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Full vulnerability report · 2023
CVE-2023-32435High confidence

Apple Multiple Products WebKit Memory Corruption Vulnerability

Apple · Multiple Products

8.8HighCVSS 3.1
Recommended action
Protect now

CISA confirms exploitation in the wild and lists 2023-07-14 as the remediation due date.

Fix not verified
Distribution package intelligence

Ubuntu vendor package status

Canonical’s release and source-package findings are shown separately from local repository availability.

1 package state
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.

Ubuntu releaseSource packageVendor stateFixed versionEvidence
Ubuntu 24.04 LTSnoble · standard archiveqtwebkit-opensource-srcUnder evaluationCanonical reports that the package might be affected and still needs evaluation or fixing.Not published in this feedCanonical record ↗Source updated 10 Sept 2026
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-2023-36679

CISA KEV mirrored by ENISA

A memory corruption issue was addressed with improved state management. This issue is fixed in macOS Ventura 13.3, Safari 16.4, iOS 16.4 and iPadOS 16.4, iOS 15.7.7 and iPadOS 15.7.7. Processing web content may lead to arbitrary code execution. Apple is aware of a report that this issue may have been actively exploited against versions of iOS released before iOS 15.7.

EUVD state
Present in the current official mapping
Known exploitation
Recorded by ENISA since 23 Jun 2023. Evidence sources: cisa_kev.
ENISA score
8.8 · CVSS 3.1
Advisory evidence
12 linked advisory records
Explicit mitigation evidence

Only statements that explicitly mention a fix, patch, update, workaround or mitigation are shown here.

  • csaf_redhat · RHSA-2023:4202Red Hat Security Advisory: webkit2gtk3 security update
  • csaf_suse · SUSE-SU-2023:3233-1Security update for webkit2gtk3
  • csaf_suse · SUSE-SU-2023:3237-1Security update for webkit2gtk3
  • csaf_suse · SUSE-SU-2023:3419-1Security update for webkit2gtk3
  • csaf_suse · SUSE-SU-2023:3300-1Security update for webkit2gtk3
  • csaf_redhat · RHSA-2023:4201Red Hat Security Advisory: webkit2gtk3 security update
  • csaf_redhat · RHSA-2025:10364Red Hat Security Advisory: webkitgtk4 security update
Recommended actionProtect now

CISA confirms exploitation in the wild and lists 2023-07-14 as the remediation due date.

Fix not verified
01

What, why and how

Apple iOS, iPadOS, macOS, and Safari WebKit contain a memory corruption vulnerability that leads to code execution when processing maliciously crafted web content. This vulnerability could impact HTML parsers that use WebKit, including but not limited to Apple Safari and non-Apple products which rely on WebKit for HTML processing.

What

Apple iOS, iPadOS, macOS, and Safari WebKit contain a memory corruption vulnerability that leads to code execution when processing maliciously crafted web content. This vulnerability could impact HTML parsers that use WebKit, including but not limited to Apple Safari and non-Apple products which rely on WebKit for HTML processing.

Why

A bounds error lets data be written beyond the intended memory region, potentially corrupting control data.

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

Apple iOS, iPadOS, macOS, and Safari WebKit contain a memory corruption vulnerability that leads to code execution when processing maliciously crafted web content. This vulnerability could impact HTML parsers that use WebKit, including but not limited to Apple Safari and non-Apple products which rely on WebKit for HTML processing.

Why

A bounds error lets data be written beyond the intended memory region, potentially corrupting control data.

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.
Confirmed in the wild

CISA added this CVE to its Known Exploited Vulnerabilities catalogue on 2023-06-23.

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 → Out-of-bounds Write → 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-787 ↗

CWE-787: Out-of-bounds Write. The product writes data past the end, or before the beginning, of the intended buffer.

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:H/A:H

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.IHighIntegrity impact: A successful attack can cause a major loss.AHighAvailability impact: A successful attack can cause a major loss.
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-787CISA KEV
A

Official authority intelligence

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

ENISA EUVD · EUVD-2023-36679Known-exploited evidence recorded

A memory corruption issue was addressed with improved state management. This issue is fixed in macOS Ventura 13.3, Safari 16.4, iOS 16.4 and iPadOS 16.4, iOS 15.7.7 and iPadOS 15.7.7. Processing web content may lead to arbitrary code execution. Apple is aware of a report that this issue may have been actively exploited against versions of iOS released before iOS 15.7.

Official EUVD record
BSI · German · WID-SEC-W-2023-1778Red Hat Enterprise Linux: Mehrere Schwachstellen ermöglichen Codeausführung

Ein entfernter, anonymer Angreifer kann mehrere Schwachstellen in Red Hat Enterprise Linux ausnutzen, um beliebigen Programmcode auszuführen.

Official advisory
BSI · German · WID-SEC-W-2023-1537Apple iOS: Mehrere Schwachstellen ermöglichen Ausführen von beliebigem Programmcode mit Administratorrechten

Ein entfernter, anonymer Angreifer kann mehrere Schwachstellen in Apple iOS und Apple iPadOS ausnutzen, um beliebigen Programmcode mit Administratorrechten auszuführen.

