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Full vulnerability report · 2026
CVE-2026-79243High confidence

Google Chrome: Improper Input Validation

Google · Chrome

6.5MediumCVSS 3.1
Recommended action
Scheduled

Medium technical severity with no CISA KEV confirmation; remediate through the normal risk-based patch cycle unless local exposure raises the priority.

Fix not verified
Direct vendor intelligence

Authoritative vendor CSAF and VEX advisories

Structured product status and remediation from the issuing vendor. Product-state explanations are always visible; large lists can be searched or downloaded.

1 current
CVE-2026-79243 · CSAF 2.0 · revision 3 · finalRed Hat Product Securitychromium-browser: Google Chrome: Web Origin Policy bypass via improper input validation
1 known not affected

The vendor explicitly states that these products are not affected by this CVE.

  • All currently supported Red Hat products
Summary
A flaw was found in Google Chrome's ReadingList component. This improper input validation vulnerability allows a remote attacker, who has already compromised the renderer process, to bypass the web origin policy. This bypass could enable unauthorized access to data or functionality that should be restricted to specific web domains, by using a specially crafted HTML page.
Remediation
No remediation text is recorded.
Optional official sources

National CERT insights
?CERT means Computer Emergency Response Team; CSIRT is the closely related term Computer Security Incident Response Team.

Select the national-authority views to include. The exact source language is shown on each matched advisory. Your choice is remembered on this device and encoded in the shareable URL.

Official European source

ENISA European Vulnerability Database

Official EUVD identifiers, advisory evidence and known-exploited context. Missing fields are not treated as evidence of low risk.

1 current
ENISA EUVD identifier

EUVD-2026-66044

No EUVD known-exploited evidence

Improper input validation in ReadingList in Google Chrome on on Windows prior to 152.0.7977.65 allowed a remote attacker who had compromised the renderer process to bypass web origin policy via a crafted HTML page. (Chromium security severity: Low)

EUVD state
Present in the current official mapping
Known exploitation
Not present in the current ENISA EUVD known-exploited dataset. This is not proof of no exploitation.
ENISA score
6.5 · CVSS 3.1
Advisory evidence
No linked advisory details stored yet
Recommended actionScheduled

Medium technical severity with no CISA KEV confirmation; remediate through the normal risk-based patch cycle unless local exposure raises the priority.

Fix not verified
01

What, why and how

Improper input validation in ReadingList in Google Chrome on on Windows prior to 152.0.7977.65 allowed a remote attacker who had compromised the renderer process to bypass web origin policy via a crafted HTML page. (Chromium security severity: Low)

What

Improper input validation in ReadingList in Google Chrome on on Windows prior to 152.0.7977.65 allowed a remote attacker who had compromised the renderer process to bypass web origin policy via a crafted HTML page. (Chromium security severity: Low)

Why

The product receives input or data, but it does not validate or incorrectly validates that the input has the properties that are required to process the data safely and correctly.

How

An attacker operating through a network path may attempt exploitation without authentication after a user interaction. If successful, the issue may cause the confidentiality, integrity or availability impact described by the vendor.

What

Improper input validation in ReadingList in Google Chrome on on Windows prior to 152.0.7977.65 allowed a remote attacker who had compromised the renderer process to bypass web origin policy via a crafted HTML page. (Chromium security severity: Low)

Why

The product receives input or data, but it does not validate or incorrectly validates that the input has the properties that are required to process the data safely and correctly.

How

An attacker operating through a network path may attempt exploitation without authentication after a user interaction. If successful, the issue may cause the confidentiality, integrity or availability impact described by the vendor.

02

Exploit reality and attack path

CVSS severity, EPSS forecast probability, public exploit material and CISA-confirmed exploitation are separate signals.

Observed exploitation
?Confirmed exploitation and public exploit material are separate signals. Attacks can occur without public proof-of-concept or exploit code.
No confirmed evidence

No CISA KEV match was present at the last successful refresh. This means no confirmation from that source, not proof of no exploitation.

Public PoC / exploit material
?Confirmed exploitation and public exploit material are separate signals. Attacks can occur without public proof-of-concept or exploit code.
None recorded

No exploit-tagged reference or CISA SSVC proof-of-concept state is currently recorded. Research may still exist outside the structured feeds.

Likely attack path
a network path → Improper Input Validation → cause the confidentiality, integrity or availability impact described by the vendor
Attack surface
Network
Privileges required
None: unauthenticated exploitation is possible
User interaction
Required interaction required
Attack complexity
Low: no specialised conditions are recorded
Security boundary
Unchanged: impact remains within the vulnerable component's security authority
Weakness
?CWE means Common Weakness Enumeration: a standard category for the underlying weakness.
CWE-20 ↗

CWE-20: Improper Input Validation. The product receives input or data, but it does not validate or incorrectly validates that the input has the properties that are required to process the data safely and correctly.

