In Flatpak before 1.18.1, a malicious sandboxed app can replace ~/.var/app/$appid/.ld.so with a symlink, causing regenerate_ld_cache to write files at an arbitrary location. The filenames and content are not attacker controlled, making this hard to exploit.

The remote SUSE Linux SLED15 / SLED_SAP15 / SLES15 / SLES_SAP15 host has packages installed that are affected by multiple vulnerabilities as referenced in the SUSE-SU-2026:4944-1 advisory.

    - CVE-2026-90616: missing symlink protection allows a malicious sandboxed app to obtain arbitrary read and     write access       to files on the host (bsc#1280236).
    - CVE-2026-92162: path traversal via unvalidated `arch` parameter in `DeployAppstream` (bsc#1282514).
    - CVE-2026-96275: arbitrary write access as root via extra-data extraction (bsc#1282515).
    - CVE-2026-96276: arbitrary write in host context via `flatpak build-init` (bsc#1282516).
    - CVE-2026-96280: buffer overflow in OCI delta stream path names (bsc#1282518).
    - CVE-2026-96281: unprivileged active user can bypass anti-downgrade checks for system apps/runtimes     (bsc#1282519).
    - CVE-2026-96282: extension metadata path traversal file existence oracle (bsc#1282520).
    - CVE-2026-96807: fixed-filename writes to arbitrary locations via symlink attack on `.ld.so`     (bsc#1282523).
    - CVE-2026-96808: `revokefs` symlink path traversal allows local privilege escalation via commit tampering       (bsc#1282524).

    Changes for flatpak:

    - Update to version 1.16.6 (jsc#PED-17048):
     + Fix file descriptor leaks affecting Chromium-based browsers.
     + Fix installing extra-data without a runtime, including openh264.
     + Fix unusable sandbox-expose paths affecting Epiphany.
     + Fix installed tests and handling of file descriptor arguments.
    - Changes from version 1.16.5:
     + Fix regressions from the sandbox escape security fix affecting      browsers, browser-based apps and Steam.
     + Expand test coverage of flatpak-run features used by the portal.
    - Changes from version 1.16.4:
     + Prevent arbitrary file reads in the system-helper context      (GHSA-2fxp-43j9-pwvc).
     + Prevent orphaning cross-user pull operations (GHSA-89xm-3m96-w3jg).
    - Changes from version 1.16.3:
     + Be selective about mapping font-dirs.xml in flatpak build.
    - Changes from version 1.16.2:
     + Support reinstalling bundle installations and Intel Xe VA-API.
     + Add cancellation support for curl downloads.
     + Fix font configuration, mask and pin configuration reloads,      unintended home directory access, flatpak kill, OCI support,      memory leaks and crashes.
    - Changes from version 1.16.1:
     + Allow updating existing apps under parental controls by default.
     + Use instance IDs for systemd scopes and include /dev/udmabuf      with --device=dri.
     + Speed up prune --dry-run and permission-reset.
     + Support TLS certificates in /etc/containers/certs.d for OCI.
     + Fix portal crashes, sandbox environment handling, accessibility      bus discovery, error reporting and shell completion.
     + Update documentation and translations.

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 remote Fedora 43 host has a package installed that is affected by multiple vulnerabilities as referenced in the FEDORA-2026-a896cbb3f0 advisory.

    Fixes CVE-2026-96807 and CVE-2026-96808

Tenable has extracted the preceding description block directly from the Fedora 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 / SLES_SAP12 host has packages installed that are affected by multiple vulnerabilities as referenced in the SUSE-SU-2026:4610-1 advisory.

