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Google Chrome CVE-2026-113045

| EUVDEUVD-2026-105559 MEDIUM
Out-of-bounds Read (CWE-125)
2026-10-20 chrome-cve-admin@google.com GHSA-qj3q-cwvh-h7f9
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
    Host crafted HTML page
  2. Exploit
    Lure Android Chrome user to visit
  3. Execution
    Trigger out-of-bounds read in Offline component
  4. Impact
    Leak adjacent sandbox memory

Vulnerability Assessment

Weakness
CWE
ASVS 5.0
V15 - Secure Coding and Architecture Bounds checking, read limits
MITRE ATT&CK

1 technique across 1 tactic: Collection

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 Chrome on Android (version prior to 156.0.8078.47) and navigate to attacker-controlled crafted HTML content that exercises the 'Offline' feature's parsing path; this user-interaction requirement (CVSS UI:R) is the primary limiting factor. No authentication or elevated privileges are needed (PR:N). The impact is strictly a memory read bounded to inside the renderer sandbox, yielding information disclosure only (C:H, I:N, A:N) and not, by itself, code execution or sandbox escape. Limiting factors: the target must be an un-updated Android Chrome build and the user must load the malicious page.

Impact

This is a genuine but non-urgent patch-management item rather than an emergency. The CVSS 3.1 vector (AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N, 6.5 Medium) indicates a remote, low-complexity, unauthenticated attack that nonetheless requires user interaction (the victim must load a crafted HTML page), with confidentiality-only impact (C:H, I:N, A:N) - consistent with a CWE-125 out-of-bounds read that leaks memory but does not corrupt it. Google's own Chromium rating is Medium, aligning with the Medium CVSS. Exploitation-probability signals reinforce low urgency: EPSS is 0.23% (13th percentile), it is NOT listed in CISA KEV, and no public exploit code is referenced - so there is no public exploit identified at time of analysis. No SSVC decision data was provided in the input. The signals are mutually consistent (low EPSS, no KEV, Medium severity, user-interaction requirement), so there is no conflict to flag; the key caveat is that the memory read is explicitly bounded to 'inside the sandbox,' limiting it to information disclosure within Chrome's renderer rather than full system compromise. Net: a real priority for routine browser updating given Chrome's enormous footprint, but not a drop-everything issue absent any exploitation evidence.

Exploit ScenarioDerived

An attacker hosts a malicious or compromised web page and lures an Android user running an outdated Chrome (prior to 156.0.8078.47) to visit it; the page's crafted content triggers the out-of-bounds read in the Offline component, allowing the attacker to potentially read adjacent memory within the renderer sandbox and exfiltrate it (e.g., to defeat ASLR or leak sensitive in-process data). No public exploit code is identified at time of analysis, and the attack requires user interaction (navigating to the page) with low attack complexity.

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

Out-of-bounds read in the Offline component of Google Chrome on Android allows a remote attacker who convinces a user to open a crafted HTML page to read memory inside the renderer sandbox, exposing potentially sensitive process data. Only Android builds prior to 156.0.8078.47 are affected; the CVSS 3.1 score is 6.5 (AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N), so exploitation requires user interaction with attacker-controlled content and yields information disclosure only - no code execution or sandbox escape is described. EPSS is low at 0.23% (13th percentile) and no public exploit code was identified at time of analysis; this is a routine patch-management item, not an emergency, with a vendor fix already shipped in Chrome 156.0.8078.47.

RemediationAI

Vendor-released patch: Chrome for Android 156.0.8078.47 (per the stable channel advisory at https://chromereleases.googleblog.com/2026/10/stable-channel-update-for-desktop_02018666648.html). Update through Google Play or your EMM/MDM managed-app channel and verify the reported version string on managed devices; Chrome's self-update on Android depends on Play services, so staged or paused rollouts can leave devices exposed longer than expected. Where immediate patching is not possible, the practical compensating control is to restrict browsing of untrusted web content on the affected builds - for example, pinning managed devices to an allowlisted set of sites or disabling Chrome on high-risk device cohorts and routing users to an alternative browser - accepting that these measures reduce usability and are not a substitute for the update. Because the flaw is confined to the renderer sandbox and requires the victim to load a crafted page, no server-side or network mitigation addresses it directly; blocking known-bad domains via DNS or proxy filtering only raises the cost of delivery. Track https://issues.chromium.org/issues/514040146 for any further vendor detail; note that Chrome advisory pages typically withhold full technical specifics until most users have updated.

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

The root cause is CWE-125 (Out-of-bounds read) in Chrome's "Offline" feature - the component that handles offline content/pages on the Android build. A logic or bounds-checking error when parsing crafted HTML lets an attacker cause the renderer to read bytes outside an allocated buffer, and those bytes may be surfaced back to the attacker's page context. Because the read occurs inside the renderer sandbox, the confidentiality impact is bounded to memory reachable within that process (C:H, I:N, A:N); the flaw is not a memory-corruption write primitive, so it does not directly enable arbitrary code execution or a sandbox escape. The vulnerability class is a classic information-disclosure read that becomes more dangerous only when chained with a separate sandbox-escape and code-execution bug. Google rates the issue Chromium security severity Medium, which aligns with the 6.5 CVSS score and the user-interaction prerequisite.

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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

Remote crafted-page delivery (AV:N/AC:L/PR:N) requires the user to visit the page (UI:R); an out-of-bounds read discloses sandbox memory (C:H) with no integrity or availability impact.

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 - 22:18 cve.org
MEDIUM 6.5
CVE Published
Oct 20, 2026 - 22:18 cve.org
UNKNOWN (no severity yet)

DescriptionCVE.org

Out of bounds read in Offline in Google Chrome on on Android 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: Medium)

Threat Intelligence Overview

EPSS Score
0.2%
Top 87% exploitable
Prevalence
Ubiquitous
Google Chrome is among the most widely deployed browsers on Android
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.

Information disclosure occurs when an application unintentionally exposes sensitive data that aids attackers in reconnaissance or directly compromises security.

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