CVSS vector
?CVSS means Common Vulnerability Scoring System. The vector records the metric values used to calculate technical severity.
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N

Common Vulnerability Scoring System 3.1: the compact vector below is decoded into plain language.

AVNetworkAttack vector: The vulnerable component can be reached over a network.ACLowAttack complexity: No specialised conditions are required beyond attacker-controlled input.PRNonePrivileges required: The attacker does not need an account or existing privileges.UIRequiredUser interaction: Another user must perform an action for exploitation to succeed.SUnchangedScope: The security impact remains within the vulnerable component's authority.CNoneConfidentiality impact: No direct loss is represented by this metric.IHighIntegrity impact: A successful attack can cause a major loss.ANoneAvailability impact: No direct loss is represented by this metric.
Post-exploitation / living off the land
No specific living-off-the-land technique is confirmed in the structured sources. Monitor normal administration tools for activity inconsistent with the affected service's baseline.
NetworkUnauthenticatedCWE-20
A

Official authority intelligence

Only matched European and national findings are included. Language selectors and unavailable sources are omitted.

ENISA EUVD · EUVD-2026-66044Official EUVD mapping

Improper input validation in ReadingList in Google Chrome on on Windows prior to 152.0.7977.65 allowed a remote attacker who had compromised the renderer process to bypass web origin policy via a crafted HTML page. (Chromium security severity: Low)

Official EUVD record
BSI · German · WID-SEC-W-2026-3013Google Chrome: Mehrere Schwachstellen

Ein Angreifer kann mehrere Schwachstellen in Google Chrome ausnutzen, um beliebigen Programmcode auszuführen, Berechtigungen zu erweitern, Sicherheitsmaßnahmen zu umgehen, sensible Informationen offenzulegen, Spoofing-Angriffe durchzuführen, Daten zu manipulieren oder Denial-of-Service-Zustände zu verursachen.

Official advisory
CERT-FR · French · CERTFR-2026-AVI-1096Multiples vulnérabilités dans Microsoft Edge

août 2026 Bulletin de sécurité Microsoft Edge CVE-2026-79232 du 28 août 2026 Bulletin de sécurité Microsoft Edge CVE-2026-79234 du 28 août 2026 Bulletin de sécurité Microsoft Edge CVE-2026-79235 du 28 août 2026 Bulletin de sécurité Microsoft Edge CVE-2026-79236 du 28 août 2026 Bulletin de sécurité Microsoft Edge CVE-2026-79237 du 28 août 2026 Bulletin de sécurité Microsoft Edge CVE-2026-79238 du 28 août 2026 Bulletin de sécurité Microsoft Edge CVE-2026-79239 du 28 août 2026 Bulletin de sécurité Microsoft Edge CVE-2026-79240 du 28 août 2026 Bulletin de sécurité Microsoft Edge CVE-2026-79242 du 28 août 2026 Bulletin de sécurité Microsoft Edge CVE-2026-79243 du 28 août 2026 Bulletin de sécurité Microsoft Edge CVE-2026-79244 du 28 août 2026 Bulletin de sécurité Microsoft Edge CVE-2026-79245 du 28 août 2026 Bulletin de sécurité Microsoft Edge CVE-2026-79246 du 28 août 2026 Bulletin de sécurité Microsoft Edge CVE-2026-79247 du 28 août 2026 Bulletin de sécurité Microsoft Edge CVE-2026-79248 du 28 août 2026 Bulletin de sécurité Microsoft Edge CVE-2026-79249 du 28 août 2026 Bulletin de sécurité Microsoft Edge CVE-2026-79250 du 28 août 2026 Bulletin de sécurité Microsoft Edge CVE-2026-79251 du 28 août 2026 Bulletin de sécurité Microsoft Edge CVE-2026-79252 du 28 août 2026 Bulletin de sécurité Microsoft

Official advisory
CERT-FR · French · CERTFR-2026-AVI-1081Multiples vulnérabilités dans Google Chrome

