---
title: "CVE-2026-96280: Flatpak - Remote Code Execution"
description: "Flatpak contains a heap buffer overflow caused by size misinterpretation between 64-bit and 32-bit types in OCI delta stream parser, letting attackers controlling OCI registry achieve code execution on 32-bit systems, exploit requires attacker control of OCI registry."
url: https://panop.io/threat-heartbeat/CVE-2026-96280/
---

# CVE-2026-96280 Flatpak - Remote Code Execution

Flatpak contains a heap buffer overflow caused by size misinterpretation between 64-bit and 32-bit types in OCI delta stream parser, letting attackers controlling OCI registry achieve code execution on 32-bit systems, exploit requires attacker control of OCI registry.

CVSS base score 7.5 /10

High

CISA KEV

Not listed

Public exploit

None known

EPSS

0.66% chance of exploitation in 30 days

[View the NVD record ↗](https://nvd.nist.gov/vuln/detail/CVE-2026-96280)

## Details

Type

Remote Code Execution

Impact

Remote Code Execution

CVSS vector

CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H

Published

27 September 2026

Updated

15 October 2026

Weakness

[CWE-197](https://cwe.mitre.org/data/definitions/197.html)

## Vendor fix

Update to the latest Flatpak version with the fix applied.

Patching closes this CVE. It does not tell you which of your systems run the affected version, or what else is exposed alongside them.

## References

- [https://nvd.nist.gov/vuln/detail/CVE-2026-96280](https://nvd.nist.gov/vuln/detail/CVE-2026-96280)
- [https://access.redhat.com/security/cve/CVE-2026-96280](https://access.redhat.com/security/cve/CVE-2026-96280)
- [https://bugzilla.redhat.com/show\_bug.cgi?id=2539419](https://bugzilla.redhat.com/show_bug.cgi?id=2539419)
- [https://github.com/flatpak/flatpak/security/advisories/GHSA-jr92-2v97-wgvc](https://github.com/flatpak/flatpak/security/advisories/GHSA-jr92-2v97-wgvc)
- [https://access.redhat.com/errata/RHSA-2026:80498](https://access.redhat.com/errata/RHSA-2026:80498)
- [https://access.redhat.com/errata/RHSA-2026:80497](https://access.redhat.com/errata/RHSA-2026:80497)
- [https://access.redhat.com/errata/RHSA-2026:80687](https://access.redhat.com/errata/RHSA-2026:80687)

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## What this record can't tell you

- Whether you run the affected software, and where
- Whether an attacker can actually reach and exploit it
- The misconfigurations that never get a CVE number
- What it would cost the business, ranked into what to fix first

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