Threats / Apple / CVE-2023-32439
CVE-2023-32439
· EUVD no mirror located
· GCVE no mirror located
Verified 2026-08-04
Apple Multiple Products vulnerability
Type confusion vulnerability in Apple WebKit affecting iOS, iPadOS, macOS, and Safari. Maliciously crafted web content can trigger code execution. Exploited in the wild.
Verdict
Today item — known-exploited.
A type confusion flaw in WebKit's HTML parsing allows remote code execution through specially crafted web content. The vulnerability is actively exploited in real-world attacks and affects multiple Apple platforms and third-party products using WebKit.
CISA KEV Yes · 2023-06-234EPSS 0.23788 (verify live)5CVSS 8.8 (CISA)3CISA SSVC Exploitation: active · Automatable: no · Impact: total3
01
Is it exploitable?
— the evidence, ranked above the scoreReported exploitation
7 independent public reports of in-the-wild exploitation are cataloged.Distinct reporting sources (vendor, incident response, government); open them for the underlying claims.
Exploited in the wild
Listed in the CISA Known Exploited Vulnerabilities catalog (added 2023-06-23).
Probability (EPSS)
EPSS 0.23788 — modeled likelihood of exploitation activity.EPSS is a daily-changing model output — open the source for today's value.
Severity / affected
CVSS 8.8 (CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H) · Affected: Apple, Multiple Products. Confirm exact fixed builds in the vendor advisory.CVSS — CISA-assigned via the ADP container (CVE.org), version 3.1; the CNA left no metrics, so CISA's own score is used ahead of NVD.
Weakness (CWE)
Mapped to CWE-843 Type Confusion — weakness family: Memory safety.CWE assignment from the public NVD record (may be stale); the weakness class drives how the flaw is exploited.
CISA SSVC (triage disposition)
Exploitation: active · Automatable: no · Technical Impact: totalCISA's own stakeholder-specific triage inputs, published in the CVE record (CISA Coordinator role). NOTE: this is CISA's three decision points; the final Act/Attend/Track decision also requires a Mission & Well-being input not published here, so no overall decision is asserted.
Currency of the record
CISA added this to its KEV catalog the same day the CVE record was published.KEV lag = CISA-KEV dateAdded − CVE.org datePublished; a floor on how long the known-exploited flaw sat in the public record before the federal catalog listed it. Severity/weakness here is CNA- or CISA-assigned (current at disclosure), independent of NVD's analysis backlog.
02
Who’s exploiting it?
— attribution turns risk into urgencyAttribution not established
No confirmed (advisory-backed) threat-actor attribution is established for this record. Absence of a named actor is not absence of compromise — see Coverage & confidence.
03
Why it matters
— the attack path, told twice: adversary, then board1
Front door — unauthenticated access narrative 1
Attacker
I craft malicious HTML content designed to trigger type confusion in WebKit's parsing logic.
Business
Users visiting attacker-controlled or compromised websites face arbitrary code execution on their devices.
2
Keys to the kingdom — privilege/identity takeover narrative 2
Attacker
I host the malicious content on a website or inject it into legitimate sites through compromised infrastructure.
Business
Apple's browser and OS ecosystem credibility is damaged as users experience device compromise through routine web browsing.
3
Lateral reach — past segmentation narrative 3
Attacker
I achieve code execution with the privileges of the Safari or WebKit process, enabling data theft or system compromise.
Business
Customer data, credentials, and device integrity are at risk, leading to potential regulatory exposure and support costs.
04
What to do
— defensible action- Remediate per the vendor advisory — confirm the fixed build for your version and verify exposure.1
Say it to the boardA vulnerability with this evidence profile is a defensible budget line, not a backlog ticket — fund the change against the proof above.
05