Critical9.0Vendor: HighRed Hat & Ubuntu Linux
Arbitrary code execution via crafted symlinks in sandbox-expose options
CVE-2026-34078 Published Apr 7, 2026
CVE-2026-34078
Affected products & platforms
Red Hat & Ubuntu LinuxUnclassified
Summary
Arbitrary code execution via crafted symlinks in sandbox-expose options. Red Hat rates this important (CVSS 9). Weakness: CWE-59. Affected package(s): flatpak. Resolved in Red Hat advisory RHSA-2026:21757 — update the affected packages (`sudo dnf update`).
Affected versions
- flatpak-0:1.12.9-4.el8_10
- flatpak-0:1.16.0-9.el10_2.1
- flatpak-0:1.12.9-3.el7_9
- flatpak-0:1.12.9-1.el8_6
- flatpak-0:1.12.9-2.el8_4
- flatpak-0:1.12.9-1.el8_8
- flatpak-0:1.12.7-5.el9_2.1
- flatpak-0:1.16.0-5.el10_0.2
- flatpak-0:1.12.9-4.el9_8.1
- flatpak-0:1.12.9-3.el9_4.1
- flatpak-0:1.12.9-4.el9_6.1
Official advisory · high-confidence parse· fetched 4 hours ago·verify at source
Fixed versions
- RHSA-2026:21757
Official advisory · high-confidence parse· fetched 4 hours ago·verify at source
Mitigation checklist
Recommended fix / mitigation
- Update the affected package(s) to the fixed version shipped in RHSA-2026:21757 (`sudo dnf update` / `yum update`).
Official advisory · high-confidence parse· fetched 4 hours ago·verify at source
Discussion(0)
No comments yet. Share field notes, upgrade gotchas, or questions — verify against the vendor advisory before acting on community advice.
Sign in to join the discussion.