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.

The remote Ubuntu 24.04 LTS / 25.10 / 26.04 LTS host has packages installed that are affected by multiple vulnerabilities as referenced in the USN-8237-1 advisory.

    Several security issues were discovered in the WebKitGTK Web and JavaScript engines. If a user were     tricked into viewing a malicious website, a remote attacker could exploit a variety of issues related to     web browser security, including cross-site scripting attacks, denial of service attacks, and arbitrary     code execution.

Tenable has extracted the preceding description block directly from the Ubuntu security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The remote SUSE Linux SLES12 host has packages installed that are affected by multiple vulnerabilities as referenced in the SUSE-SU-2026:1648-1 advisory.

    Update to version 2.52.1.

    Security issues fixed:

    - CVE-2026-20643: processing maliciously crafted web content may bypass Same Origin Policy (bsc#1261172).
    - CVE-2026-20664: processing maliciously crafted web content may lead to an unexpected process crash     (bsc#1261173).
    - CVE-2026-20665: processing maliciously crafted web content may prevent Content Security Policy from     being enforced       (bsc#1261174).
    - CVE-2026-20691: a maliciously crafted webpage may be able to fingerprint the user (bsc#1261175).
    - CVE-2026-28857: processing maliciously crafted web content may lead to an unexpected process crash     (bsc#1261176).
    - CVE-2026-28859: a malicious website may be able to process restricted web content outside the sandbox     (bsc#1261177).
    - CVE-2026-28861: a malicious website may be able to access script message handlers intended for other     origins       (bsc#1261178).
    - CVE-2026-28871: visiting a maliciously crafted website may lead to a cross-site scripting attack     (bsc#1261179).

    Other updates and bugfixes:

    - Reduce the amount of useless MPRIS notifications produced by MediaSession when the information about     media being       played is incomplete.
    - Support turning off USE_GSTREAMER to configure the build with all multimedia features disabled.
    - Add Sysprof marks for mouse events.
    - Fix MediaSession icon for iheart.com not being displayed.
    - Fix the build with USE_GSTREAMER_GL disabled.
    - Fix the build with librice version 0.3.0 or newer.
    - Fix several crashes and rendering issues.
    - Translation updates: Georgian.

Tenable has extracted the preceding description block directly from the SUSE security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The version of webkitgtk4 installed on the remote host is prior to 2.52.1-1. It is, therefore, affected by multiple vulnerabilities as referenced in the ALAS2-2026-3270 advisory.

    A memory initialization issue was addressed with improved memory handling. This issue is fixed in tvOS     26.2, Safari 26.2, watchOS 26.2, visionOS 26.2, iOS 26.2 and iPadOS 26.2, macOS Tahoe 26.2. Processing     maliciously crafted web content may disclose internal states of the app. (CVE-2025-46299)

    A cross-origin issue in the Navigation API was addressed with improved input validation. This issue is     fixed in Background Security Improvements for iOS, iPadOS, and macOS, 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. Processing maliciously crafted web     content may bypass Same Origin Policy. (CVE-2026-20643)

    The issue was addressed with improved memory handling. This issue is fixed in Safari 26.4, iOS 26.4 and     iPadOS 26.4, macOS Tahoe 26.4, visionOS 26.4. Processing maliciously crafted web content may lead to an     unexpected process crash. (CVE-2026-20664)

    This issue was addressed through 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, tvOS 26.4, visionOS 26.4, watchOS 26.4.
    Processing maliciously crafted web content may prevent Content Security Policy from being enforced.
    (CVE-2026-20665)

    An authorization issue was addressed with improved state management. This issue is fixed in Safari 26.4,     iOS 26.4 and iPadOS 26.4, macOS Tahoe 26.4, visionOS 26.4, watchOS 26.4. A maliciously crafted webpage may     be able to fingerprint the user. (CVE-2026-20691)

    The issue was addressed with improved memory handling. This issue is fixed in Safari 26.4, iOS 26.4 and     iPadOS 26.4, macOS Tahoe 26.4, visionOS 26.4. Processing maliciously crafted web content may lead to an     unexpected process crash. (CVE-2026-28857)

    The issue was addressed with improved memory handling. This issue is fixed in Safari 26.4, iOS 26.4 and     iPadOS 26.4, macOS Tahoe 26.4, tvOS 26.4, visionOS 26.4, watchOS 26.4. A malicious website may be able to     process restricted web content outside the sandbox. (CVE-2026-28859)

    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. (CVE-2026-28861)

    A logic issue was addressed with improved checks. 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. Visiting a maliciously crafted website may lead     to a cross-site scripting attack. (CVE-2026-28871)

Tenable has extracted the preceding description block directly from the tested product security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The remote Debian 13 host has packages installed that are affected by multiple vulnerabilities as referenced in the dsa-6232 advisory.

