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TI-2026-23127 Aliases CVE-2026-28946GHSA-ch66-7v2f-mvh2

Use after free in Apple Safari

Priority LOW 29CWE-416Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
Required
Attack complexity
Low
Impact type
Denial of service
Confidentiality · integrity · availability
None · None · High
Fix status
Partial Red Hat: 13 fixed, 1 without a fix

Attack profile from CVSS 3.1 · CISA ADP. Fix status from CNA and Red Hat. Impact type from CWE-416 and the CVSS impact.

Summary

A use-after-free issue was addressed with improved memory management. This issue is fixed in Safari 26.5, macOS Tahoe 26.5. Processing maliciously crafted web content may lead to an unexpected Safari crash.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00393 33rd percentileScored 2026-11-07
Fix Partial Safari (Apple): 26.5macOS (Apple): 26.5Red Hat: 9 advisoriesRed Hat: 13 fixed, 1 without a fix

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
No
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
AppleSafaribefore 26.526.5Patch availableCNA
ApplemacOSbefore 26.526.5Patch availableCNA
  • Safari VendorApple Affected before 26.5 Fixed in 26.5 Patch available CNA
  • macOS VendorApple Affected before 26.5 Fixed in 26.5 Patch available CNA

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:o:apple:macos:*:*:*:*:*:*:*:*26.0 to before 26.5VulnerableApple
  • cpe:2.3:o:apple:macos:*:*:*:*:*:*:*:* Versions 26.0 to before 26.5 Vulnerable ·Apple

Remediation

  • Fix · CNA Safari (Apple) Fixed in 26.5
  • Fix · CNA macOS (Apple) Fixed in 26.5

Red Hat 9 advisories

  • RHSA-2026:28147 Released 2026-06-25 · Red Hat rating Important
    webkit2gtk3 security update
    • Red Hat Enterprise Linux AppStream EUS (v.9.6) webkit2gtk3-2.52.4-1.el9_6, webkit2gtk3-devel-2.52.4-1.el9_6, webkit2gtk3-jsc-2.52.4-1.el9_6 +1
  • RHSA-2026:28146 Released 2026-06-23 · Red Hat rating Important
    webkit2gtk3 security update
    • Red Hat Enterprise Linux AppStream E4S (v.9.4) webkit2gtk3-2.52.4-1.el9_4, webkit2gtk3-devel-2.52.4-1.el9_4, webkit2gtk3-jsc-2.52.4-1.el9_4 +1
  • RHSA-2026:28148 Released 2026-06-23 · Red Hat rating Important
    webkit2gtk3 security update
    • Red Hat Enterprise Linux AppStream E4S (v.9.2) webkit2gtk3-2.52.4-1.el9_2, webkit2gtk3-devel-2.52.4-1.el9_2, webkit2gtk3-jsc-2.52.4-1.el9_2 +1
Show 6 more Red Hat advisories
  • RHSA-2026:28114 Released 2026-06-23 · Red Hat rating Important
    webkit2gtk3 security update
    • Red Hat Enterprise Linux AppStream AUS (v.8.6) webkit2gtk3-2.52.4-1.el8_6, webkit2gtk3-devel-2.52.4-1.el8_6, webkit2gtk3-jsc-2.52.4-1.el8_6 +1
    • Red Hat Enterprise Linux AppStream EUS EXTENSION (v.8.6) webkit2gtk3-2.52.4-1.el8_6, webkit2gtk3-devel-2.52.4-1.el8_6, webkit2gtk3-jsc-2.52.4-1.el8_6 +1
  • RHSA-2026:27804 Released 2026-06-22 · Red Hat rating Important
    webkit2gtk3 security update
    • Red Hat Enterprise Linux AppStream E4S (v.8.8) webkit2gtk3-2.52.4-1.el8_8, webkit2gtk3-devel-2.52.4-1.el8_8, webkit2gtk3-jsc-2.52.4-1.el8_8 +1
    • Red Hat Enterprise Linux AppStream TUS (v.8.8) webkit2gtk3-2.52.4-1.el8_8, webkit2gtk3-devel-2.52.4-1.el8_8, webkit2gtk3-jsc-2.52.4-1.el8_8 +1
  • RHSA-2026:27785 Released 2026-06-22 · Red Hat rating Important
    webkit2gtk3 security update
    • Red Hat Enterprise Linux AppStream AUS (v.8.4) webkit2gtk3-2.52.4-1.el8_4, webkit2gtk3-devel-2.52.4-1.el8_4, webkit2gtk3-jsc-2.52.4-1.el8_4 +1
    • Red Hat Enterprise Linux AppStream EUS EXTENSION (v.8.4) webkit2gtk3-2.52.4-1.el8_4, webkit2gtk3-devel-2.52.4-1.el8_4, webkit2gtk3-jsc-2.52.4-1.el8_4 +1
  • RHSA-2026:27728 Released 2026-06-22 · Red Hat rating Important
    webkitgtk4 security update
    • Red Hat Enterprise Linux Server (v. 7 ELS) webkitgtk4-2.52.4-1.el7_9, webkitgtk4-devel-2.52.4-1.el7_9, webkitgtk4-jsc-2.52.4-1.el7_9 +1
    • Red Hat Enterprise Linux Server Optional (v. 7 ELS) webkitgtk4-devel-2.52.4-1.el7_9, webkitgtk4-doc-2.52.4-1.el7_9, webkitgtk4-jsc-devel-2.52.4-1.el7_9
  • RHSA-2026:25927 Released 2026-06-15 · Red Hat rating Important
    webkit2gtk3 security update
    • Red Hat Enterprise Linux AppStream (v. 9) webkit2gtk3-2.52.4-1.el9_8, webkit2gtk3-devel-2.52.4-1.el9_8, webkit2gtk3-jsc-2.52.4-1.el9_8 +1
  • RHSA-2026:25918 Released 2026-06-15 · Red Hat rating Important
    webkit2gtk3 security update
    • Red Hat Enterprise Linux AppStream (v. 8) webkit2gtk3-2.52.4-1.el8_10, webkit2gtk3-devel-2.52.4-1.el8_10, webkit2gtk3-jsc-2.52.4-1.el8_10 +1

