dbcve.org
Mac Os XOperating system · Apple

CVE-2022-26748

HIGH · 8.8 CVSS v3.1 Published 2022-05-26
Fix available
A fix is available. Upgrade to 10.15.7 / 11.6.6 or later.
See remediation →
95/100
Remediation priority · Urgent
Remotely reachable No privileges

Official description Straight from the sourceThe vendor's or NVD's own wording, published unedited. Authoritative, but often terse — it says what broke, rarely what to do.

NVD · unedited
An out-of-bounds write issue was addressed with improved input validation. This issue is fixed in Security Update 2022-004 Catalina, macOS Monterey 12.4, macOS Big Sur 11.6.6. Processing maliciously crafted web content may lead to arbitrary code execution.

Technical summary Written by usOur analysis, written from the advisory, the CVSS vector and the affected-version data. It adds context the advisory leaves out, and never invents facts that are not in the source.

dbcve analysis · high confidence

An out-of-bounds write vulnerability in macOS web content processing (likely WebKit) allows arbitrary code execution when processing maliciously crafted web content. The vulnerability was patched with improved input validation in macOS security updates.

MitigationApply the relevant macOS security update: Security Update 2022-004 for Catalina, macOS Monterey 12.4, or macOS Big Sur 11.6.6 depending on the affected system.

Verify against the referenced sources before acting — the references below are authoritative for this CVE, this summary is not.

Affected products & versions What the vendor confirmedThe version ranges the vendor confirmed as vulnerable. If your version sits inside a range here, treat yourself as exposed until you have upgraded.

NVD · CPE data
Mac Os XOperating system
Affected:< 10.15.7= 10.15.7
macOSOperating system
Affected:>= 11.0, < 11.6.6>= 12.0, < 12.4

CVSS breakdown How the score is builtThe industry scoring standard. It rates how the flaw is reached, what it takes to exploit, and what an attacker gains — the score is derived from those, not the other way round.

From the vector
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
Required
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High

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

Am I affected? How to checkSteps we derive from the advisory and the affected-version data, so you can decide whether this CVE reaches your setup. They are a guide, not a scan — your own configuration is the authority.

dbcve checks

Work through these to decide whether this CVE applies to you.

  1. Identify the installed macOS version
    Click the Apple menu, select About This Mac, or run 'sw_vers' in Terminal
    Affected if The version shown is 10.15.7 or earlier, 11.0 to 11.6.5, or 12.0 to 12.3
  2. Confirm WebKit-based browser or application is in use
    Check for Safari, or any application that embeds WebKit for web content rendering (common in macOS mail clients, third-party browsers, or productivity apps with web views)
    Affected if Any WebKit-based browser or application is used on an affected macOS version - the vulnerable code path executes when processing web content
  3. Verify the security update patch status
    Open System Preferences > Software Update, or run 'softwareupdate --list' in Terminal to check for available updates
    Affected if Security Update 2022-004 (Catalina), macOS Big Sur 11.6.6, or macOS Monterey 12.4 is not installed on the system

A system is affected if it runs macOS 10.15.7 or earlier, 11.0-11.6.5, or 12.0-12.3 and processes web content through any WebKit-based application without the corresponding security update installed.

Generated from the published advisory. Verify against your own configuration.

Check your environment

Paste your version and any relevant configuration and it will be compared against the affected criteria above. Do not include secrets or credentials.

AI-assisted, checked against the advisory. Informational, not a guarantee.

Remediation Closing itWhat it takes to close this. Where a vendor fix exists we point at it; where none exists we say so plainly, and can build one. Effort estimates are scoped from the advisory, not from your codebase.

dbcve · scoped
Upgrade available Upgrade to 10.15.7 / 11.6.6 / 12.4 or later
Fixed in 10.15.711.6.612.4
Interim mitigation

Apply the relevant macOS security update: Security Update 2022-004 for Catalina, macOS Monterey 12.4, or macOS Big Sur 11.6.6 depending on the affected system.

Recommended fix High confidence

macOS Big Sur 11.6.6+ or macOS Monterey 12.4+ or Security Update 2022-004 Catalina

  1. Check the current macOS version by clicking the Apple menu and selecting 'About This Mac'
  2. Back up important data using Time Machine or another backup method before updating
  3. For macOS Big Sur (11.x) users: Update to macOS Big Sur 11.6.6 or later via System Preferences > Software Update
  4. For macOS Monterey (12.0-12.3) users: Update to macOS Monterey 12.4 or later via System Preferences > Software Update
  5. For macOS Catalina (10.15.7 and earlier) users: Install Security Update 2022-004 Catalina via System Preferences > Software Update
  6. After updating, verify the fix by checking 'About This Mac' to confirm the installed version matches the fixed release
Caveat Major macOS updates may introduce compatibility issues with older applications; test critical software before deploying widely

Generated from the published advisory — verify against the referenced sources before acting.

Fix this in Mac Os X Scoped from the published advisory
  • Consultation2.0 h
  • Implementation3.0 h
  • Testing2.0 h
  • Review / QA1.0 h
8.0 hours of engineering $1,420
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Scan for this in your stack

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References Go to the primary sourcePrimary sources — vendor advisories, patches and trackers. Where our summary and a reference disagree, the reference wins.

Primary sources

Practitioner notes

Contributed

Peer-ranked notes from engineers who’ve handled CVE-2022-26748 in production — separate from our analysis above.

No notes yet

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What this is

A place for practitioners to share what actually worked: a mitigation you’ve tested, a configuration change, a version- or environment-specific caveat, or a link to a verified patch. The most useful notes rise to the top as peers upvote them, so the signal stays high.

What belongs here
  • Verified mitigations, workarounds, and config changes
  • Version or environment caveats, and links to real fixes
  • No weaponised exploit code, or anything meant to cause harm
  • No spam, self-promotion, credentials, or personal data