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CVE-2026-86320

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

CVSS 3.1 7.8 HIGHCheck source for fixed versionsKEV status unknown
Original advisory

Historical advisory recorded 11 Nov 2026 13:57:25 UTC. Read the latest advisory.

cve-program · CVE-2026-86320

Published

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.

Read the publisher's advisory

Affected versions, risk and source history

cve-program · CVE-2026-86320

Published

flatpak-builder

https://access.redhat.com/downloads/content/package-browser/

Publisher's version information

Shown as published. These rules are not interpreted as NuGet package version ranges.

{
                    "vendor": "Red Hat",
                    "product": "Red Hat Enterprise Linux 10",
                    "collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
                    "packageName": "flatpak-builder",
                    "defaultStatus": "affected",
                    "versions": [
                        {
                            "version": "0:1.4.4-1.el10_2.1",
                            "lessThan": "*",
                            "versionType": "rpm",
                            "status": "unaffected"
                        }
                    ],
                    "cpes": [
                        "cpe:/o:redhat:enterprise_linux:10.2"
                    ]
                }

flatpak-builder

https://access.redhat.com/downloads/content/package-browser/

Publisher's version information

Shown as published. These rules are not interpreted as NuGet package version ranges.

{
                    "vendor": "Red Hat",
                    "product": "Red Hat Enterprise Linux 10.0 Extended Update Support",
                    "collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
                    "packageName": "flatpak-builder",
                    "defaultStatus": "affected",
                    "versions": [
                        {
                            "version": "0:1.4.4-1.el10_0.1",
                            "lessThan": "*",
                            "versionType": "rpm",
                            "status": "unaffected"
                        }
                    ],
                    "cpes": [
                        "cpe:/o:redhat:enterprise_linux_eus:10.0"
                    ]
                }

flatpak-builder

https://access.redhat.com/downloads/content/package-browser/

Publisher's version information

Shown as published. These rules are not interpreted as NuGet package version ranges.

{
                    "vendor": "Red Hat",
                    "product": "Red Hat Enterprise Linux 8",
                    "collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
                    "packageName": "flatpak-builder",
                    "defaultStatus": "affected",
                    "versions": [
                        {
                            "version": "0:1.2.3-2.el8_10",
                            "lessThan": "*",
                            "versionType": "rpm",
                            "status": "unaffected"
                        }
                    ],
                    "cpes": [
                        "cpe:/a:redhat:enterprise_linux:8::appstream"
                    ]
                }

flatpak-builder

https://access.redhat.com/downloads/content/package-browser/

Publisher's version information

Shown as published. These rules are not interpreted as NuGet package version ranges.

{
                    "vendor": "Red Hat",
                    "product": "Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support",
                    "collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
                    "packageName": "flatpak-builder",
                    "defaultStatus": "affected",
                    "versions": [
                        {
                            "version": "0:1.0.9-4.el8_4",
                            "lessThan": "*",
                            "versionType": "rpm",
                            "status": "unaffected"
                        }
                    ],
                    "cpes": [
                        "cpe:/a:redhat:rhel_aus:8.4::appstream",
                        "cpe:/a:redhat:rhel_eus_long_life:8.4::appstream"
                    ]
                }

flatpak-builder

https://access.redhat.com/downloads/content/package-browser/

Publisher's version information

Shown as published. These rules are not interpreted as NuGet package version ranges.

{
                    "vendor": "Red Hat",
                    "product": "Red Hat Enterprise Linux 8.4 Extended Update Support Long-Life Add-On",
                    "collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
                    "packageName": "flatpak-builder",
                    "defaultStatus": "affected",
                    "versions": [
                        {
                            "version": "0:1.0.9-4.el8_4",
                            "lessThan": "*",
                            "versionType": "rpm",
                            "status": "unaffected"
                        }
                    ],
                    "cpes": [
                        "cpe:/a:redhat:rhel_aus:8.4::appstream",
                        "cpe:/a:redhat:rhel_eus_long_life:8.4::appstream"
                    ]
                }

flatpak-builder

https://access.redhat.com/downloads/content/package-browser/

Publisher's version information

Shown as published. These rules are not interpreted as NuGet package version ranges.

{
                    "vendor": "Red Hat",
                    "product": "Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support",
                    "collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
                    "packageName": "flatpak-builder",
                    "defaultStatus": "affected",
                    "versions": [
                        {
                            "version": "0:1.0.9-4.el8_6",
                            "lessThan": "*",
                            "versionType": "rpm",
                            "status": "unaffected"
                        }
                    ],
                    "cpes": [
                        "cpe:/a:redhat:rhel_aus:8.6::appstream",
                        "cpe:/a:redhat:rhel_eus_long_life:8.6::appstream"
                    ]
                }

flatpak-builder

https://access.redhat.com/downloads/content/package-browser/

Publisher's version information

Shown as published. These rules are not interpreted as NuGet package version ranges.

