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Full vulnerability report · 2026
CVE-2026-106386High confidence

Uninitialized resource in WebAudio in Google Chrome prior to 155.0.8059.39 allowed a remote attacker to read memory inside the sandbox via a crafted HTML page

Google · Chrome

6.5MediumCVSS 3.1
Recommended action
Within 7 days

Medium technical severity with public exploit material referenced by a structured source; prioritise exposed affected systems while verifying vendor guidance.

Fix not verified
R
Operational reassessment

Published severity in operational context

Open reassessment dashboard →
Published severityMediumOperational priority:High, raised one band.upgradedsince 7 Oct 2026

Evidence used

  • No CISA KEV confirmation is currently recorded.
  • A structured source references public exploit or proof-of-concept material.
  • EPSS is 0.24% for the current model date.

Compensating controls

  • Restrict the affected network interface to trusted sources where business-safe.
  • Increase monitoring for the attack path and post-exploitation behaviour described in the report.

Verification

  1. Confirm that the asset runs Google Chrome and falls inside the recorded affected range.
  2. Recheck the vendor advisory before scheduling a change because no verified fixed version is currently retained.
  3. Validate exposure, authentication requirements and compensating controls in the actual environment.
  4. Reopen this reassessment when CVSS, KEV, EPSS, exploit evidence or remediation changes.
Mitigation target: Within 30 daysRemediation target: Within 180 days

This automated reassessment organises public evidence. It does not know asset exposure, business impact or control effectiveness and does not replace CVSS or a human risk decision.

Distribution package intelligence

Release-specific package status

Debian findings are scoped to the named distribution, release and source package. An absent finding does not mean a package is unaffected.

4 package states
Repository candidate not checked

A published vendor fix does not prove that a matching update is enabled and installable on a particular asset. Confirm the local package candidate before scheduling remediation.

Distribution releaseSource packageVendor stateFixed versionEvidence
Debian trixietrixie · sourcechromiumAffected, no fix publishedDebian currently tracks this release as open.Not published in this feedDebian Security Tracker ↗Source updated 8 Oct 2026
Debian bookwormbookworm · sourcechromiumAffected, no fix publishedDebian currently tracks this release as open.Not published in this feedDebian Security Tracker ↗Source updated 8 Oct 2026
Debian forkyforky · sourcechromiumAffected, no fix publishedDebian currently tracks this release as open.Not published in this feedDebian Security Tracker ↗Source updated 8 Oct 2026
Debian sidsid · sourcechromiumAffected, no fix publishedDebian currently tracks this release as open.Not published in this feedDebian Security Tracker ↗Source updated 8 Oct 2026
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-2026-106386 · CSAF 2.0 · revision 3 · finalRed Hat Product Securitychromium-browser: Uninitialized resource in WebAudio
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 the WebAudio component of chromium-browser. An uninitialized resource allows a remote attacker to cause information disclosure by convincing a user to visit a specially crafted HTML page. Successful exploitation enables the attacker to read process memory inside the browser sandbox (an isolated execution environment).
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.

Choose official national sources for this report. Each advisory shows its original language. Your selection is remembered on this device and included in shared links.

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-2026-93578

No EUVD known-exploited evidence

Uninitialized resource in WebAudio in Google Chrome prior to 155.0.8059.39 allowed a remote attacker to read memory inside the sandbox via a crafted HTML page. (Chromium security severity: Medium)

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 actionWithin 7 days

Medium technical severity with public exploit material referenced by a structured source; prioritise exposed affected systems while verifying vendor guidance.

Fix not verified
01

What, why and how

Uninitialized resource in WebAudio in Google Chrome prior to 155.0.8059.39 allowed a remote attacker to read memory inside the sandbox via a crafted HTML page. (Chromium security severity: Medium)

What

Uninitialized resource in WebAudio in Google Chrome prior to 155.0.8059.39 allowed a remote attacker to read memory inside the sandbox via a crafted HTML page. (Chromium security severity: Medium)

Why

The product uses or accesses a resource that has not been initialized.

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

Uninitialized resource in WebAudio in Google Chrome prior to 155.0.8059.39 allowed a remote attacker to read memory inside the sandbox via a crafted HTML page. (Chromium security severity: Medium)

Why

The product uses or accesses a resource that has not been initialized.

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.
Reference recorded

CISA Vulnrichment records proof-of-concept exploitation in its SSVC data. BlackTree has not independently executed or validated exploit material.

Likely attack path
a network path → Use of Uninitialized Resource → 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-908 ↗

CWE-908: Use of Uninitialized Resource. The product uses or accesses a resource that has not been initialized.

