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Full vulnerability report · 2026
CVE-2026-79261High confidence

Incorrect authorization in Controls in Google Chrome prior to 152.0.7977.65 allowed a remote attacker to bypass web origin policy via a crafted HTML page

Google · Chrome

4.3MediumCVSS 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
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-2026-66040

No EUVD known-exploited evidence

Incorrect authorization in Controls in Google Chrome prior to 152.0.7977.65 allowed a remote attacker 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
4.3 · 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

Incorrect authorization in Controls in Google Chrome prior to 152.0.7977.65 allowed a remote attacker to bypass web origin policy via a crafted HTML page. (Chromium security severity: Low)

What

Incorrect authorization in Controls in Google Chrome prior to 152.0.7977.65 allowed a remote attacker to bypass web origin policy via a crafted HTML page. (Chromium security severity: Low)

Why

The application performs an authorisation check, but it does not correctly enforce the required permission boundary.

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

Incorrect authorization in Controls in Google Chrome prior to 152.0.7977.65 allowed a remote attacker to bypass web origin policy via a crafted HTML page. (Chromium security severity: Low)

Why

The application performs an authorisation check, but it does not correctly enforce the required permission boundary.

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 → Incorrect Authorization → 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-863 ↗

CWE-863: Incorrect Authorization. The product performs an authorization check when an actor attempts to access a resource or perform an action, but it does not correctly perform the check.

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:L/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.ILowIntegrity impact: A successful attack can cause a limited 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-863
A

Official authority intelligence

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

ENISA EUVD · EUVD-2026-66040Official EUVD mapping

Incorrect authorization in Controls in Google Chrome prior to 152.0.7977.65 allowed a remote attacker 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-2026-79250 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 Edge CVE-2026-79253 du 28 août 2026 Bulletin de sécurité Microsoft Edge CVE-2026-79255 du 28 août 2026 Bulletin de sécurité Microsoft Edge CVE-2026-79257 du 28 août 2026 Bulletin de sécurité Microsoft Edge CVE-2026-79258 du 28 août 2026 Bulletin de sécurité Microsoft Edge CVE-2026-79259 du 28 août 2026 Bulletin de sécurité Microsoft Edge CVE-2026-79260 du 28 août 2026 Bulletin de sécurité Microsoft Edge CVE-2026-79261 du 28 août 2026 Bulletin de sécurité Microsoft Edge CVE-2026-79262 du 28 août 2026 Bulletin de sécurité Microsoft Edge CVE-2026-79263 du 28 août 2026 Bulletin de sécurité Microsoft Edge CVE-2026-79264 du 28 août 2026 Bulletin de sécurité Microsoft Edge CVE-2026-79265 du 28 août 2026 Bulletin de sécurité Microsoft Edge CVE-2026-79266 du 28 août 2026 Bulletin de sécurité Microsoft Edge CVE-2026-79267 du 28 août 2026 Bulletin de sécurité Microsoft Edge CVE-2026-79269 du 28 août 2026 Bulletin de sécurité Microsoft Edge CVE-2026-79270 du 28 août 2026 Bulletin de sécurité Microsoft Edge CVE-2026-79271 du 28 août 2026 Bulletin de sécurité Microsoft

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

d?id=CVE-2026-79252 Référence CVE CVE-2026-79253 https://www.cve.org/CVERecord?id=CVE-2026-79253 Référence CVE CVE-2026-79254 https://www.cve.org/CVERecord?id=CVE-2026-79254 Référence CVE CVE-2026-79255 https://www.cve.org/CVERecord?id=CVE-2026-79255 Référence CVE CVE-2026-79256 https://www.cve.org/CVERecord?id=CVE-2026-79256 Référence CVE CVE-2026-79257 https://www.cve.org/CVERecord?id=CVE-2026-79257 Référence CVE CVE-2026-79258 https://www.cve.org/CVERecord?id=CVE-2026-79258 Référence CVE CVE-2026-79259 https://www.cve.org/CVERecord?id=CVE-2026-79259 Référence CVE CVE-2026-79260 https://www.cve.org/CVERecord?id=CVE-2026-79260 Référence CVE CVE-2026-79261 https://www.cve.org/CVERecord?id=CVE-2026-79261 Référence CVE CVE-2026-79262 https://www.cve.org/CVERecord?id=CVE-2026-79262 Référence CVE CVE-2026-79263 https://www.cve.org/CVERecord?id=CVE-2026-79263 Référence CVE CVE-2026-79264 https://www.cve.org/CVERecord?id=CVE-2026-79264 Référence CVE CVE-2026-79265 https://www.cve.org/CVERecord?id=CVE-2026-79265 Référence CVE CVE-2026-79266 https://www.cve.org/CVERecord?id=CVE-2026-79266 Référence CVE CVE-2026-79267 https://www.cve.org/CVERecord?id=CVE-2026-79267 Référence CVE CVE-2026-79269 https://www.cve.org/CVERecord?id=CVE-2026-79269 Référence CVE CVE-2026-79270 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 27 Aug 2026, 15:30 UTC · CWE-863 · Incorrect Authorization

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-2026-66040
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 4.3 (CVSS 3.1 · CISA ADP · CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N).
    Before
    not recorded
    After
    4.3 (CVSS 3.1 · CISA ADP · CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N)
    CISA ADP ↗
  4. ENISA EUVD mappingEUVD-2026-66040 was added to the official ENISA EUVD mapping for this CVE.
    Before
    not recorded
    After
    {"euvdId":"EUVD-2026-66040"}
    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-2026-66040↗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-2026-79261 · cve.blacktree.nl