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SafariWeb browser · Apple

CVE-2026-20660

HIGH · 7.5 CVSS v3.1 Published 2026-02-11
Fix available
A fix is available. Upgrade to 14.8.4 / 18.7.5 or later.
See remediation →
84/100
Remediation priority · High
Remotely reachable No privileges Zero-click

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
A path handling issue was addressed with improved logic. 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 Sequoia 15.7.5, macOS Sonoma 14.8.4, macOS Tahoe 26.3, visionOS 26.3. A remote user may be able to write arbitrary files.

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 · moderate confidence

A path traversal vulnerability in Safari and Apple operating systems allows remote attackers to write arbitrary files to the filesystem by exploiting insufficient path validation logic. This client-side vulnerability can be triggered when a user visits a malicious webpage or interacts with crafted content.

MitigationApply the vendor-supplied updates: Safari 26.3, iOS 18.7.5/26.3, iPadOS 18.7.5/26.3, macOS Sequoia 15.7.5, Sonoma 14.8.4, Tahoe 26.3, and visionOS 26.3. Prioritize external-facing devices and users browsing untrusted content.

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
SafariWeb browser
Affected:< 26.3
IpadosOperating system
Affected:< 18.7.5>= 26.0, < 26.3
Iphone OsOperating system
Affected:< 18.7.5>= 26.0, < 26.3
macOSOperating system
Affected:< 14.8.4>= 26.0, < 26.3
VisionosOperating system
Affected:< 26.3

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
None
Scope
Unchanged
Confidentiality
None
Integrity
High
Availability
None

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

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. Check Safari version on macOS
    Open Safari, go to Safari > About Safari, or run: defaults read /Applications/Safari.app/Contents/Info CFBundleVersion in Terminal
    Affected if Version is less than 26.3 (e.g., 26.0-26.2 or earlier)
  2. Check macOS version
    Open System Settings > General > About, or run: sw_vers -productVersion in Terminal
    Affected if Version is less than 14.8.4, or falls between 26.0 and 26.2 (including 26.0-26.2)
  3. Check iOS version on iPhone
    Open Settings > General > About, or connect to Finder/iTunes to view iOS version
    Affected if Version is less than 18.7.5, or falls between 26.0 and 26.2
  4. Check iPadOS version on iPad
    Open Settings > General > About, or connect to Finder/iTunes to view iPadOS version
    Affected if Version is less than 18.7.5, or falls between 26.0 and 26.2
  5. Check visionOS version
    Open Settings > General > About on Apple Vision Pro
    Affected if Version is less than 26.3

If any installed Apple product (Safari, macOS, iOS, iPadOS, or visionOS) matches an affected version range, the system is vulnerable to this path traversal flaw.

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 14.8.4 / 18.7.5 / 26.3 or later
Fixed in 14.8.418.7.526.3
Interim mitigation

Apply the vendor-supplied updates: Safari 26.3, iOS 18.7.5/26.3, iPadOS 18.7.5/26.3, macOS Sequoia 15.7.5, Sonoma 14.8.4, Tahoe 26.3, and visionOS 26.3. Prioritize external-facing devices and users browsing untrusted content.

Recommended fix High confidence

Upgrade to Safari 26.3, iOS/iPadOS 18.7.5 or 26.3, macOS Sonoma 14.8.4/Sequoia 15.7.5/Tahoe 26.3, or visionOS 26.3 as appropriate

  1. Check the current version of the affected Apple software (Safari, iOS, iPadOS, macOS, or visionOS) via Settings > General > About or the system information menu
  2. For iOS/iPadOS: Go to Settings > General > Software Update and install the available update (iOS 18.7.5 or iOS 26.3/iPadOS 18.7.5 or iPadOS 26.3 depending on your current version)
  3. For macOS: Open System Settings > General > Software Update and install the available update (macOS Sonoma 14.8.4, macOS Sequoia 15.7.5, or macOS Tahoe 26.3 depending on your current version)
  4. For Safari: Update via macOS software update to Safari 26.3
  5. For visionOS: Go to Settings > General > Software Update and install visionOS 26.3
  6. After updating, verify the version number matches the fixed release to confirm the patch was applied
Caveat Standard OS update precautions apply - ensure backups exist before updating

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

Fix this in Safari Scoped from the published advisory
  • Consultation2.0 h
  • Implementation4.0 h
  • Testing2.0 h
  • Review / QA1.0 h
9.0 hours of engineering $1,600
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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-2026-20660 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