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:H/I:N/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.CHighConfidentiality impact: A successful attack can cause a major loss.INoneIntegrity impact: No direct loss is represented by this metric.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-908Public exploit reference
A

Official authority intelligence

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

ENISA EUVD · EUVD-2026-93578Official EUVD mapping

Uninitialized resource in WebAudio in Google Chrome prior to 155.0.8059.39 allowed a remote attacker to read memory inside the sandbox via a crafted HTML page. (Chromium security severity: Medium)

Official EUVD record ↗
BSI · German · WID-SEC-2026-3761Google Chrome: Mehrere Schwachstellen

Ein Angreifer kann mehrere Schwachstellen in Google Chrome ausnutzen, um beliebigen Programmcode auszuführen, erweiterte Berechtigungen zu erlangen, Sicherheitsmaßnahmen zu umgehen, Daten zu manipulieren oder offenzulegen, einen Denial-of-Service-Zustand auszulösen oder andere, nicht näher spezifizierte Angriffe durchzuführen.

Official advisory ↗
CERT-FR · French · CERTFR-2026-AVI-1268Multiples vulnérabilités dans Google Chrome

377 Référence CVE CVE-2026-106378 https://www.cve.org/CVERecord?id=CVE-2026-106378 Référence CVE CVE-2026-106379 https://www.cve.org/CVERecord?id=CVE-2026-106379 Référence CVE CVE-2026-106380 https://www.cve.org/CVERecord?id=CVE-2026-106380 Référence CVE CVE-2026-106381 https://www.cve.org/CVERecord?id=CVE-2026-106381 Référence CVE CVE-2026-106382 https://www.cve.org/CVERecord?id=CVE-2026-106382 Référence CVE CVE-2026-106383 https://www.cve.org/CVERecord?id=CVE-2026-106383 Référence CVE CVE-2026-106384 https://www.cve.org/CVERecord?id=CVE-2026-106384 Référence CVE CVE-2026-106385 https://www.cve.org/CVERecord?id=CVE-2026-106385 Référence CVE CVE-2026-106386 https://www.cve.org/CVERecord?id=CVE-2026-106386 Référence CVE CVE-2026-106387 https://www.cve.org/CVERecord?id=CVE-2026-106387 Référence CVE CVE-2026-106388 https://www.cve.org/CVERecord?id=CVE-2026-106388 Référence CVE CVE-2026-106389 https://www.cve.org/CVERecord?id=CVE-2026-106389 Référence CVE CVE-2026-106390 https://www.cve.org/CVERecord?id=CVE-2026-106390 Référence CVE CVE-2026-106391 https://www.cve.org/CVERecord?id=CVE-2026-106391 Référence CVE CVE-2026-106392 https://www.cve.org/CVERecord?id=CVE-2026-106392 Référence CVE CVE-2026-106393 https://www.cve.org/CVERecord?id=CVE-2026-106393 Référence CVE CVE-2026-106394 https://www.cve.o

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
Chrome: 155.0.8059.39 < 155.0.8059.39
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 6 Oct 2026 · Last source change 7 Oct 2026, 14:05 UTC · CWE-908 · Use of Uninitialized Resource

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 2026-10-07
European sourceENISA EUVD · EUVD-2026-93578
Product sourceCNA
Remediation sourceCVE/CNA references
CWE sourceCNA
NVD statusNVD enrichment underway

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

Material change intelligence

What changed after publication

View recent updates ↗
  1. Public exploit evidencePublic exploit evidence changed from No public exploit to Public exploit reference.
    Before
    No public exploit
    After
    Public exploit reference
    CVE.org ↗
  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:H/I:N/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:H/I:N/A:N)
    CISA ADP ↗
  4. ENISA EUVD mappingEUVD-2026-93578 was added to the official ENISA EUVD mapping for this CVE.
    Before
    not recorded
    After
    {"euvdId":"EUVD-2026-93578"}
    ENISA EUVD ↗
  5. Vendor guidanceAuthoritative vendor guidance changed: removed patch: chromereleases.googleblog.com/stable-channel-update-for-desktop_086471744.html; removed remediation: chromereleases.googleblog.com/stable-channel-update-for-desktop_086471744.html.
    Before
    patch: chromereleases.googleblog.com/stable-channel-update-for-desktop_086471744.html · remediation: chromereleases.googleblog.com/stable-channel-update-for-desktop_086471744.html
    After
    no authoritative guidance recorded
    CNA ↗
  6. Affected versionsThe structured affected or fixed version information changed.
    Before
    Google Chrome desktop releases before the fixed versions in the linked Stable Channel advisory. · Fixed: Google has published a fixed Chrome Stable desktop release in the linked advisory.
    After
    Chrome: 155.0.8059.39 < 155.0.8059.39 · Fixed: No fixed version is explicitly recorded in the structured CVE data.
    CNA ↗
  7. Remediation statusRemediation status changed from Patch available to Awaiting fix.
    Before
    Patch available
    After
    Awaiting fix
    CNA ↗
  8. SeveritySeverity changed from Medium to Unknown.
    Before
    Medium
    After
    Unknown
    CVE.org ↗
  9. Catalogue recordCVE added to the BlackTree catalogue.
    Authoritative vendor advisory ↗
Material fields only · duplicate refreshes suppressed · history retained for the configured operational retention period
CVE published
ENISA EUVD · EUVD-2026-93578↗Vendor CSAF · Red Hat Product Security↗CISA Vulnrichment SSVC evidence↗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-2026-106386 · cve.blacktree.nl