    - -------------------------------------------------------------------------     Debian Security Advisory DSA-6232-1                   security@debian.org     https://www.debian.org/security/                           Alberto Garcia     April 28, 2026                        https://www.debian.org/security/faq
    - -------------------------------------------------------------------------

    Package        : webkit2gtk     CVE ID         : CVE-2025-46299 CVE-2026-20643 CVE-2026-20664 CVE-2026-20665                      CVE-2026-20691 CVE-2026-28857 CVE-2026-28859 CVE-2026-28861                      CVE-2026-28871

    The following vulnerabilities have been discovered in the WebKitGTK     web engine:

    CVE-2025-46299

        Google Big Sleep discovered that processing maliciously crafted         web content may disclose internal states of the app.

    CVE-2026-20643

        Thomas Espach discovered that processing maliciously crafted web         content may bypass Same Origin Policy.

    CVE-2026-20664

        Daniel Rhea, Soehnke Benedikt Fischedick, Emrovsky & Switch, and         Yevhen Pervushyn discovered that processing maliciously crafted         web content may lead to an unexpected process crash

    CVE-2026-20665

        webb discovered that processing maliciously crafted web content         may prevent Content Security Policy from being enforced.

    CVE-2026-20691

        Gongyu Ma discovered that a maliciously crafted webpage may be         able to fingerprint the user.

    CVE-2026-28857

        Narcis Oliveras Fontas, Soehnke Benedikt Fischedick, Daniel Rhea,         and Nathaniel Oh discovered that processing maliciously crafted         web content may lead to an unexpected process crash.

    CVE-2026-28859

        greenbynox and Arni Hardarson discovered that a malicious website         may be able to process restricted web content outside the sandbox.

    CVE-2026-28861

        Hongze Wu and Shuaike Dong discovered that a malicious website may         be able to access script message handlers intended for other         origins.

    CVE-2026-28871

        @hamayanhamayan discovered that visiting a maliciously crafted         website may lead to a cross- site scripting attack.

    Starting from version 2.52.0, WebKitGTK can no longer be backported to     the oldstable distribution (bookworm). Because of that, the webkit2gtk     packages are no longer covered by security support in bookworm.

    For the stable distribution (trixie), these problems have been fixed in     version 2.52.1-1~deb13u1.

    We recommend that you upgrade your webkit2gtk packages.

    For the detailed security status of webkit2gtk please refer to     its security tracker page at:
    https://security-tracker.debian.org/tracker/webkit2gtk

    Further information about Debian Security Advisories, how to apply     these updates to your system and frequently asked questions can be     found at: https://www.debian.org/security/

    Mailing list: debian-security-announce@lists.debian.org

Tenable has extracted the preceding description block directly from the Debian security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The remote SUSE Linux SLED15 / SLED_SAP15 / SLES15 / SLES_SAP15 / openSUSE 15 host has packages installed that are affected by multiple vulnerabilities as referenced in the SUSE-SU-2026:1364-1 advisory.

    Update to version 2.52.0.

    Security issues fixed:

    - CVE-2023-43010: processing maliciously crafted web content may lead to memory corruption (bsc#1259950).
    - CVE-2025-31223: processing maliciously crafted web content may lead to memory corruption (bsc#1259949).
    - CVE-2025-31277: processing maliciously crafted web content may lead to memory corruption (bsc#1259948).
    - CVE-2025-43213: processing maliciously crafted web content may lead to an unexpected crash     (bsc#1259947).
    - CVE-2025-43214: processing maliciously crafted web content may lead to an unexpected crash     (bsc#1259946).
    - CVE-2025-43433: processing maliciously crafted web content may lead to memory corruption (bsc#1259945).
    - CVE-2025-43438: processing maliciously crafted web content may lead to an unexpected crash     (bsc#1259944).
    - CVE-2025-43441: processing maliciously crafted web content may lead to an unexpected process crash     (bsc#1259943).
    - CVE-2025-43457: processing maliciously crafted web content may lead to an unexpected crash     (bsc#1259942).
    - CVE-2025-43511: processing maliciously crafted web content may lead to an unexpected process crash     (bsc#1259941).
    - CVE-2025-46299: processing maliciously crafted web content may disclose internal states of an app     (bsc#1259940).
    - CVE-2026-20608: processing maliciously crafted web content may lead to an unexpected process crash     (bsc#1259939).
    - CVE-2026-20635: processing maliciously crafted web content may lead to an unexpected process crash     (bsc#1259938).
    - CVE-2026-20636: processing maliciously crafted web content may lead to an unexpected process crash     (bsc#1259937).
    - CVE-2026-20643: processing maliciously crafted web content may bypass Same Origin Policy (bsc#1261172).
    - CVE-2026-20644: processing maliciously crafted web content may lead to an unexpected process crash     (bsc#1259936).
    - CVE-2026-20652: a remote attacker may be able to cause a denial-of-service (bsc#1259935).
    - CVE-2026-20664: processing maliciously crafted web content may lead to an unexpected process crash     (bsc#1261173).
    - CVE-2026-20665: processing maliciously crafted web content may prevent Content Security Policy from     being enforced       (bsc#1261174).
    - CVE-2026-20676: a website may be able to track users through web extensions (bsc#1259934).
    - CVE-2026-20691: a maliciously crafted webpage may be able to fingerprint the user (bsc#1261175).
    - CVE-2026-28857: processing maliciously crafted web content may lead to an unexpected process crash     (bsc#1261176).
    - CVE-2026-28859: a malicious website may be able to process restricted web content outside the sandbox     (bsc#1261177).
    - CVE-2026-28861: a malicious website may be able to access script message handlers intended for other     origins       (bsc#1261178).
    - CVE-2026-28871: visiting a maliciously crafted website may lead to a cross-site scripting attack     (bsc#1261179).

