CVE-2026-65333 Overview
CVE-2026-65333 is a state management vulnerability in Apple's Safari browser and related operating systems. Processing maliciously crafted web content can trigger an unexpected Safari crash on affected devices. Apple addressed the issue through improved state management in Safari 26.6.1, iOS 18.7.10, iPadOS 18.7.10, iOS 26.6.1, iPadOS 26.6.1, and macOS Tahoe 26.6.2. The flaw is categorized under [CWE-119], indicating improper restriction of operations within the bounds of a memory buffer. The vulnerability requires user interaction and results in an availability impact only, without direct confidentiality or integrity consequences.
Critical Impact
A remote attacker can crash the Safari browser by luring a user to visit maliciously crafted web content, disrupting browsing sessions on Apple devices.
Affected Products
- Apple iPadOS (fixed in 18.7.10 and 26.6.1)
- Apple iOS (fixed in 18.7.10 and 26.6.1)
- Apple macOS (fixed in macOS Tahoe 26.6.2, Safari 26.6.1)
Discovery Timeline
- 2026-08-17 - CVE-2026-65333 published to NVD
- 2026-08-18 - Last updated in NVD database
Technical Details for CVE-2026-65333
Vulnerability Analysis
The vulnerability resides in Safari's handling of web content and is triggered when the browser processes a maliciously crafted page. Apple's advisory attributes the fix to improved state management, indicating that Safari previously mishandled internal state transitions during content parsing or rendering. The result is an unexpected process termination, disrupting the user's browsing session. The issue is remotely reachable over the network but requires user interaction, as the target must load attacker-controlled content. There is no confidentiality or integrity impact reported by the vendor, and no evidence indicates memory corruption is exploitable beyond a denial-of-service outcome.
Root Cause
The root cause is improper state management within Safari's content processing pipeline, classified under [CWE-119]. Apple has not released detailed technical specifics, but the state management fix suggests the browser reached an inconsistent internal state when handling certain sequences of web content operations, leading to a crash.
Attack Vector
An attacker hosts a malicious web page or embeds crafted content within an existing site. When a user opens the page in a vulnerable version of Safari, the browser processes the content and terminates unexpectedly. No authentication is required, and no elevated privileges are needed on the target system. See the Apple Support Article #148281, Apple Support Article #148282, Apple Support Article #148286, and Apple Support Article #148287 for vendor guidance.
No verified proof-of-concept code is publicly available. The vulnerability mechanism is described in prose because no vendor-published or verified exploit code exists.
Detection Methods for CVE-2026-65333
Indicators of Compromise
- Repeated, unexpected Safari process terminations on iOS, iPadOS, or macOS devices following visits to unfamiliar or attacker-linked URLs.
- Crash logs referencing WebKit or Safari content processes generated shortly after loading external web content.
- User reports of Safari closing immediately upon opening specific pages or embedded frames.
Detection Strategies
- Monitor endpoint telemetry for abnormal Safari and com.apple.WebKit process crashes correlated with recent URL activity.
- Review Apple device crash reports and MDM diagnostics for repeated WebKit terminations across users.
- Correlate web proxy logs with crash events to identify malicious URLs used to trigger the flaw.
Monitoring Recommendations
- Track Safari and WebKit version telemetry across the fleet to identify devices still running vulnerable builds.
- Alert on visits to newly registered or low-reputation domains preceding Safari crash events.
- Ingest macOS unified logs and iOS crash reports into a centralized data lake for retrospective analysis.
How to Mitigate CVE-2026-65333
Immediate Actions Required
- Update Safari to version 26.6.1 on macOS systems that support the standalone Safari update.
- Upgrade iOS and iPadOS devices to 18.7.10 or 26.6.1, whichever matches the device's supported major release.
- Upgrade eligible Macs to macOS Tahoe 26.6.2 to receive the bundled WebKit fix.
- Prioritize patching devices used to browse untrusted or user-supplied web content.
Patch Information
Apple has released fixes in Safari 26.6.1, iOS 18.7.10 and iPadOS 18.7.10, iOS 26.6.1 and iPadOS 26.6.1, and macOS Tahoe 26.6.2. Refer to Apple Support Article #148281, Apple Support Article #148282, and Apple Support Article #148287 for the full advisory details and download instructions.
Workarounds
- Restrict browsing on unpatched devices to trusted sites until the update is applied.
- Use enterprise MDM policies to enforce Safari and OS update compliance across managed Apple devices.
- Advise users to avoid clicking links from untrusted sources on vulnerable devices.
# Verify Safari version on macOS
defaults read /Applications/Safari.app/Contents/Info.plist CFBundleShortVersionString
# Check iOS/iPadOS version via MDM or Settings > General > About
# Ensure version is 18.7.10, 26.6.1, or later
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
