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CVE-2026-43794

HIGH 8.8 ALL-YEARS

Published 2026-08-17 · Last modified 2026-10-20 · apple · NVD: Modified

A memory corruption issue was addressed with improved memory handling. This issue is fixed in Safari 26.6.1, iOS 18.7.10 and iPadOS 18.7.10, iOS 26.6.1 and iPadOS 26.6.1, macOS Tahoe 26.6.2, tvOS 27, visionOS 27, watchOS 27. Processing maliciously crafted web content may lead to memory corruption.

ELEVATED IMPACT

Severe if exploited (CVSS 8.8), but no confirmed exploitation. Patch on a normal cadence.

Exploitation likelihood

0.4%chance of exploitation in 30 days · 36th percentile

○ In CISA KEV○ Catalogued PoC◆ SSVC: exploitation none, automatable no

Impact if exploited

8.8CVSS 3.1 · HIGH · ADP

  • ConfidentialityHigh
  • IntegrityHigh
  • AvailabilityHigh

What an attacker needs

  • ✓Access: Reachable over the network — no local access needed
  • ✓Privileges: No account or privileges required
  • ⚠User interaction: A user must take an action (click / open a file)
  • ✓Complexity: No special conditions — reliably repeatable

✓ lowers the bar for an attacker · ⚠ raises it

Proof of concept

No public PoC is currently catalogued.

Search for new PoCs

Search GitHub now — results may be empty or unverified.

Tracked sources are checked weekly for the full archive, including PoCs published after the original disclosure. A later release appears after a tracked source lists it and a refresh succeeds.

Affected

Vendors Apple

Products Safari Ios And Ipados Macos Tvos Visionos Watchos Ipados Iphone Os

Weakness (CWE)

  • CWE-119: Improper Restriction of Operations within the Bounds of a Memory Buffer

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

References and research data (JSON)

Vendor product assessments

  • webkitgtk as a component of Red Hat Enterprise Linux 6 · known affected

    Vendor assessment for this product only.

    pkg:rpm/redhat/webkitgtk

    • workaround: Do not process or load untrusted web content with WebKitGTK. In Red Hat Enterprise Linux 7, the following packages require WebKitGTK4: evolution-data-server, glade, gnome-boxes, gnome-initial-setup, gnome-online-accounts, gnome-shell, shotwell, sushi and yelp. This vulnerability can only be exploited when these packages are installed in the system and being used via a graphical interface to process untrusted web content, via GNOME for example. In gnome-shell, the vulnerability can be exploited by an attacker from the local network without user interaction. To mitigate this vulnerability, consider removing these packages. Note that some of these packages are required by GNOME, removing them will also remove GNOME and other packages, breaking functionality. However, the server can still be used via the terminal interface. Additionally, WebKitGTK3 is not required by any package. Therefore, it can be removed without consequences or break of functionality.
    • no fix planned: Out of support scope
    Red Hat · CVE-2026-43794 · Updated 2026-08-31T18:24:21+00:00
  • webkitgtk-devel as a component of Red Hat Enterprise Linux 6 · known affected

    Vendor assessment for this product only.

    pkg:rpm/redhat/webkitgtk-devel

    • workaround: Do not process or load untrusted web content with WebKitGTK. In Red Hat Enterprise Linux 7, the following packages require WebKitGTK4: evolution-data-server, glade, gnome-boxes, gnome-initial-setup, gnome-online-accounts, gnome-shell, shotwell, sushi and yelp. This vulnerability can only be exploited when these packages are installed in the system and being used via a graphical interface to process untrusted web content, via GNOME for example. In gnome-shell, the vulnerability can be exploited by an attacker from the local network without user interaction. To mitigate this vulnerability, consider removing these packages. Note that some of these packages are required by GNOME, removing them will also remove GNOME and other packages, breaking functionality. However, the server can still be used via the terminal interface. Additionally, WebKitGTK3 is not required by any package. Therefore, it can be removed without consequences or break of functionality.
    • no fix planned: Out of support scope
    Red Hat · CVE-2026-43794 · Updated 2026-08-31T18:24:21+00:00
  • webkitgtk-doc as a component of Red Hat Enterprise Linux 6 · known affected

    Vendor assessment for this product only.

    pkg:rpm/redhat/webkitgtk-doc

    • workaround: Do not process or load untrusted web content with WebKitGTK. In Red Hat Enterprise Linux 7, the following packages require WebKitGTK4: evolution-data-server, glade, gnome-boxes, gnome-initial-setup, gnome-online-accounts, gnome-shell, shotwell, sushi and yelp. This vulnerability can only be exploited when these packages are installed in the system and being used via a graphical interface to process untrusted web content, via GNOME for example. In gnome-shell, the vulnerability can be exploited by an attacker from the local network without user interaction. To mitigate this vulnerability, consider removing these packages. Note that some of these packages are required by GNOME, removing them will also remove GNOME and other packages, breaking functionality. However, the server can still be used via the terminal interface. Additionally, WebKitGTK3 is not required by any package. Therefore, it can be removed without consequences or break of functionality.
    • no fix planned: Out of support scope
    Red Hat · CVE-2026-43794 · Updated 2026-08-31T18:24:21+00:00
  • webkitgtk.src as a component of Red Hat Enterprise Linux 6 · known affected

