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 targeting Autofill
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ExploitTrigger memory corruption in Autofill
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ExecutionRead out-of-bounds sandbox memory
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ImpactExfiltrate leaked renderer-process 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 load attacker-controlled content that exercises the Autofill component, and the CVSS UI:R metric confirms user interaction is mandatory - the attack cannot succeed without a user visiting or interacting with a crafted HTML page. No authentication is required (PR:N). Impact is limited to reading memory within the renderer sandbox (S:U, no scope change); this is an information-disclosure primitive, not code execution or sandbox escape, so on its own it does not grant control of the host and would typically need to be chained with a separate sandbox-escape vulnerability for meaningful compromise. Affected builds are Chrome prior to 156.0.8078.47; updated versions are not exploitable. |
| Impact | This is a genuine but moderate-priority issue, not a top-tier emergency. The CVSS 3.1 vector (AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N, base 6.5) indicates remote, low-complexity, unauthenticated reach, but exploitation is gated on user interaction (UI:R) and the impact is confidentiality-only (C:H, I:N, A:N) with no scope change (S:U) - meaning the flaw yields a read of memory *inside* the renderer sandbox rather than code execution or sandbox escape. The EPSS score is low (0.22%, 11th percentile), consistent with an info-leak primitive that requires a crafted page and a victim visit rather than a wormable or server-side bug. There is no CISA KEV listing and no POC referenced in the supplied data, so this is 'no public exploit identified at time of analysis.' Signals are largely consistent: a Medium Chromium-rated bug, modest EPSS, no exploitation evidence. One caveat to verify: the description says 'potentially read memory inside the sandbox,' which is more bounded than a full C:H high-confidentiality rating would normally imply - the official C:H may slightly overstate the realistic disclosure scope. Memory-read bugs like this are typically chained with a separate sandbox-escape bug to be dangerous on their own. |
| Exploit ScenarioDerived | An attacker hosts a malicious web page (or injects crafted HTML into a site the victim visits) that abuses the Autofill component to trigger memory corruption. When a user with a vulnerable Chrome build loads the page and interacts as required, the attacker reads out-of-bounds memory from inside the renderer sandbox, potentially leaking sensitive in-process data such as pointers or credential fragments. No public exploit code was identified in the provided data. |
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Alert meAnalysisAIv1 – Oct 21, 2026
Memory corruption in the Autofill component of Google Chrome prior to 156.0.8078.47 lets a remote, unauthenticated attacker read memory beyond intended bounds inside the renderer sandbox by convincing a victim to load a crafted HTML page. Successful exploitation requires user interaction (CVSS UI:R) and yields only information disclosure within the sandbox - confidentiality impact is high but there is no integrity or availability impact, no scope change, and no direct path to host compromise without chaining a separate sandbox escape. No public exploit code has been identified at time of analysis and EPSS is low at 0.22% (11th percentile), though vendor-released patches are available and should be applied as routine hygiene rather than emergency response.
RemediationAI
Vendor-released patch: upgrade Google Chrome to 156.0.8078.47 or later - the stable-channel update is documented at https://chromereleases.googleblog.com/2026/10/stable-channel-update-for-desktop_02018666648.html, and the typical path is to let the browser's auto-updater run and then fully relaunch Chrome (verifying via chrome://settings/help that the version reads 156.0.8078.47 or higher), or to push the fixed build through enterprise software deployment/Chrome Browser Cloud Management. If an immediate fleet-wide upgrade is not possible, reduce exposure by disabling the Autofill feature via the enterprise policies AutofillAddressEnabled and AutofillCreditCardEnabled (set to 0) - this removes the vulnerable parsing path from normal browsing but degrades user productivity and forces manual form entry, so it should be time-boxed until patching completes; because exploitation additionally requires the victim to open attacker-controlled HTML, restricting users from untrusted web content and phishing links provides only partial mitigation and is not a substitute for the update. Downstream Chromium-based browsers should be updated to a build that has merged the corresponding upstream fix, and administrators should monitor the Chromium issue tracker entry (https://issues.chromium.org/issues/536607604) for any change in severity or exploitation status.
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), consistent with the vendor's 'Buffer Overflow' tagging and the Chromium security severity rating of Medium. The affected surface is Autofill, the Chrome feature that parses page form structures and matches field metadata against stored address and payment profiles, which involves handling attacker-influenced DOM attributes and form field names inside the renderer process. A crafted HTML page can drive that parsing logic into an out-of-bounds read, returning adjacent heap contents to script running in the renderer. Because the disclosure is confined to the renderer's own address space (CVSS S:U, no scope change), this is an information-disclosure primitive rather than a code-execution or sandbox-escape bug; extracted memory is most useful as an ASLR/heap-layout oracle that lowers the difficulty of a follow-on exploit. The CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N vector confirms network delivery, no privileges required, and a mandatory user gesture (the victim must visit or interact with the crafted page), and the description states affected builds are Chrome versions earlier than 156.0.8078.47.
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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 page (AV:N/AC:L/PR:N) but requires a user to load it (UI:R); sandboxed read-only disclosure gives C:H, I:N, A:N with no scope change.
Primary rating from Vendor (google).
CVSS VectorVendor: google
Lifecycle Timeline
4DescriptionCVE.org
Memory corruption in Autofill 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: Medium)
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-2026-105600
GHSA-8gp3-fhw8-9xfr
NVD
CVE.org
EPSS
Exploit-DB