CVE-2026-20644: Processing maliciously crafted web content may lead to an unexpected process crash in Apple Safari
The issue was addressed with improved memory handling. 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 Tahoe 26.3, visionOS 26.3. Processing maliciously crafted web content may lead to an unexpected process crash.
AI Analysis
Technical Summary
This vulnerability (CVE-2026-20644) affects Apple Safari and related WebKitGTK+ components by causing an unexpected process crash when processing maliciously crafted web content due to improper memory handling. The issue is classified under multiple CWEs related to memory safety (CWE-119, CWE-416, CWE-787, CWE-120). The fix involves improved memory handling and is included in Safari 26.3, iOS 18.7.5, iPadOS 18.7.5, macOS Tahoe 26.3, and visionOS 26.3. Red Hat has released security advisories and patches for webkitgtk4 in their RHEL 7 Extended Life Cycle Support to address this and related vulnerabilities. The CVSS v3.1 base score is 6.5, reflecting a medium severity with network attack vector, low attack complexity, no privileges required, user interaction required, and impact limited to availability (denial of service via crash).
Potential Impact
Successful exploitation of this vulnerability can cause Safari or affected WebKitGTK+ processes to crash unexpectedly, resulting in denial of service. There is no indication of confidentiality or integrity impact. No known exploits are reported in the wild at this time.
Mitigation Recommendations
A fix is available and has been released by Apple in Safari 26.3 and corresponding OS versions (iOS 18.7.5, iPadOS 18.7.5, macOS Tahoe 26.3, visionOS 26.3). Red Hat has also provided patches for webkitgtk4 in RHEL 7 Extended Life Cycle Support. Users and administrators should apply these official updates to remediate the vulnerability. Patch status is confirmed by vendor advisories. No additional mitigation is required beyond applying these updates.
CVE-2026-20644: Processing maliciously crafted web content may lead to an unexpected process crash in Apple Safari
Description
The issue was addressed with improved memory handling. 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 Tahoe 26.3, visionOS 26.3. Processing maliciously crafted web content may lead to an unexpected process crash.
CVSS v3.1
Score 6.5medium
Affected software
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability (CVE-2026-20644) affects Apple Safari and related WebKitGTK+ components by causing an unexpected process crash when processing maliciously crafted web content due to improper memory handling. The issue is classified under multiple CWEs related to memory safety (CWE-119, CWE-416, CWE-787, CWE-120). The fix involves improved memory handling and is included in Safari 26.3, iOS 18.7.5, iPadOS 18.7.5, macOS Tahoe 26.3, and visionOS 26.3. Red Hat has released security advisories and patches for webkitgtk4 in their RHEL 7 Extended Life Cycle Support to address this and related vulnerabilities. The CVSS v3.1 base score is 6.5, reflecting a medium severity with network attack vector, low attack complexity, no privileges required, user interaction required, and impact limited to availability (denial of service via crash).
Potential Impact
Successful exploitation of this vulnerability can cause Safari or affected WebKitGTK+ processes to crash unexpectedly, resulting in denial of service. There is no indication of confidentiality or integrity impact. No known exploits are reported in the wild at this time.
Mitigation Recommendations
A fix is available and has been released by Apple in Safari 26.3 and corresponding OS versions (iOS 18.7.5, iPadOS 18.7.5, macOS Tahoe 26.3, visionOS 26.3). Red Hat has also provided patches for webkitgtk4 in RHEL 7 Extended Life Cycle Support. Users and administrators should apply these official updates to remediate the vulnerability. Patch status is confirmed by vendor advisories. No additional mitigation is required beyond applying these updates.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- apple
- Date Reserved
- 2025-11-11T14:43:07.862Z
- State
- PUBLISHED
- Vendor Advisory Urls
- [{"url":"https://access.redhat.com/security/cve/CVE-2026-20644","vendor":"Red Hat"},{"url":"https://access.redhat.com/errata/RHSA-2026:22136","vendor":"Red Hat"},{"url":"https://access.redhat.com/errata/RHSA-2026:10702","vendor":"Red Hat"},{"url":"https://access.redhat.com/errata/RHSA-2026:16056","vendor":"Red Hat"},{"url":"https://access.redhat.com/errata/RHSA-2026:13845","vendor":"Red Hat"},{"url":"https://access.redhat.com/errata/RHSA-2026:11814","vendor":"Red Hat"},{"url":"https://access.redhat.com/errata/RHSA-2026:19535","vendor":"Red Hat"},{"url":"https://access.redhat.com/errata/RHSA-2026:16695","vendor":"Red Hat"},{"url":"https://access.redhat.com/errata/RHSA-2026:14659","vendor":"Red Hat"},{"url":"https://access.redhat.com/errata/RHSA-2026:11329","vendor":"Red Hat"},{"url":"https://access.redhat.com/errata/RHSA-2026:9692","vendor":"Red Hat"},{"url":"https://access.redhat.com/errata/RHSA-2026:19206","vendor":"Red Hat"}]
Threat ID: 698d0dcb4b57a58fa1d96069
Added to database: 02/11/2026, 23:16:27 UTC
Last enriched: 07/15/2026, 08:31:21 UTC
Last updated: 09/10/2026, 19:36:52 UTC
Views: 161
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