A malicious or compromised Flatpak repository can write attacker-controlled content to arbitrary locations on the host filesystem via ext…
CVE-2026-96275 · EUVD-2026-85342 · published 23 Sept 2026
How serious is it
- Severity: high, CVSS score 8.8 out of 10.
- No exploit prediction (EPSS) score yet.
- Not on the CISA list of exploited vulnerabilities.
- No public exploit in Exploit-DB.
Is your app affected by CVE-2026-96275?
Paste this prompt into Claude Code, Cursor or any AI coding tool: it runs a free Shippable scan of your project and fixes what it finds. Built with Lovable, Bolt or v0? Scan your live app. Or upload your package file.
Who is affected
- Red Hat Red Hat Enterprise Linux 10: patch: 0:1.16.0-9.el10_2.4
- Red Hat Red Hat Enterprise Linux 9.6 Extended Update Support: patch: 0:1.12.9-4.el9_6.5
- Red Hat Red Hat Enterprise Linux 8: patch: 0:1.12.9-7.el8_10
- Red Hat Red Hat Enterprise Linux 9: patch: 0:1.12.9-4.el9_8.4
- Red Hat Red Hat Enterprise Linux 9.4 Update Services for SAP Solutions: patch: 0:1.12.9-3.el9_4.5
How to check
- Find out whether you run the affected product and which version, then compare it with the versions above.
How to fix
Copies a prompt for Claude Code, Cursor or Codex that asks it to check whether you run this product.
- Apply the vendor's update or mitigation from the references below. If there is none yet, limit exposure of the affected service until there is.
- If a vulnerable version was live, check your logs and rotate the secrets that server could read.
The advisory
A malicious or compromised Flatpak repository can write attacker-controlled content to arbitrary locations on the host filesystem via extract_extra_data(). On system installs, the write happens as root. Two issues combine: `files/extra` is resolved via path operations that follow symlinks, and blob names from `xa.extra-data-sources` are not sanitized against `..` traversal.
Check your whole app
Dependencies are only half of it. Free and read-only: before you push, run npx shippable-dev scan localhost:3000 in your project folder, no account needed. For your live app, you prove it's yours with a one-line tag first.
References
- access.redhat.com/errata/RHSA-2026:80497
- access.redhat.com/errata/RHSA-2026:80498
- access.redhat.com/errata/RHSA-2026:80687
- access.redhat.com/errata/RHSA-2026:89733
- access.redhat.com/security/cve/CVE-2026-96275
- bugzilla.redhat.com/show_bug.cgi?id=2539416
- github.com/flatpak/flatpak/security/advisories/GHSA-fqx6-vh4p-42cg
- access.redhat.com/errata/RHSA-2026:90364
Merged from ENISA EUVD. Last updated 27 Oct 2026. All vulnerabilities · RSS · JSON