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VulnerabilityPublished Updated

CVE-2026-28861: Apple Safari · Cross-site Scripting

Affects Apple SafariSource CVE Database V5

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Not known to be exploited · CVSS 4.3 Medium : upgrade to 26.4 when convenient.

Data as of 30 Oct 2026, 12:04 UTC

CVSS 3.1 base score
4.3Medium
How severe the flaw is on the 0–10 CVSS scale.

Sources agree

CVSS scores by source
CISA-ADPCVSS 3.14.3
ADP (redhat-SADP)CVSS 3.14.3
EPSS
0.3% chance of exploitation in 30 days – higher than 25% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
Patch
Available – fixed in 26.4, 18.7.7
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:N

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 25 Mar 2026

  2. Detectable: no evidence on record.

    No public nuclei template indexed

  3. Weaponized: no evidence on record.

    No public exploit code indexed in Metasploit or Exploit-DB

  4. Exploited in the wild: no evidence on record.

    Not in CISA KEV and no source reports exploitation

  5. Observed by OffSeq Mirage: no evidence on record.

    No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 30 Oct 2026.

What to do

Upgrade Safari and macOS and visionOS to 26.4; iOS and iPadOS to 26.4 or 18.7.7.

Affected software

ProductAffectedFixed in
AppleSafariAffected
  • <26.4
Fixed in
  • 26.4
AppleiOS and iPadOSAffected
  • <26.4
Fixed in
  • 26.4
AppleiOS and iPadOSAffected
  • <18.7.7
Fixed in
  • 18.7.7
ApplemacOSAffected
  • <26.4
Fixed in
  • 26.4
ApplevisionOSAffected
  • <26.4
Fixed in
  • 26.4

AI-suggested

This issue is fixed in Safari 26.4, iOS 18.7.7, iPadOS 18.7.7, macOS Tahoe 26.4, and visionOS 26.4. Users and administrators should update affected Safari browsers and operating systems to these versions or later to remediate the vulnerability. No additional mitigation steps are indicated by the vendor advisory.

Description

A logic issue was addressed with improved state management. This issue is fixed in Safari 26.4, iOS 18.7.7 and iPadOS 18.7.7, iOS 26.4 and iPadOS 26.4, macOS Tahoe 26.4, visionOS 26.4. A malicious website may be able to access script message handlers intended for other origins.

References

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