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Google Chrome CVE-2026-95276

| EUVDEUVD-2026-89122 HIGH
Improper Input Validation (CWE-20)
2026-09-23 vendor:ubuntu GHSA-xgvv-mrwm-65w7
8.3
CVSS 3.1 · Vendor: vendor:ubuntu
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Attack ChainAIDerived

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

  1. Access
    Host malicious web page
  2. Delivery
    Lure victim to browse (UI:R)
  3. Exploit
    Trigger CWE-20 input-validation flaw
  4. Execution
    Corrupt renderer memory with grooming
  5. Persist
    Cross sandbox boundary (S:C)
  6. Impact
    Execute code / full compromise

Vulnerability Assessment

Weakness
CWE
OWASP Top 10:2025
A05:2025 - Injection
ASVS 5.0
V2 - Validation and Business Logic Input validation, allowlisting
Exploitation Conditions

Exploitation requires a user running Google Chrome before 154.0.8037.57 to load attacker-controlled web content (UI:R - the victim must navigate to or interact with a malicious or compromised page); no authentication or prior access is needed (PR:N). What limits it: high attack complexity (AC:H) implies the attacker must satisfy non-trivial preconditions such as specific memory state, heap grooming, or timing/race windows for reliable success, and the user-interaction requirement means it cannot be triggered against an idle browser. It affects default Chrome configurations - no special feature flag is documented, but the exact triggering component is undisclosed (chromium issue 517730821 is restricted).

Impact

This is a genuinely high-priority browser vulnerability, though not the most severe class within its cohort. The CVSS 3.1 vector (8.3, AV:N/AC:H/PR:N/UI:R/S:C/C:H/I:H/A:H) indicates a network-reachable, unauthenticated flaw with full confidentiality/integrity/availability impact and a scope change (S:C) - consistent with a renderer-level input-validation bug (CWE-20) that crosses the sandbox boundary, i.e. an RCE-class or sandbox-escape-class issue rather than mere information disclosure. Two signals temper the raw score: AC:H means exploitation is non-trivial (requires specific heap grooming, timing, or state setup), and UI:R means the victim must visit or interact with attacker-controlled content. EPSS is not provided, and there is no CISA KEV listing and no public POC, so there is no evidence of active or automated exploitation - this is 'no public exploit identified at time of analysis.' Note a conflict between the metadata and the vector: the sole Tag is 'Information Disclosure,' but I:H and A:H make that label too narrow; the impact is memory-corruption/code-execution-class, not a pure disclosure. Bottom line: patch-urgent because of ubiquity and the S:C/C:H/I:H/A:H profile, but AC:H and required user interaction make mass exploitation less immediate than an AC:L drive-by would be.

Exploit ScenarioDerived

An attacker hosts or injects a malicious web page (e.g. via a compromised ad network or a link sent to the victim). When a user running a vulnerable Chrome build browses to it, crafted input triggers the CWE-20 validation flaw; after some grooming/timing (AC:H), memory is corrupted and the scope-changing bug lets attacker code escape the renderer's constraints. No public exploit code is currently identified.

This Week Schedule remediation this week. Why: HIGH severity (CVSS 7.0-8.9).
Patch available 0.5% exploitation probability (EPSS)

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AnalysisAIv2 – Sep 29, 2026

Improper input validation in Google Chrome before 154.0.8037.57 can be triggered when a victim loads attacker-controlled web content, yielding a scope-changed impact rated high for confidentiality, integrity, and availability (CVSS 8.3). Exploitation is network-reachable without credentials (PR:N) but demands victim interaction (UI:R) plus non-trivial preconditions such as specific memory state, heap grooming, or timing windows (AC:H), and the affected component is undisclosed because chromium issue 517730821 is access-restricted. No public exploit code and no confirmed active exploitation were identified at time of analysis; a vendor patch is available in the Chrome stable channel at 154.0.8037.57.

Earlier versions of this analysis (1)
v1 Sep 24, 2026 - 02:40

No product-level impact can be determined for CVE-2026-95276, an Ubuntu-sourced CVE record that currently carries no published description, no CVSS score or vector, no CWE mapping, no CPE data, and no referenced advisories. Because the affected component, deployment mode, and attack surface are all undefined, it is impossible to say who is affected beyond the fact that the record is attributed to the Ubuntu vendor stream, which typically indicates a package maintained in Ubuntu's archive. At present there is no public exploit identified at time of analysis, but this reflects the total absence of advisory content rather than a confirmed clean record; EPSS, KEV status, and POC availability were not supplied and must not be assumed to be negative.