    - CVE-2026-90616: missing symlink protection allows a malicious sandboxed app to obtain arbitrary read and     write access       to files on the host (bsc#1280236).
    - CVE-2026-92162: path traversal via unvalidated `arch` parameter in `DeployAppstream` (bsc#1282514).
    - CVE-2026-96275: arbitrary write access as root via extra-data extraction (bsc#1282515).
    - CVE-2026-96276: arbitrary write in host context via `flatpak build-init` (bsc#1282516).
    - CVE-2026-96281: unprivileged active user can bypass anti-downgrade checks for system apps/runtimes     (bsc#1282519).
    - CVE-2026-96282: extension metadata path traversal file existence oracle (bsc#1282520).
    - CVE-2026-96283: flatpak-system-helper: cross-user `CancelPull` orphans another user's ongoing pull     (bsc#1282521).
    - CVE-2026-96807: fixed-filename writes to arbitrary locations via symlink attack on `.ld.so`     (bsc#1282523).
    - CVE-2026-96808: `revokefs` symlink path traversal allows local privilege escalation via commit tampering       (bsc#1282524).

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 AlmaLinux 9.2 host has packages installed that are affected by a vulnerability as referenced in the TuxCare ALMALINUX9.2:CLSA-2026:1791819150 advisory.

  - In Flatpak before 1.18.1, a malicious sandboxed app can replace ~/.var/app/$appid/.ld.so with a symlink,     causing regenerate_ld_cache to write files at an arbitrary location. The filenames and content are not     attacker controlled, making this hard to exploit. (CVE-2026-96807)

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

The AlmaLinux 9.6 host has packages installed that are affected by a vulnerability as referenced in the TuxCare ALMALINUX9.6:CLSA-2026:1791735057 advisory.

  - In Flatpak before 1.18.1, a malicious sandboxed app can replace ~/.var/app/$appid/.ld.so with a symlink,     causing regenerate_ld_cache to write files at an arbitrary location. The filenames and content are not     attacker controlled, making this hard to exploit. (CVE-2026-96807)

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

The Rocky Linux 9.6 host has packages installed that are affected by a vulnerability as referenced in the TuxCare ALMALINUX9.6:CLSA-2026:1791735057 advisory.

  - In Flatpak before 1.18.1, a malicious sandboxed app can replace ~/.var/app/$appid/.ld.so with a symlink,     causing regenerate_ld_cache to write files at an arbitrary location. The filenames and content are not     attacker controlled, making this hard to exploit. (CVE-2026-96807)

Note that Nessus has not tested for this issue 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.

  - In Flatpak before 1.18.1, a malicious sandboxed app can replace ~/.var/app/$appid/.ld.so with a symlink,     causing regenerate_ld_cache to write files at an arbitrary location. The filenames and content are not     attacker controlled, making this hard to exploit. (CVE-2026-96807)

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

ID	Name	Product	Family	Type	Severity
374780	SUSE SLED15: flatpak / flatpak-devel / flatpak-remote-flathub / etc (SUSE-SU-2026:4944-1)	Nessus	SuSE Local Security Checks	Local	high
372886	Fedora 43 : flatpak (2026-a896cbb3f0)	Nessus	Fedora Local Security Checks	Local	high
369263	SUSE SLES12 Security Update : flatpak (SUSE-SU-2026:4610-1)	Nessus	SuSE Local Security Checks	Local	high
368053	AlmaLinux 9.2 [TuxCare] Security Update: flatpak / flatpak-devel / flatpak-libs / flatpak-selinux / etc (ALMALINUX9.2:CLSA-2026:1791819150)	Nessus	Alma Linux Local Security Checks	Local	medium
364568	AlmaLinux 9.6 [TuxCare] Security Update: flatpak / flatpak-devel / flatpak-libs / flatpak-selinux / etc (ALMALINUX9.6:CLSA-2026:1791735057)	Nessus	Alma Linux Local Security Checks	Local	medium
364564	Rocky Linux 9.6 [TuxCare] Security Update: flatpak / flatpak-devel / flatpak-libs / flatpak-selinux / etc (ALMALINUX9.6:CLSA-2026:1791735057)	Nessus	Rocky Linux Local Security Checks	Local	medium
349584	Linux Distros Unpatched Vulnerability : CVE-2026-96807	Nessus	Misc.	Local	medium

Detections

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CVE-2026-96807

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