CVE-2023-32439

Exp

A type confusion issue was addressed with improved checks. This issue is fixed in iOS 16.5.1 and iPadOS 16.5.1, iOS 15.7.7 and iPadOS 15.7.7, macOS Ventura 13.4.1, Safari 16.5.1. Processing maliciously crafted web content may lead to arbitrary code execution. Apple is aware of a report that this issue may have been actively exploited.

Published: 2023-06-23 Last update: 2025-10-23 Assigner: [email protected] Source: [email protected]
NVD Status：Analyzed，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2023-32439 is rated Critical Active Threat (99.1/100): CVSS High severity, with high exploitation likelihood (EPSS 18.57%, 97th percentile). CISA KEV confirms active exploitation (added 2023-06-23) affecting Apple / Multiple Products. a weakness (CWE-843) Unauthenticated remote administrative access may be possible. EPSS rose +17.41% over the last day, indicating growing attacker interest. The CISA remediation deadline has passed—treat as an emergency patch priority.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

CISA KEV Record for CVE-2023-32439

Name: Apple Multiple Products WebKit Type Confusion Vulnerability · CISA KEV detail

Exploit added: 2023-06-23

Action due: 2023-07-14

Required action: Apply updates per vendor instructions.

Exploit prediction scoring system (EPSS) score for CVE-2023-32439

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2026-06-15 1.16% 18.57% +17.41%
2 2026-03-25 0.99% 1.16% +0.17%
3 2025-11-21 — 0.99% —

Full EPSS history (25 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2023-32439

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
8.8 3.1 HIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H Click to expand
Attack vector (AV:N)
Could be attacked over the internet or any normal routed network—not just someone sitting at the machine.
Attack complexity (AC:L)
Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:N)
No account or special rights needed—anonymous or random user is enough.
User interaction (UI:R)
A real person has to do something—click, install, enable—otherwise it doesn’t land.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:H)
Serious risk that confidential data gets exposed in a big way.
Integrity (I:H)
They could widely tamper with or forge data—trust in the data is badly hurt.
Availability (A:H)
Could take the service down hard or make it unusable for people who depend on it.
 2.8 5.9 [email protected]
8.8 3.1 HIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H Click to expand
Attack vector (AV:N)
Could be attacked over the internet or any normal routed network—not just someone sitting at the machine.
Attack complexity (AC:L)
Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:N)
No account or special rights needed—anonymous or random user is enough.
User interaction (UI:R)
A real person has to do something—click, install, enable—otherwise it doesn’t land.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:H)
Serious risk that confidential data gets exposed in a big way.
Integrity (I:H)
They could widely tamper with or forge data—trust in the data is badly hurt.
Availability (A:H)
Could take the service down hard or make it unusable for people who depend on it.
 2.8 5.9 134c704f-9b21-4f2e-91b3-4a467353bcc0

Weakness enumeration for CVE-2023-32439

OS Trackers for CVE-2023-32439

vendor priority summary link
debian not yet assigned CVE-2023-32439 not yet assigned priority: Debian including 2 source packages (webkit2gtk, wpewebkit), 10 status rows across 5 suites (bookworm, bullseye, forky, sid, trixie): resolved 8, open 2. https://security-tracker.debian.org/tracker/CVE-2023-32439
gentoo high CVE-2023-32439: 1 GLSA(s) (202401-04), 1 atom(s) (net-libs/webkit-gtk); latest impact high. https://bugs.gentoo.org/buglist.cgi?quicksearch=CVE-2023-32439
redhat high — https://access.redhat.com/security/cve/CVE-2023-32439
suse high CVE-2023-32439 severity important: SUSE including 137 source package names (WebKitGTK-4.0-lang-2.40.5-150400.4.45.3, WebKitGTK-4.0-lang-2.42.5-150600.10.35, …), 350 product×package rows across 42 product lines (SUSE CaaS Platform 4.0, SUSE Enterprise Storage 7.1, … (42 product lines)): Fixed 350. https://www.suse.com/security/cve/CVE-2023-32439/
ubuntu medium CVE-2023-32439 medium priority: Ubuntu including 5 source packages (qtwebkit-opensource-src, qtwebkit-source, webkit2gtk, webkitgtk, wpewebkit), 50 status rows across 10 suites (bionic, focal, jammy, kinetic, lunar, mantic, noble, trusty, upstream, xenial): ignored 23, DNE 19, released 5, needs-triage 3. https://ubuntu.com/security/CVE-2023-32439

Affected software / configurations for CVE-2023-32439

Vendor Product Version Raw CPE
apple safari < 16.5.1 cpe:2.3:a:apple:safari:*:*:*:*:*:*:*:*
apple ipados < 15.7.7 cpe:2.3:o:apple:ipados:*:*:*:*:*:*:*:*
apple ipados >= 16.0, < 16.5.1 cpe:2.3:o:apple:ipados:*:*:*:*:*:*:*:*
apple iphone_os < 15.7.7 cpe:2.3:o:apple:iphone_os:*:*:*:*:*:*:*:*
apple iphone_os >= 16.0, < 16.5.1 cpe:2.3:o:apple:iphone_os:*:*:*:*:*:*:*:*
apple macos >= 13.0, < 13.4.1 cpe:2.3:o:apple:macos:*:*:*:*:*:*:*:*
webkitgtk webkitgtk\+ < 2.42.3 cpe:2.3:a:webkitgtk:webkitgtk\+:*:*:*:*:*:*:*:*

References for CVE-2023-32439

cvelogic Threat Intelligence