Official advisory
BSI · German · WID-SEC-W-2023-0778Apple iOS: Mehrere Schwachstellen

Ein entfernter, anonymer Angreifer kann mehrere Schwachstellen in Apple iOS und Apple iPadOS ausnutzen, um beliebigen Programmcode mit Administratorrechten auszuführen, beliebigen Programmcode auszuführen, seine Privilegien erweitern, Informationen offenzulegen, Dateien zu manipulieren, Sicherheitsvorkehrungen zu umgehen oder einen Denial of Service Zustand zu verursachen.

Official advisory
BSI · German · WID-SEC-W-2023-0777Apple macOS: Mehrere Schwachstellen

Ein entfernter, anonymer Angreifer kann mehrere Schwachstellen in Apple macOS ausnutzen, um beliebigen Programmcode mit Administratorrechten auszuführen, beliebigen Programmcode auszuführen, Informationen offenzulegen, seine Privilegien zu erweitern, Dateien zu manipulieren, einen Denial of Service Zustand herbeizuführen, Sicherheitsvorkehrungen zu umgehen oder sonstige Auswirkungen zu verursachen.

Official advisory
BSI · German · WID-SEC-W-2024-1591Juniper JUNOS: Mehrere Schwachstellen

Ein Angreifer kann mehrere Schwachstellen in Juniper JUNOS ausnutzen, um einen Denial of Service zu verursachen, Informationen offenzulegen, Privilegien zu erweitern und Sicherheitsmechanismen inklusive zu umgehen.

Official advisory
CERT-FR · French · CERTFR-2024-AVI-0575Multiples vulnérabilités dans les produits Juniper Networks

ERecord?id=CVE-2023-24329 Référence CVE CVE-2023-25690 https://www.cve.org/CVERecord?id=CVE-2023-25690 Référence CVE CVE-2023-2700 https://www.cve.org/CVERecord?id=CVE-2023-2700 Référence CVE CVE-2023-27522 https://www.cve.org/CVERecord?id=CVE-2023-27522 Référence CVE CVE-2023-2828 https://www.cve.org/CVERecord?id=CVE-2023-2828 Référence CVE CVE-2023-30630 https://www.cve.org/CVERecord?id=CVE-2023-30630 Référence CVE CVE-2023-3090 https://www.cve.org/CVERecord?id=CVE-2023-3090 Référence CVE CVE-2023-32067 https://www.cve.org/CVERecord?id=CVE-2023-32067 Référence CVE CVE-2023-32360 https://www.cve.org/CVERecord?id=CVE-2023-32360 Référence CVE CVE-2023-32435 https://www.cve.org/CVERecord?id=CVE-2023-32435 Référence CVE CVE-2023-32439 https://www.cve.org/CVERecord?id=CVE-2023-32439 Référence CVE CVE-2023-3341 https://www.cve.org/CVERecord?id=CVE-2023-3341 Référence CVE CVE-2023-3390 https://www.cve.org/CVERecord?id=CVE-2023-3390 Référence CVE CVE-2023-34058 https://www.cve.org/CVERecord?id=CVE-2023-34058 Référence CVE CVE-2023-34059 https://www.cve.org/CVERecord?id=CVE-2023-34059 Référence CVE CVE-2023-34969 https://www.cve.org/CVERecord?id=CVE-2023-34969 Référence CVE CVE-2023-35001 https://www.cve.org/CVERecord?id=CVE-2023-35001 Référence CVE CVE-2023-35788 https://www.cve.org/CVERecord?id=CVE-

Official advisory
CERT-FR · French · CERTFR-2023-AVI-0480Multiples vulnérabilités dans les produits Apple

De multiples vulnérabilités ont été découvertes dans les produits Apple . Elles permettent à un attaquant de provoquer une atteinte à la confidentialité des données, une exécution de code arbitraire à distance et un contournement de la politique de sécurité. L'éditeur indique que les vulnérabilités référencées CVE-2023-32434, CVE-2023-32435 et CVE-2023-32439 sont activement exploitées.

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
unspecified < 13.3; unspecified < 15.7; unspecified < 16.4
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 23 Jun 2023 · Last source change 21 Oct 2025, 23:05 UTC · CWE-787 · Out-of-bounds Write

CVE recordCVE.org · 5.1
CVSS sourceNIST NVD
EPSS source
?The date BlackTree first stored a score for this CVE from the daily FIRST EPSS feed.
FIRST · tracked since 2026-08-14
European sourceENISA EUVD · EUVD-2023-36679
Product sourceCNA
Remediation sourceCVE/CNA references
CWE sourceCISA ADP
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 →

No material field changes have been recorded since change tracking began. Routine source refreshes and cosmetic edits are intentionally excluded.

Material fields only · duplicate refreshes suppressed · history retained for the configured operational retention period
CVE published
Added to CISA KEV
ENISA EUVD · EUVD-2023-36679↗CISA KEV record↗CVE authority or vendor reference↗Vendor advisory↗Vendor advisory↗Vendor advisory↗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-2023-32435 · cve.blacktree.nl