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CVE record · CVE-2026-20665

Protection mechanism failure in Apple Safari and others

CVSS 6.5 MediumEPSS 0.0063 · 50th percentile

Published by the CVE Program (CNA: apple) at 25 Mar 2026, 00:32 UTC. agentprime has not analysed this yet, so whether it affects any app is not known. This CVE names a vendor and product rather than a package, so the lockfile check doesn’t match it.

Affected products, as the CNA wrote them
VendorProductVersions
Apple Safari
  • affected before 26.4 custom
Apple iOS and iPadOS
  • affected before 18.7.7 custom
  • affected before 26.4 custom
Apple macOS
  • affected before 26.4 custom
Apple tvOS
  • affected before 26.4 custom
Apple visionOS
  • affected before 26.4 custom
Apple watchOS
  • affected before 26.4 custom
Identifiers
CVE-2026-20665
CNA
apple
Weakness (CWE)
CWE-693
Tags
Published
25 Mar 2026
Updated
26 Oct 2026

Not analysed yet

We haven’t published our own analysis of this CVE. If a person reviews it, this page will say what’s affected and what has to be true for it to matter.

Severity and exploitation

ScoreRatingCVSSVectorSource
6.5 Medium 3.1 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:L ADP (CISA-ADP)
  • CISA KEV Not listed.
  • EPSS 0.0063, the 50th percentile, on 6 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

Timeline

This record came from the full history of the CVE Program, published 25 Mar 2026. New records show when each source confirmed them.

Sources

References from the CNA

Facts on this page come from the CVE List as the CNA published them, with CVSS from the sources named above, CISA KEV and FIRST EPSS. Vendors, products and versions are shown as the CNA wrote them. We don’t reproduce the CVE’s description.