CVE record · CVE-2026-86320

Flatpak-builder: host code execution via `git am` hook execution in patch source extraction (`use-git-am`)

CVSS 7.8 HighEPSS 0.0030 · 22nd percentile

Published by the CVE Program (CNA: redhat) at 17 Sept 2026, 07:27 UTC. agentprime has not analysed this yet, so whether it affects any app is not known. This CVE names a vendor and product rather than a package, so the lockfile check doesn’t match it.

Affected products, as the CNA wrote them
Vendor	Product	Versions
Red Hat	Red Hat Enterprise Linux 10 Package name: flatpak-builder https://access.redhat.com/downloads/content/package-browser/	unaffected 0:1.4.4-1.el10_2.1 to before * rpm Other versions: affected
Red Hat	Red Hat Enterprise Linux 10.0 Extended Update Support Package name: flatpak-builder https://access.redhat.com/downloads/content/package-browser/	unaffected 0:1.4.4-1.el10_0.1 to before * rpm Other versions: affected
Red Hat	Red Hat Enterprise Linux 8 Package name: flatpak-builder https://access.redhat.com/downloads/content/package-browser/	unaffected 0:1.2.3-2.el8_10 to before * rpm Other versions: affected
Red Hat	Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support Package name: flatpak-builder https://access.redhat.com/downloads/content/package-browser/	unaffected 0:1.0.9-4.el8_4 to before * rpm Other versions: affected
Red Hat	Red Hat Enterprise Linux 8.4 Extended Update Support Long-Life Add-On Package name: flatpak-builder https://access.redhat.com/downloads/content/package-browser/	unaffected 0:1.0.9-4.el8_4 to before * rpm Other versions: affected
Red Hat	Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support Package name: flatpak-builder https://access.redhat.com/downloads/content/package-browser/	unaffected 0:1.0.9-4.el8_6 to before * rpm Other versions: affected
Red Hat	Red Hat Enterprise Linux 8.6 Extended Update Support Long-Life Add-On Package name: flatpak-builder https://access.redhat.com/downloads/content/package-browser/	unaffected 0:1.0.9-4.el8_6 to before * rpm Other versions: affected
Red Hat	Red Hat Enterprise Linux 8.8 Telecommunications Update Service Package name: flatpak-builder https://access.redhat.com/downloads/content/package-browser/	unaffected 0:1.0.14-3.el8_8 to before * rpm Other versions: affected
Red Hat	Red Hat Enterprise Linux 8.8 Update Services for SAP Solutions Package name: flatpak-builder https://access.redhat.com/downloads/content/package-browser/	unaffected 0:1.0.14-3.el8_8 to before * rpm Other versions: affected
Red Hat	Red Hat Enterprise Linux 9 Package name: flatpak-builder https://access.redhat.com/downloads/content/package-browser/	unaffected 0:1.2.3-1.el9_8.1 to before * rpm Other versions: affected
Red Hat	Red Hat Enterprise Linux 9.2 Update Services for SAP Solutions Package name: flatpak-builder https://access.redhat.com/downloads/content/package-browser/	unaffected 0:1.2.2-2.el9_2 to before * rpm Other versions: affected
Red Hat	Red Hat Enterprise Linux 9.4 Update Services for SAP Solutions Package name: flatpak-builder https://access.redhat.com/downloads/content/package-browser/	unaffected 0:1.2.3-2.el9_4 to before * rpm Other versions: affected
Red Hat	Red Hat Enterprise Linux 9.6 Extended Update Support Package name: flatpak-builder https://access.redhat.com/downloads/content/package-browser/	unaffected 0:1.2.3-1.el9_6.1 to before * rpm Other versions: affected

Identifiers: CVE-2026-86320
CNA: redhat
Weakness (CWE): CWE-94
Tags: Red Hat Enterprise Linux 10
Red Hat Enterprise Linux 10.0 Extended Update Support
Red Hat Enterprise Linux 8
Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support
Red Hat Enterprise Linux 8.4 Extended Update Support Long-Life Add-On
Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support
Red Hat Enterprise Linux 8.6 Extended Update Support Long-Life Add-On
Red Hat Enterprise Linux 8.8 Telecommunications Update Service
Code injection
Published: 17 Sept 2026
Updated: 3 Nov 2026

Not analysed yet

We haven’t published our own analysis of this CVE. If a person reviews it, this page will say what’s affected and what has to be true for it to matter.

Severity and exploitation

Score	Rating	CVSS	Vector	Source
7.8	High	3.1	CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H	CNA (redhat)

CISA KEV Not listed.
EPSS 0.0030, the 22nd percentile, on 5 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

Timeline

17 Sept 2026, 07:27 UTC Confirmed by the CVE List

Sources

References from the CNA

access.redhat.com/errata/RHSA-2026:80495 vendor-advisoryredhat
access.redhat.com/errata/RHSA-2026:80496 vendor-advisoryredhat
access.redhat.com/errata/RHSA-2026:80973 vendor-advisoryredhat
access.redhat.com/errata/RHSA-2026:84832 vendor-advisoryredhat
access.redhat.com/errata/RHSA-2026:84833 vendor-advisoryredhat
access.redhat.com/errata/RHSA-2026:84834 vendor-advisoryredhat
access.redhat.com/errata/RHSA-2026:84842 vendor-advisoryredhat
access.redhat.com/errata/RHSA-2026:86714 vendor-advisoryredhat
access.redhat.com/errata/RHSA-2026:90896 vendor-advisoryredhat
access.redhat.com/errata/RHSA-2026:92220 vendor-advisoryredhat
access.redhat.com/security/cve/CVE-2026-86320 vdb-entryredhat
bugzilla.redhat.com/show_bug.cgi?id=2471023 issue-trackingredhat
github.com/flatpak/flatpak-builder/security/advisories/GHSA-j5p8-jgjc-f3xv

Facts on this page come from the CVE List as the CNA published them, with CVSS from the sources named above, CISA KEV and FIRST EPSS. Vendors, products and versions are shown as the CNA wrote them. We don’t reproduce the CVE’s description.