CVE-2026-87766
highpriority · track · 0EPSS 0.002 · 11 %ileDEUSEPSS · scored 2026-10-27
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.
cvss
Technical severity, 0–10. One row per scoring source.
base score 0–10 · higher = more severe · hover a vector to decode
ssvc
A stakeholder decision — act, attend, or track — from exploitation and impact.
weaknesses
The CWE weakness classes this flaw belongs to.
affected products (16)
Products and version ranges known to be affected.
- Red Hat Enterprise Linux 10.0 Extended Update Supportall versionscert_bundDEcpe:/o:redhat:enterprise_linux:10.0_extended_update_support
- Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Supportall versionscert_bundDEcpe:/o:redhat:enterprise_linux:8.4_advanced_mission_critical_update_support
- Red Hat Enterprise Linux 8.4 Extended Update Support Long-Life Add-Onall versionscert_bundDEcpe:/o:redhat:enterprise_linux:8.4_extended_update_support_long-life_add-on
- Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Supportall versionscert_bundDEcpe:/o:redhat:enterprise_linux:8.6_advanced_mission_critical_update_support
- Red Hat Enterprise Linux 8.6 Extended Update Support Long-Life Add-Onall versionscert_bundDEcpe:/o:redhat:enterprise_linux:8.6_extended_update_support_long-life_add-on
- Red Hat Enterprise Linux 8.8 Telecommunications Update Serviceall versionscert_bundDEcpe:/o:redhat:enterprise_linux:8.8_telecommunications_update_service
- Red Hat Enterprise Linux 8.8 Update Services for SAP Solutionsall versionscert_bundDEcpe:/o:redhat:enterprise_linux:8.8_update_services_for_sap_solutions
- Red Hat Enterprise Linux 9.2 Update Services for SAP Solutionsall versionscert_bundDEcpe:/o:redhat:enterprise_linux:9.2_update_services_for_sap_solutions
- Red Hat Enterprise Linux 9.4 Update Services for SAP Solutionsall versionscert_bundDEcpe:/o:redhat:enterprise_linux:9.4_update_services_for_sap_solutions
- Red Hat Enterprise Linux 9.6 Extended Update Supportall versionscert_bundDEcpe:/o:redhat:enterprise_linux:9.6_extended_update_support
advisories (1)
Vendor and ecosystem advisories describing this.
- WID-SEC-W-2026-4029Red Hat Enterprise Linux (python-tornado, resteasy-core, bubblewrap, pgvector): Mehrere SchwachstellenDeutsch2026-10-19csaf · cert_bundDE
Ein Angreifer kann mehrere Schwachstellen in Red Hat Enterprise Linux ausnutzen, um Sicherheitsvorkehrungen zu umgehen, beliebigen Code auszuführen, Daten zu manipulieren und offenzulegen oder einen Denial-of-Service-Angriff auszulösen.
sources
Which sources assert this record, and when.
references (18) nvd
External citations — patches, advisories, analysis.
- http://www.openwall.com/lists/oss-security/2026/09/09/3
- http://www.openwall.com/lists/oss-security/2026/09/22/23
- https://access.redhat.com/errata/RHSA-2026:85306
- https://access.redhat.com/errata/RHSA-2026:85308
- https://access.redhat.com/errata/RHSA-2026:85309
- https://access.redhat.com/errata/RHSA-2026:85312
- https://access.redhat.com/errata/RHSA-2026:85313
- https://access.redhat.com/errata/RHSA-2026:85317
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