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8.8
HIGH CVSS 3.1
CVE-2026-20635
Apple Safari Web Content Crash
Overview
Description

The issue was addressed with improved memory handling. This issue is fixed in Safari 26.3, iOS 18.7.5 and iPadOS 18.7.5, iOS 26.3 and iPadOS 26.3, macOS Tahoe 26.3, tvOS 26.3, visionOS 26.3, watchOS 26.3. Processing maliciously crafted web content may lead to an unexpected process crash.

Details
INFO

Published Date :

Feb. 11, 2026, 11:16 p.m.

Last Modified :

June 30, 2026, 3:17 a.m.

Remotely Exploit :

Yes !

Source :

[email protected]
Impact
Affected Products

The following products are affected by CVE-2026-20635 vulnerability. Even if cvefeed.io is aware of the exact versions of the products that are affected, the information is not represented in the table below.

ID Vendor Product Action
1 Apple macos
2 Apple iphone_os
3 Apple tvos
4 Apple watchos
5 Apple safari
6 Apple ipados
7 Apple safari
8 Apple macos
9 Apple watchos
10 Apple visionos
: Total Affected Vendor : 1 | Products : 10
Scoring
CVSS Scores
The Common Vulnerability Scoring System is a standardized framework for assessing the severity of vulnerabilities in software and systems. We collect and displays CVSS scores from various sources for each CVE.
Score Version Severity Vector Exploitability Score Impact Score Source
CVSS 134c704f-9b21-4f2e-91b3-4a467353bcc0
CVSS 3.1 MEDIUM 134c704f-9b21-4f2e-91b3-4a467353bcc0
CVSS 3.1 HIGH 0b0ca135-0b70-47e7-9f44-1890c2a1c46c
Solution
Update devices and Safari to the latest versions to fix memory handling issues.
  • Update watchOS to version 26.3.
  • Update tvOS to version 26.3.
  • Update macOS to version Tahoe 26.3.
  • Update iOS/iPadOS to version 18.7.5.
Public PoC/Exploit Available at Github

CVE-2026-20635 has a 1 public PoC/Exploit available at Github. Go to the Public Exploits tab to see the list.

References
References to Advisories, Solutions, and Tools

Here, you will find a curated list of external links that provide in-depth information, practical solutions, and valuable tools related to CVE-2026-20635.

URL Resource
https://support.apple.com/en-us/126346 Release Notes Vendor Advisory
https://support.apple.com/en-us/126347 Release Notes Vendor Advisory
https://support.apple.com/en-us/126348 Release Notes Vendor Advisory
https://support.apple.com/en-us/126351 Release Notes Vendor Advisory
https://support.apple.com/en-us/126352 Release Notes Vendor Advisory
https://support.apple.com/en-us/126353 Release Notes Vendor Advisory
https://support.apple.com/en-us/126354 Release Notes Vendor Advisory
https://access.redhat.com/errata/RHSA-2026:10702
https://access.redhat.com/errata/RHSA-2026:11329
https://access.redhat.com/errata/RHSA-2026:11814
https://access.redhat.com/errata/RHSA-2026:13845
https://access.redhat.com/errata/RHSA-2026:14659
https://access.redhat.com/errata/RHSA-2026:16056
https://access.redhat.com/errata/RHSA-2026:16695
https://access.redhat.com/errata/RHSA-2026:19206
https://access.redhat.com/errata/RHSA-2026:19535
https://access.redhat.com/errata/RHSA-2026:22136
https://access.redhat.com/errata/RHSA-2026:9692
https://access.redhat.com/security/cve/CVE-2026-20635
https://bugzilla.redhat.com/show_bug.cgi?id=2448790
https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-20635.json
CWE - Common Weakness Enumeration

While CVE identifies specific instances of vulnerabilities, CWE categorizes the common flaws or weaknesses that can lead to vulnerabilities. CVE-2026-20635 is associated with the following CWEs:

Common Attack Pattern Enumeration and Classification (CAPEC)

Common Attack Pattern Enumeration and Classification (CAPEC) stores attack patterns, which are descriptions of the common attributes and approaches employed by adversaries to exploit the CVE-2026-20635 weaknesses.

CAPEC-8: Buffer Overflow in an API Call Buffer Overflow in an API Call CAPEC-9: Buffer Overflow in Local Command-Line Utilities Buffer Overflow in Local Command-Line Utilities CAPEC-10: Buffer Overflow via Environment Variables Buffer Overflow via Environment Variables CAPEC-14: Client-side Injection-induced Buffer Overflow Client-side Injection-induced Buffer Overflow CAPEC-24: Filter Failure through Buffer Overflow Filter Failure through Buffer Overflow CAPEC-42: MIME Conversion MIME Conversion CAPEC-44: Overflow Binary Resource File Overflow Binary Resource File CAPEC-45: Buffer Overflow via Symbolic Links Buffer Overflow via Symbolic Links CAPEC-46: Overflow Variables and Tags Overflow Variables and Tags CAPEC-47: Buffer Overflow via Parameter Expansion Buffer Overflow via Parameter Expansion CAPEC-100: Overflow Buffers Overflow Buffers CAPEC-123: Buffer Manipulation Buffer Manipulation CAPEC-8: Buffer Overflow in an API Call Buffer Overflow in an API Call CAPEC-9: Buffer Overflow in Local Command-Line Utilities Buffer Overflow in Local Command-Line Utilities CAPEC-10: Buffer Overflow via Environment Variables Buffer Overflow via Environment Variables CAPEC-14: Client-side Injection-induced Buffer Overflow Client-side Injection-induced Buffer Overflow CAPEC-24: Filter Failure through Buffer Overflow Filter Failure through Buffer Overflow CAPEC-42: MIME Conversion MIME Conversion CAPEC-44: Overflow Binary Resource File Overflow Binary Resource File CAPEC-45: Buffer Overflow via Symbolic Links Buffer Overflow via Symbolic Links CAPEC-46: Overflow Variables and Tags Overflow Variables and Tags CAPEC-47: Buffer Overflow via Parameter Expansion Buffer Overflow via Parameter Expansion CAPEC-67: String Format Overflow in syslog() String Format Overflow in syslog() CAPEC-92: Forced Integer Overflow Forced Integer Overflow CAPEC-100: Overflow Buffers Overflow Buffers

We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).

