Vulnerability

CVE-2023-42916

Medium· 6.5KEVCVSS6.5EPSS0%

.rules3/5

Apple Multiple Products WebKit Out-of-Bounds Read Vulnerability

Apple iOS, iPadOS, macOS, and Safari WebKit contain an out-of-bounds read vulnerability that may disclose sensitive information 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.

Threat signal

75/100

High

Severity

medium

CVSS

6.5

EPSS

Active

KEV

CISA KEV — actively exploited

901d overdue

AffectedApple — Multiple Products

Added to KEV

2023-12-04

Federal patch due (BOD 22-01)

2023-12-25

Required action (CISA verbatim)

Apply remediations or mitigations per vendor instructions or discontinue use of the product if remediation or mitigations are unavailable.

Vendor advisory + references

CISA description: “Apple iOS, iPadOS, macOS, and Safari WebKit contain an out-of-bounds read vulnerability that may disclose sensitive information 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.”

CVSS

v3.1Open in FIRST calculator →

6.5/ 10MEDIUMCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N

Attack VectorNetworkExploitable remotely over the internet — no local access needed.
Attack ComplexityLowNo special conditions — exploit works reliably.
Privileges RequiredNoneUnauthenticated — no credentials needed.
User InteractionRequiredRequires user action (click, file open, etc).
ScopeUnchangedImpact contained to the vulnerable component.
Confidentiality ImpactHighTotal disclosure of sensitive data.
Integrity ImpactNoneNo integrity impact.
Availability ImpactNoneNo availability impact.

EPSS

Exploit prediction · 30-day horizonFIRST.org →

0.05%

probability of exploitation in next 30 days

p16

higher than 16% of all CVEs

3-day trend↑ 0pp

Low exploitation likelihood — defer if no other signals fire.

Vendor VEX

No VEX statements published for CVE-2023-42916. Vendors publish VEX (Vulnerability Exploitability eXchange) to assert per-product whether a CVE is actually exploitable in their distribution.

SSVCAttend

Active exploitation with limited impact — coordinate patching

exploitation: active
automatable: no
impact: partial
mission: support

Lifecycle

2023-12-04Added to CISA KEVransomware: Unknown
2023-12-04Published
2023-12-25Federal patch due (BOD 22-01)
2024-01-22Vendor advisory · amazon-linuxALAS2-2024-2427 — ALAS2-2024-2427 (important): webkitgtk4
2026-06-12Last modified1 source

Entity graph

2 nodes · 1 edges · click to pivot

CVEActorVendor advisoryIOCNews

Vendor advisories

amazon-linuxALAS2-2024-2427ALAS2-2024-2427 (important): webkitgtk4

No source-event history recorded yet. New revisions will appear here as ingestors re-fetch this CVE.