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Vulnerabilities

Security fix · CVE-2025-43526

This issue was addressed with improved URL validation.

Published Dec 17, 2025 · catalog updated Apr 2, 2026 · Apple Safari

Last checked Oct 30, 2026. A connected source was read within the last 7 days.

Check this week

CVE-2025-43526 is not in CISA KEV. FIRST estimates a 53.00% chance of exploitation in the next 30 days. Check whether you run Apple Safari.

Gaps on this record

  • No vendor fix or required action is stored. Compare the linked advisory before you change production.

Same product and reporting

Severity
Critical9.8
Known exploitation
Not in CISA/VulnCheck KEV
EPSS
53.00%
Remediation
Version ranges on file
Affected products
vendor Apple Safari 0 <26.2

This issue was addressed with improved URL validation. This issue is fixed in Safari 26.2, macOS Tahoe 26.2. On a Mac with Lockdown Mode enabled, web content opened via a file URL may be able to use Web APIs that should be restricted.

Are you affected?

Enter the version you run. The result uses only the ranges stored on this record.

The check returns affected, not affected, or incomplete. It does not guess a version that is missing from the record.

  • vendor Apple Safari 0 <26.20 <26.2

How to fix CVE-2025-43526

  • Upgrade

    CVE-2025-43526 lists a fix boundary at 26.2. Compare the installed build with that boundary before you change production.

  • Version check

    Seen in 0 <26.2

  • Official advisories

What to do

Three questions, each answered from this record only. Confirm the vendor advisory before you patch.

Should you patch?

CVE-2025-43526 is not in CISA KEV. FIRST estimates a 53.00% chance of exploitation in the next 30 days. Check whether you run Apple Safari.

Which versions are affected?

Compare what you have installed with Apple Safari 0 <26.2 0 <26.2. Compare the installed version with the linked vendor advisory before you change production.

What should an analyst verify?

No weakness class is stored. EPSS 53.00%. There is no CISA KEV listing. No Exploit-DB or Metasploit reference is linked. Use the source links for the original advisory.

Code

The project this record applies to. Exploit listings stay in References.

No public source repository is identified for this product.

Timeline

Detection, updates, and resolution for this record.

  1. Dec 17, 2025 · EUVD

    Detected

    This issue was addressed with improved URL validation. This issue is fixed in Safari 26.2, macOS Tahoe 26.2. On a Mac with Lockdown Mode enabled, web content opened via a file URL may be able to use Web APIs that should be restricted.

  2. Apr 2, 2026 · EUVD

    Updated

    This issue was addressed with improved URL validation. This issue is fixed in Safari 26.2, macOS Tahoe 26.2. On a Mac with Lockdown Mode enabled, web content opened via a file URL may be able to use Web APIs that should be restricted.

Sources

  • EUVDVulnerability recordEUVD-2025-203981

    This issue was addressed with improved URL validation. This issue is fixed in Safari 26.2, macOS Tahoe 26.2. On a Mac with Lockdown Mode enabled, web content opened via a file URL may be able to use Web APIs that should be restricted.

    euvd.enisa.europa.eu

References

Freshness

Last verified in this catalog Apr 2, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.

  • EUVDOct 30, 2026