A flaw was found in bubblewrap. During sandbox setup, creating files or directories under the new root can follow a parent symlink onto the host via /oldroot, writing attacker-chosen paths outside the sandbox as the launching user. This happens before the sandboxed process starts. This issue is GHSA-pxhw-h44j-8pfx. It is fixed in bubblewrap 0.12.0.

It is, therefore, affected by a vulnerability as referenced in the ALAS2023-2026-3105 advisory.

    A flaw was found in bubblewrap. During sandbox setup, creating files or directories under the new root can     follow a parent symlink onto the host via /oldroot, writing attacker-chosen paths outside the sandbox as     the launching user. This happens before the sandboxed process starts. This issue is GHSA-pxhw-h44j-8pfx.
    It is fixed in bubblewrap 0.12.0. (CVE-2026-87766)

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

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

The version of Tencent Linux installed on the remote TencentOS Server 4 host is prior to tested version. It is, therefore, affected by a vulnerability as referenced in the TSSA-2026:1022 advisory.

    Package updates are available for TencentOS Server 4 that fix the following vulnerabilities:

    CVE-2026-87766:
    A flaw was found in bubblewrap. During sandbox setup, creating files or directories under the new root can     follow a parent symlink onto the host via /oldroot, writing attacker-chosen paths outside the sandbox as     the launching user. This happens before the sandboxed process starts. This issue is GHSA-pxhw-h44j-8pfx.
    It is fixed in bubblewrap 0.12.0.

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

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.

  - A flaw was found in bubblewrap. During sandbox setup, creating files or directories under the new root can     follow a parent symlink onto the host via /oldroot, writing attacker-chosen paths outside the sandbox as     the launching user. This happens before the sandboxed process starts. This issue is GHSA-pxhw-h44j-8pfx.
    It is fixed in bubblewrap 0.12.0. (CVE-2026-87766)

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

ID	Name	Product	Family	Type	Severity
351072	Amazon Linux 2023 : bubblewrap (ALAS2023-2026-3105)	Nessus	Amazon Linux Local Security Checks	Local	high
349549	TencentOS Server 4: bubblewrap (TSSA-2026:1022)	Nessus	Tencent Local Security Checks	Local	high
344234	Linux Distros Unpatched Vulnerability : CVE-2026-87766	Nessus	Misc.	Local	high

Detections

Analytics

CVE-2026-87766

high

Tenable Plugins

high

high

high