Fixed in the same release

Records fixed by the same vendor advisory or release, as the CNA lists them.

  • Release ·

    Apple macOS 26.5

    27 records Highest priority Priority MEDIUM 3 MEDIUM, 24 LOW

    Other records, highest priority first

    Show all 27 records →
  • Release ·

    Apple Safari 26.5

    21 records Highest priority Priority MEDIUM 3 MEDIUM, 18 LOW

    Other records, highest priority first

    Show all 21 records →

Vendor assessments

Red Hat

Red Hat rating: Important. Red Hat's page for this CVE →

ProductStatusPlan or fix
Red Hat Enterprise Linux 6AffectedNo fix planned: Out of support scope
Red Hat Enterprise Linux AppStream (v. 8)Fixed RHSA-2026:25918
Red Hat Enterprise Linux AppStream (v. 9)Fixed RHSA-2026:25927
Red Hat Enterprise Linux AppStream AUS (v.8.4)Fixed RHSA-2026:27785
Red Hat Enterprise Linux AppStream AUS (v.8.6)Fixed RHSA-2026:28114
Red Hat Enterprise Linux AppStream E4S (v.8.8)Fixed RHSA-2026:27804
Red Hat Enterprise Linux AppStream E4S (v.9.2)Fixed RHSA-2026:28148
Red Hat Enterprise Linux AppStream E4S (v.9.4)Fixed RHSA-2026:28146
Red Hat Enterprise Linux AppStream EUS (v.9.6)Fixed RHSA-2026:28147
Red Hat Enterprise Linux AppStream EUS EXTENSION (v.8.4)Fixed RHSA-2026:27785
Red Hat Enterprise Linux AppStream EUS EXTENSION (v.8.6)Fixed RHSA-2026:28114
Red Hat Enterprise Linux AppStream TUS (v.8.8)Fixed RHSA-2026:27804
Red Hat Enterprise Linux Server (v. 7 ELS)Fixed RHSA-2026:27728
Red Hat Enterprise Linux Server Optional (v. 7 ELS)Fixed RHSA-2026:27728
Not affected: 1 product
  • Red Hat Enterprise Linux 7

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-28946
  2. 2026-10-03 Alias added: GHSA-ch66-7v2f-mvh2

References

Advisory 1

Other 1

  • TI-2026-46583 Improper authentication in Apple macOS KEVCVSS 3.1CRITICAL 9.8
  • TI-2025-28008 Out-of-bounds write in Apple iOS and iPadOS KEVCVSS 3.1CRITICAL 10.0
  • TI-2025-22441 Apple iOS and iPadOS: An attacker with arbitrary read and write capability may be able to… KEVCVSS 3.1CRITICAL 9.8
  • TI-2025-22440 Memory corruption in Apple iOS and iPadOS KEVCVSS 3.1CRITICAL 9.8
  • TI-2025-17951 Out-of-bounds write in Apple Safari KEVCVSS 3.1CRITICAL 10.0
  • TI-2025-17847 Use after free in Apple iOS and iPadOS KEVCVSS 3.1CRITICAL 10.0
See all 3490 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences