Released June 29, 2026

CVE-2026-43707

CVSS 6.5 severity medium CWE-119 vector CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H

Overview

Impact:

Description: Processing maliciously crafted web content may lead to an unexpected process crash

Researchers: stratan (@5tratan) of Almamater Technologies, OpenAI Codex Security - Amy Burnett

Background

Attribute	Value
CVE	CVE-2026-43707
Bugzilla	315951
Component	WebKit
Bug Class	LogicError
Severity	medium
Advisory	Apple Advisory

Fix not public. The WebKit fix for this bug is embargoed or not yet disclosed. The bug ID is confirmed from the Apple advisory, but no public commit references it.

Root Cause Analysis

A memory corruption issue was addressed with improved memory handling.

Audit Directions

When auditing for this vulnerability, focus on: (1) similar patterns in the patched functions and nearby code, (2) missing or insufficient bounds checks on user-controlled input, (3) unvalidated type conversions and pointer arithmetic, (4) edge cases not exercised by tests, and (5) copy-paste variants of the vulnerable logic elsewhere.