Profile Photo
0xcrypto/apple-cves

None

Python

Updated: 3 months, 2 weeks ago
0 stars 0 fork 0 watcher
Born at : Jan. 26, 2026, 8:17 a.m. This repo has been linked 2857 different CVEs too.

Results are limited to the first 15 repositories due to potential performance issues.

The following list is the news that have been mention CVE-2026-20635 vulnerability anywhere in the article.

  • TheCyberThrone
Apple Patch Tuesday – February 2026

February 12, 2026Critical Security Updates Across iOS, macOS, and Apple EcosystemApple released a coordinated set of security updates on February 11, 2026, aligning with the global Patch Tuesday cycle ... Read more

Published Date: Feb 12, 2026 (4 months, 3 weeks ago)

Results are limited to the first 20 news articles due to potential performance issues.

The following table lists the changes that have been made to the CVE-2026-20635 vulnerability over time.

Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.

  • CVE Modified by [email protected]

    Apr. 02, 2026

    Action Type Old Value New Value
    Changed Description The issue was addressed with improved memory handling. This issue is fixed in watchOS 26.3, tvOS 26.3, macOS Tahoe 26.3, iOS 18.7.5 and iPadOS 18.7.5, visionOS 26.3, iOS 26.3 and iPadOS 26.3, Safari 26.3. Processing maliciously crafted web content may lead to an unexpected process crash. The issue was addressed with improved memory handling. This issue is fixed in Safari 26.3, iOS 18.7.5 and iPadOS 18.7.5, iOS 26.3 and iPadOS 26.3, macOS Tahoe 26.3, tvOS 26.3, visionOS 26.3, watchOS 26.3. Processing maliciously crafted web content may lead to an unexpected process crash.
  • Initial Analysis by [email protected]

    Feb. 12, 2026

    Action Type Old Value New Value
    Added CPE Configuration OR *cpe:2.3:o:apple:macos:*:*:*:*:*:*:*:* versions up to (excluding) 26.3 *cpe:2.3:o:apple:tvos:*:*:*:*:*:*:*:* versions up to (excluding) 26.3 *cpe:2.3:o:apple:visionos:*:*:*:*:*:*:*:* versions up to (excluding) 26.3 *cpe:2.3:o:apple:watchos:*:*:*:*:*:*:*:* versions up to (excluding) 26.3 *cpe:2.3:o:apple:ipados:*:*:*:*:*:*:*:* versions up to (excluding) 18.7.5 *cpe:2.3:o:apple:ipados:*:*:*:*:*:*:*:* versions from (including) 26.0 up to (excluding) 26.3 *cpe:2.3:o:apple:iphone_os:*:*:*:*:*:*:*:* versions up to (excluding) 18.7.5 *cpe:2.3:o:apple:iphone_os:*:*:*:*:*:*:*:* versions from (including) 26.0 up to (excluding) 26.3 *cpe:2.3:a:apple:safari:*:*:*:*:*:*:*:* versions up to (excluding) 26.3
    Added Reference Type Apple Inc.: https://support.apple.com/en-us/126346 Types: Release Notes, Vendor Advisory
    Added Reference Type Apple Inc.: https://support.apple.com/en-us/126347 Types: Release Notes, Vendor Advisory
    Added Reference Type Apple Inc.: https://support.apple.com/en-us/126348 Types: Release Notes, Vendor Advisory
    Added Reference Type Apple Inc.: https://support.apple.com/en-us/126351 Types: Release Notes, Vendor Advisory
    Added Reference Type Apple Inc.: https://support.apple.com/en-us/126352 Types: Release Notes, Vendor Advisory
    Added Reference Type Apple Inc.: https://support.apple.com/en-us/126353 Types: Release Notes, Vendor Advisory
    Added Reference Type Apple Inc.: https://support.apple.com/en-us/126354 Types: Release Notes, Vendor Advisory
  • CVE Modified by 134c704f-9b21-4f2e-91b3-4a467353bcc0

    Feb. 12, 2026

    Action Type Old Value New Value
    Added CVSS V3.1 AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L
    Added CWE CWE-119
  • New CVE Received by [email protected]

    Feb. 11, 2026

    Action Type Old Value New Value
    Added Description The issue was addressed with improved memory handling. This issue is fixed in watchOS 26.3, tvOS 26.3, macOS Tahoe 26.3, iOS 18.7.5 and iPadOS 18.7.5, visionOS 26.3, iOS 26.3 and iPadOS 26.3, Safari 26.3. Processing maliciously crafted web content may lead to an unexpected process crash.
    Added Reference https://support.apple.com/en-us/126346
    Added Reference https://support.apple.com/en-us/126347
    Added Reference https://support.apple.com/en-us/126348
    Added Reference https://support.apple.com/en-us/126351
    Added Reference https://support.apple.com/en-us/126352
    Added Reference https://support.apple.com/en-us/126353
    Added Reference https://support.apple.com/en-us/126354
EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days. Following chart shows the EPSS score history of the vulnerability.
CVSS
Vulnerability Scoring Details
Base CVSS Score: 8.8
Attack Vector
Attack Complexity
Privileges Required
User Interaction
Scope
Confidentiality Impact
Integrity Impact
Availability Impact