CVE-2026-86320
High
Description
A flaw was found in flatpak-builder where Git hooks are not disabled when applying patch sources with use-git-am: true. An attacker who can provide a malicious source containing a Git post-applypatch hook can cause the hook to execute on the host during the build process, resulting in arbitrary code execution with the privileges of the user running flatpak-builder.
SeverityHigh
CVSS7.8
Exploit probability—
Product
Red Hat Enterprise Linux 10
PublishedSep 17, 2026
First seenSep 17, 2026
Weakness typeCWE-94Code injection
How to fix
Vendor advisories
- access.redhat.com/errata/RHSA-2026:80495
- access.redhat.com/errata/RHSA-2026:80496
- access.redhat.com/errata/RHSA-2026:80973
- access.redhat.com/errata/RHSA-2026:84832
- access.redhat.com/errata/RHSA-2026:84833
- access.redhat.com/errata/RHSA-2026:84834
- access.redhat.com/errata/RHSA-2026:84842
- access.redhat.com/errata/RHSA-2026:86714
- access.redhat.com/errata/RHSA-2026:90896
- access.redhat.com/errata/RHSA-2026:92220
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| Red Hat Red Hat Enterprise Linux 10 | No range specified | — |
| Red Hat Red Hat Enterprise Linux 10.0 Extended Update Support | No range specified | — |
| enterprise_linux 8 | No range specified | — |
| rhel_aus 8.4 | No range specified | — |
| rhel_aus 8.6 | No range specified | — |
| rhel_e4s 8.8 | No range specified | — |
| enterprise_linux 9 | No range specified | — |
| rhel_e4s 9.2 | No range specified | — |
| rhel_e4s 9.4 | No range specified | — |
| rhel_eus 9.6 | No range specified | — |
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