RemediationAI

Vendor-released patch: Chrome 154.0.8037.57 - upgrade to 154.0.8037.57 or later via Chrome's built-in updater (chrome://settings/help) or, for Linux/Ubuntu deployments, through the distribution package stream that delivers the same fixed build, and confirm the running version after restarting the browser. The authoritative guidance is the Chrome stable channel advisory at http://chromereleases.googleblog.com/2026/09/stable-channel-update-for-desktop_0856730748.html, with the underlying defect tracked in the restricted issue https://issues.chromium.org/issues/517730821. Because the flaw is reachable only when a user loads attacker-controlled web content and the triggering component is undisclosed, there is no targeted configuration workaround; interim options and their trade-offs are: keep Chrome's site isolation and sandboxing enabled (default, limits the scope-change impact but does not remove the bug); enforce managed allow-lists or proxy-level blocking of untrusted sites for high-risk users (breaks general browsing and is operationally heavy); and restrict or disable JavaScript/JIT-dependent content on untrusted origins via enterprise policy (materially reduces the attack surface since AC:H conditions become harder to satisfy, but breaks most modern web applications). None of these substitutes for patching, and since no public exploit code or confirmed active exploitation was identified at time of analysis, upgrade on a normal patch cycle with priority given to internet-exposed and high-value user populations.

Affected VersionsENISA

Chrome 154.0.8037.57 <154.0.8037.57

Affected Packages

euvd chrome fix: 154.0.8037.57

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 class is CWE-20 (Improper Input Validation), and the affected technology is the Google Chrome browser rendering/browser stack, delivered through the Chrome stable channel advisory. The assessed vector CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:H/I:H/A:H describes a remotely reachable flaw that converts malicious web content into a high-integrity and high-availability impact across a security scope boundary (S:C), which in a browser architecture typically means a compromised low-privilege component influencing a higher-privilege one. The AC:H rating indicates the attacker must satisfy non-trivial conditions - for example, precise memory layout, heap grooming, or a timing/race window - rather than exploiting a trivially deterministic bug, and UI:R confirms the flaw cannot be triggered against an idle browser. Notably, the ENISA tag 'Information Disclosure' understates the assessed vector, which scores high integrity and availability impact in addition to confidentiality; the restricted chromium issue means Google has not publicly named the component or the specific validation failure, so the exact parsing or memory-handling path is not independently confirmable. EUVD records the affected artifact as "Chrome 154.0.8037.57 <154.0.8037.57", consistent with all builds prior to that release, and the Ubuntu vendor reporting indicates Linux desktop packages are in scope alongside the upstream Chrome builds. Affected default configurations require no special feature flag to be enabled to be exposed.

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Severity by source

Vendor (vendor:ubuntu) PRIMARY 8.3 HIGH
AV:N/AC:H/PR:N/UI:R/S:C/C:H/I:H/A:H
vuln.today AI 8.3 HIGH

Network-delivered via web content with no auth (AV:N/PR:N), needs user to visit a page (UI:R) and non-trivial grooming (AC:H); sandbox escape gives S:C with full C/I/A impact.

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

Primary rating from Vendor (vendor:ubuntu).

CVSS VectorVendor: vendor:ubuntu

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

Lifecycle Timeline

1
CVSS changed
Sep 29, 2026 - 19:22 NVD
8.3 (HIGH)

DescriptionCVE.org

[Unknown description]

Executive ViewAI

Why It Matters

Google Chrome versions prior to 154.0.8037.57 contain a high-severity input validation flaw that can be triggered simply by a user browsing attacker-controlled web content, with a scope-changed impact across confidentiality, integrity, and availability (CVSS 8.3). Because Chrome is the default or primary browser on the vast majority of corporate endpoints, this affects essentially every employee who browses the web, and a successful exploitation could hand an attacker code execution in the user's context, bypassing the browser's security boundary. The vendor has already released a fixed build, so the organizational risk is driven primarily by patch-deployment latency rather than by gaps in available remediation.

Business Impact: High
Compensating Controls

Apply vendor patch.

Threat Intelligence Overview

EPSS Score
0.5%
Top 62% exploitable
Prevalence
Ubiquitous
Google Chrome is among the most widely deployed browsers worldwide
Data Quality
3 sources
Confidence: Low

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 HIGH
CISA KEV No
Public POC No
EPSS 0.5%
Patch available Yes
Active threat No
Deciding rule
HIGH severity (CVSS 7.0-8.9)
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
High

Priority Score

42
Low Medium High Critical
KEV: 0
EPSS: 0
CVSS: +42
PoC: 0
Weaponized: 0
Threat intel: 0
Gov advisory: 0

Attack Technique

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

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Vendor StatusVendor

SUSE

Severity: Critical
Product Status
SUSE Package Hub 15 SP7 Fixed
openSUSE Leap 16.0 Fixed
openSUSE Tumbleweed Fixed
SUSE Package Hub 15 SP7 Affected

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