    Vendor assessment for this product only.

    pkg:rpm/redhat/webkitgtk?arch=src

    • workaround: Do not process or load untrusted web content with WebKitGTK. In Red Hat Enterprise Linux 7, the following packages require WebKitGTK4: evolution-data-server, glade, gnome-boxes, gnome-initial-setup, gnome-online-accounts, gnome-shell, shotwell, sushi and yelp. This vulnerability can only be exploited when these packages are installed in the system and being used via a graphical interface to process untrusted web content, via GNOME for example. In gnome-shell, the vulnerability can be exploited by an attacker from the local network without user interaction. To mitigate this vulnerability, consider removing these packages. Note that some of these packages are required by GNOME, removing them will also remove GNOME and other packages, breaking functionality. However, the server can still be used via the terminal interface. Additionally, WebKitGTK3 is not required by any package. Therefore, it can be removed without consequences or break of functionality.
    • no fix planned: Out of support scope
    Red Hat · CVE-2026-43794 · Updated 2026-08-31T18:24:21+00:00
  • libwebkit2gtk as a component of Red Hat Enterprise Linux 7 · known not affected

    Vendor assessment for this product only.

    Reason: vulnerable code not present

    pkg:rpm/redhat/libwebkit2gtk

    Red Hat · CVE-2026-43794 · Updated 2026-08-31T18:24:21+00:00
  • webkitgtk3 as a component of Red Hat Enterprise Linux 7 · known not affected

    Vendor assessment for this product only.

    Reason: vulnerable code not present

    pkg:rpm/redhat/webkitgtk3

    Red Hat · CVE-2026-43794 · Updated 2026-08-31T18:24:21+00:00
  • webkitgtk3-devel as a component of Red Hat Enterprise Linux 7 · known not affected

    Vendor assessment for this product only.

    Reason: vulnerable code not present

    pkg:rpm/redhat/webkitgtk3-devel

    Red Hat · CVE-2026-43794 · Updated 2026-08-31T18:24:21+00:00
  • webkitgtk3-doc as a component of Red Hat Enterprise Linux 7 · known not affected

    Vendor assessment for this product only.

    Reason: vulnerable code not present

    pkg:rpm/redhat/webkitgtk3-doc

    Red Hat · CVE-2026-43794 · Updated 2026-08-31T18:24:21+00:00
  • webkitgtk3.src as a component of Red Hat Enterprise Linux 7 · known not affected

    Vendor assessment for this product only.

    Reason: vulnerable code not present

    pkg:rpm/redhat/webkitgtk3?arch=src

    Red Hat · CVE-2026-43794 · Updated 2026-08-31T18:24:21+00:00
  • webkitgtk4 as a component of Red Hat Enterprise Linux 7 · known not affected

    Vendor assessment for this product only.

    Reason: vulnerable code not present

    pkg:rpm/redhat/webkitgtk4

    Red Hat · CVE-2026-43794 · Updated 2026-08-31T18:24:21+00:00
  • webkitgtk4-devel as a component of Red Hat Enterprise Linux 7 · known not affected

    Vendor assessment for this product only.

    Reason: vulnerable code not present

    pkg:rpm/redhat/webkitgtk4-devel

    Red Hat · CVE-2026-43794 · Updated 2026-08-31T18:24:21+00:00
  • webkitgtk4-doc as a component of Red Hat Enterprise Linux 7 · known not affected

    Vendor assessment for this product only.

    Reason: vulnerable code not present

    pkg:rpm/redhat/webkitgtk4-doc

    Red Hat · CVE-2026-43794 · Updated 2026-08-31T18:24:21+00:00
  • webkitgtk4-jsc as a component of Red Hat Enterprise Linux 7 · known not affected

    Vendor assessment for this product only.

    Reason: vulnerable code not present

    pkg:rpm/redhat/webkitgtk4-jsc

    Red Hat · CVE-2026-43794 · Updated 2026-08-31T18:24:21+00:00
  • webkitgtk4-jsc-devel as a component of Red Hat Enterprise Linux 7 · known not affected

    Vendor assessment for this product only.

    Reason: vulnerable code not present

    pkg:rpm/redhat/webkitgtk4-jsc-devel

    Red Hat · CVE-2026-43794 · Updated 2026-08-31T18:24:21+00:00
  • webkitgtk4-plugin-process-gtk2 as a component of Red Hat Enterprise Linux 7 · known not affected

    Vendor assessment for this product only.

