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Google Chrome EUVDEUVD-2026-105713

| CVE-2026-113296 MEDIUM
Buffer Overflow (CWE-119)
2026-10-20 chrome-cve-admin@google.com GHSA-w79v-rvw8-hjfw
6.5
CVSS 3.1 · Vendor: google
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Attack ChainAIDerived

Hypothetical attack flow derived from CVE metadata – not a confirmed exploit chain

  1. Access
    Lure victim to crafted web page
  2. Delivery
    Serve malicious HTML to Chrome
  3. Exploit
    Trigger memory corruption in Actor
  4. Execution
    Read sandbox-internal memory
  5. Impact
    Exfiltrate leaked data

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 actively load attacker-controlled crafted HTML in Google Chrome versions prior to 156.0.8078.47 (UI:R) - there is no default-configuration, zero-click path. No authentication is required (PR:N). The impact is further limited in two ways: it is a memory-read/disclosure only (no integrity or availability impact, I:N/A:N), and the read is bounded to memory inside the renderer sandbox, so the flaw alone does not achieve code execution or sandbox escape and would typically need to be chained with a sandbox-escape bug for higher impact. Patched Chrome installations (156.0.8078.47 and later) are not affected.

Impact

Signals are consistent and point to a genuinely moderate - not critical - issue. The CVSS 3.1 vector (AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N, base 6.5) shows network-reachable, unauthenticated exploitation requiring user interaction (visiting a crafted page), with a pure confidentiality impact (C:H, I:N, A:N) - this is a memory-disclosure (info-leak) bug, not code execution. Crucially, Google/Chromium rated the security severity 'Low', and the impact is explicitly bounded to reading memory INSIDE the sandbox, meaning it does not itself escape Chrome's sandbox. EPSS reinforces low urgency at 0.22% (11th percentile). There is no CISA KEV listing and no public exploit identified, so no active-exploitation pressure. The C:H rating in the vector sits in mild tension with the vendor's 'Low' severity and the 'potentially read memory inside the sandbox' wording, which suggests a constrained rather than arbitrary read - treat the confidentiality impact as real but limited. Net: a legitimate patch-in-normal-cycle browser fix, not an emergency; priority is driven almost entirely by Chrome's ubiquity rather than by exploitation signals.

Exploit ScenarioDerived

An attacker hosts or compromises a web page containing crafted HTML that triggers the memory-corruption flaw in Chrome's Actor component when a victim visits it. The bug lets the attacker read adjacent memory within the renderer sandbox, potentially leaking sensitive in-process data. No public exploit code has been identified, and successful exploitation requires the victim to actively load the malicious page.

This Month Plan within 30 days. Why: MEDIUM severity (CVSS 4.0-6.9).
Patch available 0.2% exploitation probability (EPSS)

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AnalysisAIv1 – Oct 21, 2026

Memory disclosure inside the Chrome renderer sandbox affects Google Chrome versions prior to 156.0.8078.47; a remote attacker can trigger it only when the victim loads a crafted HTML page, yielding read access to sandboxed process memory with no integrity or availability impact. No public exploit identified at time of analysis, and EPSS is low at 0.22% (11th percentile). Google has released Chrome 156.0.8078.47 as the fixed version.

RemediationAI

Upgrade Google Chrome to 156.0.8078.47 or later; Google lists this as the fixed stable-channel release in the advisory at https://chromereleases.googleblog.com/2026/10/stable-channel-update-for-desktop_02018666648.html. After updating, restart the browser so the new binary is active, and use enterprise update policies to enforce the minimum version across managed fleets. No practical configuration workaround removes the memory-corruption condition; until update deployment completes, reduce exposure by preventing unpatched Chrome from loading untrusted web content, for example via browser isolation or restricted browsing policies, accepting the added latency and usability trade-offs.

Affected VersionsENISA

Chrome 156.0.8078.47 <156.0.8078.47

Affected Packages

euvd chrome fix: 156.0.8078.47

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

CVE-2026-113296 is a CWE-119 memory-corruption flaw in the Chrome "Actor" component that manifests as an out-of-bounds read inside the renderer sandbox. The vulnerable code fails to properly bound a memory operation when processing crafted HTML, allowing a renderer to read memory beyond the intended buffer; because Chrome isolates renderer content in a sandbox, the disclosed data is limited to the compromised renderer's address space rather than the whole browser process. The CVSS vector AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N reflects a network-reachable flaw requiring the user to load attacker-controlled HTML, with confidentiality-only impact and no demonstrated code execution or sandbox escape from this bug alone. No CPE strings were supplied; EUVD and Chrome release data identify Chrome builds before 156.0.8078.47 as affected. The Chromium issue is tracked at https://issues.chromium.org/issues/524316342, and ENISA EUVD-2026-105713 mirrors this CVE.

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  • Exploit and PoC references, threat intelligence from 22 sources

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Severity by source

Vendor (google) PRIMARY 6.5 MEDIUM
AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N
vuln.today AI 6.5 MEDIUM

Crafted HTML is network-delivered (AV:N) and loads without special difficulty (AC:L) by an unauthenticated user who must visit the page (UI:R); impact is memory disclosure only, so C:H, I:N, A:N, S:U.

3.1 AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N
4.0 AV:N/AC:L/AT:N/PR:N/UI:P/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N

Primary rating from Vendor (google).

CVSS VectorVendor: google

Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
Required
Scope
Unchanged
Confidentiality
High
Integrity
None
Availability
None

Lifecycle Timeline

4
CVSS changed
Oct 21, 2026 - 16:54 NVD
6.5 (MEDIUM)
Patch available
Oct 20, 2026 - 23:20 EUVD
CVE Published
Oct 20, 2026 - 22:19 cve.org
MEDIUM 6.5
CVE Published
Oct 20, 2026 - 22:19 cve.org
UNKNOWN (no severity yet)

DescriptionCVE.org

Memory corruption in Actor 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

EPSS Score
0.2%
Top 89% exploitable
Prevalence
Ubiquitous
Google Chrome is the dominant desktop browser worldwide
Data Quality
4 sources
Confidence: Medium

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.

SignalValue
Severity MEDIUM
CISA KEV No
Public POC No
EPSS 0.2%
Patch available Yes
Active threat No
Deciding rule
MEDIUM severity (CVSS 4.0-6.9)
What every action level means
Emergency Immediate action required. Criteria: CRITICAL + in CISA KEV (actively exploited) without patch, OR CRITICAL + EPSS > 30% without patch, OR CRITICAL + active threat signals without patch.
Act Now Prioritize within 24-48h. Criteria: in KEV with patch available, OR CRITICAL + public POC, OR HIGH + EPSS > 10%, OR CRITICAL + active threat, OR any CRITICAL severity.
This Week Schedule remediation this week. Criteria: HIGH severity (CVSS 7.0-8.9). Patch within normal change window.
This Month Plan within 30 days. Criteria: MEDIUM severity (CVSS 4.0-6.9), lower exploitation probability. Include in regular patch cycle.
Monitor Track and reassess. Criteria: LOW severity (CVSS 0.1-3.9), minimal exploitation risk. No immediate action needed.

SSVC AssessmentENISA

SSVC Decision· derived
Scheduled
Exploitation· derived
None
System Exposure· derived
Open
Automatable· derived
No
Human Impact· derived
High

Priority Score

32
Low Medium High Critical
KEV: 0
EPSS: 0
CVSS: +32
PoC: 0
Weaponized: 0
Threat intel: 0
Gov advisory: 0

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.

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