidentiality, integrity, and availability impact; the S:C component is consistent with the description's claim that code execution can escape the browser sandbox. The exact trigger, affected platforms, and reliability of the sandbox escape are not described in the available sources.
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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:C/C:H/I:H/A:H
Remote crafted-page delivery (AV:N) needs a victim visit (UI:R) but no auth (PR:N); claimed sandbox escape justifies S:C with full C/I/A impact on the host.
Primary rating from Vendor (google).
CVSS VectorVendor: google
Lifecycle Timeline
3DescriptionCVE.org
Memory corruption in Paint in Google Chrome prior to 156.0.8078.73 allowed a remote attacker to potentially execute arbitrary code outside the sandbox via a crafted HTML page. (Chromium security severity: Medium)
Executive ViewAI
Google Chrome versions prior to 156.0.8078.73 contain a critical memory corruption flaw in the Paint component that, if exploited, could allow an attacker to execute arbitrary code outside the browser sandbox. This means a successful attack could lead to full system compromise, data theft, or malware installation on affected endpoints. With a CVSS score of 9.6 and a priority label of 'act now,' leadership should prioritize remediation because browser-based attacks are a common initial access vector for ransomware and other serious incidents.
Apply vendor patch.
Threat Intelligence Overview
NVD
CVE.org
EPSS
VulDB
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.
Exploit-DB