    Reason: vulnerable code not present

    pkg:rpm/redhat/webkitgtk4-plugin-process-gtk2

    Red Hat · CVE-2026-43794 · Updated 2026-08-31T18:24:21+00:00
  • webkitgtk4.src as a component of Red Hat Enterprise Linux 7 · known not affected

    Vendor assessment for this product only.

    Reason: vulnerable code not present

    pkg:rpm/redhat/webkitgtk4?arch=src

    Red Hat · CVE-2026-43794 · Updated 2026-08-31T18:24:21+00:00
  • webkit2gtk3 as a component of Red Hat Enterprise Linux 8 · known not affected

    Vendor assessment for this product only.

    Reason: vulnerable code not present

    pkg:rpm/redhat/webkit2gtk3

    Red Hat · CVE-2026-43794 · Updated 2026-08-31T18:24:21+00:00
  • webkit2gtk3-devel as a component of Red Hat Enterprise Linux 8 · known not affected

    Vendor assessment for this product only.

    Reason: vulnerable code not present

    pkg:rpm/redhat/webkit2gtk3-devel

    Red Hat · CVE-2026-43794 · Updated 2026-08-31T18:24:21+00:00
  • webkit2gtk3-jsc as a component of Red Hat Enterprise Linux 8 · known not affected

    Vendor assessment for this product only.

    Reason: vulnerable code not present

    pkg:rpm/redhat/webkit2gtk3-jsc

    Red Hat · CVE-2026-43794 · Updated 2026-08-31T18:24:21+00:00
  • webkit2gtk3-jsc-devel as a component of Red Hat Enterprise Linux 8 · known not affected

    Vendor assessment for this product only.

    Reason: vulnerable code not present

    pkg:rpm/redhat/webkit2gtk3-jsc-devel

    Red Hat · CVE-2026-43794 · Updated 2026-08-31T18:24:21+00:00
  • webkit2gtk3-plugin-process-gtk2 as a component of Red Hat Enterprise Linux 8 · known not affected

    Vendor assessment for this product only.

    Reason: vulnerable code not present

    pkg:rpm/redhat/webkit2gtk3-plugin-process-gtk2

    Red Hat · CVE-2026-43794 · Updated 2026-08-31T18:24:21+00:00
  • webkit2gtk3.src as a component of Red Hat Enterprise Linux 8 · known not affected

    Vendor assessment for this product only.

    Reason: vulnerable code not present

    pkg:rpm/redhat/webkit2gtk3?arch=src

    Red Hat · CVE-2026-43794 · Updated 2026-08-31T18:24:21+00:00
  • webkit2gtk3 as a component of Red Hat Enterprise Linux 9 · known not affected

    Vendor assessment for this product only.

    Reason: vulnerable code not present

    pkg:rpm/redhat/webkit2gtk3

    Red Hat · CVE-2026-43794 · Updated 2026-08-31T18:24:21+00:00
  • webkit2gtk3-devel as a component of Red Hat Enterprise Linux 9 · known not affected

    Vendor assessment for this product only.

    Reason: vulnerable code not present

    pkg:rpm/redhat/webkit2gtk3-devel

    Red Hat · CVE-2026-43794 · Updated 2026-08-31T18:24:21+00:00
  • webkit2gtk3-jsc as a component of Red Hat Enterprise Linux 9 · known not affected

    Vendor assessment for this product only.

    Reason: vulnerable code not present

    pkg:rpm/redhat/webkit2gtk3-jsc

    Red Hat · CVE-2026-43794 · Updated 2026-08-31T18:24:21+00:00
  • webkit2gtk3-jsc-devel as a component of Red Hat Enterprise Linux 9 · known not affected

    Vendor assessment for this product only.

    Reason: vulnerable code not present

    pkg:rpm/redhat/webkit2gtk3-jsc-devel

    Red Hat · CVE-2026-43794 · Updated 2026-08-31T18:24:21+00:00
  • webkit2gtk3.src as a component of Red Hat Enterprise Linux 9 · known not affected

    Vendor assessment for this product only.

    Reason: vulnerable code not present

    pkg:rpm/redhat/webkit2gtk3?arch=src

    Red Hat · CVE-2026-43794 · Updated 2026-08-31T18:24:21+00:00

Known Affected Software Configurations

VendorProductVersion range
AppleSafari< 26.6.1
AppleIpados< 18.7.10
AppleIpados≥ 26.0 and < 26.6.1
AppleIphone Os< 18.7.10
AppleIphone Os≥ 26.0 and < 26.6.1
AppleMacos≥ 26.0 and < 26.6.2

All CVSS metrics

  • HIGH 8.8 v3.1 · ADP Primary
    CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
  • HIGH 8.8 v3.1 · NVD Secondary
    CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

References

Advisories

Technical & other

Sources: NVD · CVE.org · All sources and attribution · EPSS