d?id=CVE-2026-79234 Référence CVE CVE-2026-79235 https://www.cve.org/CVERecord?id=CVE-2026-79235 Référence CVE CVE-2026-79236 https://www.cve.org/CVERecord?id=CVE-2026-79236 Référence CVE CVE-2026-79237 https://www.cve.org/CVERecord?id=CVE-2026-79237 Référence CVE CVE-2026-79238 https://www.cve.org/CVERecord?id=CVE-2026-79238 Référence CVE CVE-2026-79239 https://www.cve.org/CVERecord?id=CVE-2026-79239 Référence CVE CVE-2026-79240 https://www.cve.org/CVERecord?id=CVE-2026-79240 Référence CVE CVE-2026-79241 https://www.cve.org/CVERecord?id=CVE-2026-79241 Référence CVE CVE-2026-79242 https://www.cve.org/CVERecord?id=CVE-2026-79242 Référence CVE CVE-2026-79243 https://www.cve.org/CVERecord?id=CVE-2026-79243 Référence CVE CVE-2026-79244 https://www.cve.org/CVERecord?id=CVE-2026-79244 Référence CVE CVE-2026-79245 https://www.cve.org/CVERecord?id=CVE-2026-79245 Référence CVE CVE-2026-79246 https://www.cve.org/CVERecord?id=CVE-2026-79246 Référence CVE CVE-2026-79247 https://www.cve.org/CVERecord?id=CVE-2026-79247 Référence CVE CVE-2026-79248 https://www.cve.org/CVERecord?id=CVE-2026-79248 Référence CVE CVE-2026-79249 https://www.cve.org/CVERecord?id=CVE-2026-79249 Référence CVE CVE-2026-79250 https://www.cve.org/CVERecord?id=CVE-2026-79250 Référence CVE CVE-2026-79251 https://www.cve.org/CVERecord?id=

Official advisory
03

Patch and workaround

Operational remediation based on structured source evidence.

Status
?Patch availability is based on structured fixed-version fields and authoritative update references. If no fix is verified, check the vendor advisory before making a change.
Fix not verified
Affected
152.0.7977.65 < 152.0.7977.65
Fixed
No fixed version is explicitly recorded in the structured CVE data.
Action
No verified patch reference is present in the current structured sources. Check the vendor advisory before making a change.
Workaround
No verified workaround is recorded. If business-safe, reduce exposure to the affected interface and allow only trusted sources until authoritative guidance is available.
04

Evidence and provenance

Published 25 Aug 2026 · Last source change 26 Aug 2026, 19:21 UTC · CWE-20 · Improper Input Validation

CVE recordCVE.org · 5.2
CVSS sourceCISA ADP
EPSS source
?The date BlackTree first stored a score for this CVE from the daily FIRST EPSS feed.
FIRST · tracked since 2026-08-26
European sourceENISA EUVD · EUVD-2026-66044
Product sourceCNA
Remediation sourceCVE/CNA references
CWE sourceCNA
NVD statusNVD enriched

Core structured fields are present and their contributing authorities are shown above.

Material change intelligence

What changed after publication

View recent updates →
  1. Vendor guidanceAuthoritative vendor guidance changed from no authoritative guidance recorded to vendor advisory.
    Before
    no authoritative guidance recorded
    After
    vendor advisory
    chrome-cve-admin@google.com ↗
  2. SeveritySeverity changed from Unknown to Medium.
    Before
    Unknown
    After
    Medium
    CISA ADP ↗
  3. CVSS scoreCVSS score changed from not recorded to 6.5 (CVSS 3.1 · CISA ADP · CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N).
    Before
    not recorded
    After
    6.5 (CVSS 3.1 · CISA ADP · CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N)
    CISA ADP ↗
  4. ENISA EUVD mappingEUVD-2026-66044 was added to the official ENISA EUVD mapping for this CVE.
    Before
    not recorded
    After
    {"euvdId":"EUVD-2026-66044"}
    ENISA EUVD ↗
  5. Catalogue recordCVE added to the BlackTree catalogue.
    CNA ↗
Material fields only · duplicate refreshes suppressed · history retained for the configured operational retention period
CVE published
ENISA EUVD · EUVD-2026-66044↗Vendor CSAF · Red Hat Product Security↗CVE authority or vendor reference↗Official CVE record (CNA and ADP data)↗NVD record↗
Technical terms and abbreviations used in this report
CVE
Common Vulnerabilities and Exposures: the public identifier for one disclosed vulnerability.
CVSS
Common Vulnerability Scoring System: a technical severity framework; it is not patching priority by itself.
EPSS
Exploit Prediction Scoring System: FIRST's estimate of the probability that exploitation activity will be observed in the next 30 days; it is a forecast, not confirmation.
CWE
Common Weakness Enumeration: the standard category describing the underlying software or hardware weakness.
CNA
CVE Numbering Authority: an organisation authorised to assign and publish CVE records.
CISA ADP
Cybersecurity and Infrastructure Security Agency Authorized Data Publisher: structured enrichment added to a CVE record.
NVD
National Vulnerability Database: NIST's enrichment service for CVE records.
CERT / CSIRT
A computer security incident response team that publishes warnings or coordinates incident response.
PoC
Proof of concept: public material that demonstrates or helps reproduce exploitation.
CSAF
Common Security Advisory Framework: a machine-readable format for security advisories.
LoTL
Living off the land: abuse of legitimate tools or system functions during an attack.
Free version - for non-commercial use only.CVE-2026-79243 · cve.blacktree.nl