    Other updates and bugfixes:

    - Make scrolling with touch input smoother for small movements.
    - Fix estimated load progress of downloads when Content-Length value is wrong.
    - Ensure that 'scrollend' events are correctly emitted after scroll animations.
    - Reduce the amount of useless MPRIS notifications produced by MediaSession when the information about     media being       played is incomplete.
    - Support turning off USE_GSTREAMER to configure the build with all multimedia features disabled.
    - Add Sysprof marks for mouse events.
    - Fix MediaSession icon for iheart.com not being displayed.
    - Fix the build with USE_GSTREAMER_GL disabled.
    - Fix the build with librice version 0.3.0 or newer.
    - Fix several crashes and rendering issues.
    - Translation updates: Georgian.

Tenable has extracted the preceding description block directly from the SUSE security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available.

  - 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. (CVE-2026-28861)

Note that Nessus relies on the presence of the package as reported by the vendor.

The version of Apple iOS running on the mobile device is prior to 26.4. It is, therefore, affected by multiple vulnerabilities.

The remote host is running a version of macOS / Mac OS X that is 26.x prior to 26.4. It is, therefore, affected by multiple vulnerabilities:

  - Apache HTTP Server 2.4.65 and earlier with Server Side Includes (SSI) enabled and mod_cgid (but not     mod_cgi) passes the shell-escaped query string to #exec cmd=... directives. This issue affects Apache     HTTP Server before 2.4.66. Users are recommended to upgrade to version 2.4.66, which fixes the issue.
    (CVE-2025-58098)

  - When an OAuth2 bearer token is used for an HTTP(S) transfer, and that transfer performs a cross-protocol     redirect to a second URL that uses an IMAP, LDAP, POP3 or SMTP scheme, curl might wrongly pass on the     bearer token to the new target host. (CVE-2025-14524)

  - An integer overflow in the case of failed ACME certificate renewal leads, after a number of failures (~30     days in default configurations), to the backoff timer becoming 0. Attempts to renew the certificate then     are repeated without delays until it succeeds. This issue affects Apache HTTP Server: from 2.4.30 before     2.4.66. Users are recommended to upgrade to version 2.4.66, which fixes the issue. (CVE-2025-55753)

  - Server-Side Request Forgery (SSRF) vulnerability in Apache HTTP Server on Windows with AllowEncodedSlashes     On and MergeSlashes Off allows to potentially leak NTLM hashes to a malicious server via SSRF and     malicious requests or content Users are recommended to upgrade to version 2.4.66, which fixes the issue.
    (CVE-2025-59775)

  - LIBPNG is a reference library for use in applications that read, create, and manipulate PNG (Portable     Network Graphics) raster image files. Prior to version 1.6.51, a heap buffer over-read vulnerability     exists in libpng's png_do_quantize function when processing PNG files with malformed palette indices. The     vulnerability occurs when palette_lookup array bounds are not validated against externally-supplied image     data, allowing an attacker to craft a PNG file with out-of-range palette indices that trigger out-of-     bounds memory access. This issue has been patched in version 1.6.51. (CVE-2025-64505)

Note that Nessus has not tested for these issues but has instead relied only on the operating system's self-reported version number.

The version of Apple iOS running on the mobile device is prior to 18.7.7. It is, therefore, affected by multiple vulnerabilities.

ID	Name	Product	Family	Severity
313208	Ubuntu 24.04 LTS / 25.10 / 26.04 LTS : WebKitGTK vulnerabilities (USN-8237-1)	Nessus	Ubuntu Local Security Checks	medium
311756	SUSE SLES12 Security Update : webkit2gtk3 (SUSE-SU-2026:1648-1)	Nessus	SuSE Local Security Checks	medium
311208	Amazon Linux 2 : webkitgtk4, --advisory ALAS2-2026-3270 (ALAS-2026-3270)	Nessus	Amazon Linux Local Security Checks	medium
310721	Debian dsa-6232 : gir1.2-javascriptcoregtk-4.1 - security update	Nessus	Debian Local Security Checks	medium
306700	SUSE SLED15 / SLES15 / openSUSE 15 Security Update : webkit2gtk3 (SUSE-SU-2026:1364-1)	Nessus	SuSE Local Security Checks	medium
304095	Linux Distros Unpatched Vulnerability : CVE-2026-28861	Nessus	Misc.	medium
303482	Apple iOS < 26.4 Multiple Vulnerabilities (126792)	Nessus	Mobile Devices	high
303481	macOS 26.x < 26.4 Multiple Vulnerabilities (126794)	Nessus	MacOS X Local Security Checks	high
303480	Apple iOS < 18.7.7 Multiple Vulnerabilities (126793)	Nessus	Mobile Devices	high

Detections

Analytics

CVE-2026-28861

medium

Tenable Plugins

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