{
                    "vendor": "Red Hat",
                    "product": "Red Hat Enterprise Linux 8.6 Extended Update Support Long-Life Add-On",
                    "collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
                    "packageName": "flatpak-builder",
                    "defaultStatus": "affected",
                    "versions": [
                        {
                            "version": "0:1.0.9-4.el8_6",
                            "lessThan": "*",
                            "versionType": "rpm",
                            "status": "unaffected"
                        }
                    ],
                    "cpes": [
                        "cpe:/a:redhat:rhel_aus:8.6::appstream",
                        "cpe:/a:redhat:rhel_eus_long_life:8.6::appstream"
                    ]
                }

flatpak-builder

https://access.redhat.com/downloads/content/package-browser/

Publisher's version information

Shown as published. These rules are not interpreted as NuGet package version ranges.

{
                    "vendor": "Red Hat",
                    "product": "Red Hat Enterprise Linux 8.8 Telecommunications Update Service",
                    "collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
                    "packageName": "flatpak-builder",
                    "defaultStatus": "affected",
                    "versions": [
                        {
                            "version": "0:1.0.14-3.el8_8",
                            "lessThan": "*",
                            "versionType": "rpm",
                            "status": "unaffected"
                        }
                    ],
                    "cpes": [
                        "cpe:/a:redhat:rhel_e4s:8.8::appstream",
                        "cpe:/a:redhat:rhel_tus:8.8::appstream"
                    ]
                }

flatpak-builder

https://access.redhat.com/downloads/content/package-browser/

Publisher's version information

Shown as published. These rules are not interpreted as NuGet package version ranges.

{
                    "vendor": "Red Hat",
                    "product": "Red Hat Enterprise Linux 8.8 Update Services for SAP Solutions",
                    "collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
                    "packageName": "flatpak-builder",
                    "defaultStatus": "affected",
                    "versions": [
                        {
                            "version": "0:1.0.14-3.el8_8",
                            "lessThan": "*",
                            "versionType": "rpm",
                            "status": "unaffected"
                        }
                    ],
                    "cpes": [
                        "cpe:/a:redhat:rhel_e4s:8.8::appstream",
                        "cpe:/a:redhat:rhel_tus:8.8::appstream"
                    ]
                }

flatpak-builder

https://access.redhat.com/downloads/content/package-browser/

Publisher's version information

Shown as published. These rules are not interpreted as NuGet package version ranges.

{
                    "vendor": "Red Hat",
                    "product": "Red Hat Enterprise Linux 9",
                    "collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
                    "packageName": "flatpak-builder",
                    "defaultStatus": "affected",
                    "versions": [
                        {
                            "version": "0:1.2.3-1.el9_8.1",
                            "lessThan": "*",
                            "versionType": "rpm",
                            "status": "unaffected"
                        }
                    ],
                    "cpes": [
                        "cpe:/a:redhat:enterprise_linux:9::appstream"
                    ]
                }

flatpak-builder

https://access.redhat.com/downloads/content/package-browser/

Publisher's version information

Shown as published. These rules are not interpreted as NuGet package version ranges.

{
                    "vendor": "Red Hat",
                    "product": "Red Hat Enterprise Linux 9",
                    "collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
                    "packageName": "flatpak-builder",
                    "defaultStatus": "affected",
                    "versions": [
                        {
                            "version": "0:1.2.3-1.el9_9.1",
                            "lessThan": "*",
                            "versionType": "rpm",
                            "status": "unaffected"
                        }
                    ],
                    "cpes": [
                        "cpe:/a:redhat:enterprise_linux:9::appstream"
                    ]
                }

flatpak-builder

https://access.redhat.com/downloads/content/package-browser/

Publisher's version information

Shown as published. These rules are not interpreted as NuGet package version ranges.

{
                    "vendor": "Red Hat",
                    "product": "Red Hat Enterprise Linux 9.2 Update Services for SAP Solutions",
                    "collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
                    "packageName": "flatpak-builder",
                    "defaultStatus": "affected",
                    "versions": [
                        {
                            "version": "0:1.2.2-2.el9_2",
                            "lessThan": "*",
                            "versionType": "rpm",
                            "status": "unaffected"
                        }
                    ],
                    "cpes": [
                        "cpe:/a:redhat:rhel_e4s:9.2::appstream"
                    ]
                }

flatpak-builder

https://access.redhat.com/downloads/content/package-browser/

Publisher's version information

Shown as published. These rules are not interpreted as NuGet package version ranges.

{
                    "vendor": "Red Hat",
                    "product": "Red Hat Enterprise Linux 9.4 Update Services for SAP Solutions",
                    "collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
                    "packageName": "flatpak-builder",
                    "defaultStatus": "affected",
                    "versions": [
                        {
                            "version": "0:1.2.3-2.el9_4",
                            "lessThan": "*",
                            "versionType": "rpm",
                            "status": "unaffected"
                        }
                    ],
                    "cpes": [
                        "cpe:/a:redhat:rhel_e4s:9.4::appstream"
                    ]
                }

flatpak-builder

https://access.redhat.com/downloads/content/package-browser/

Publisher's version information

Shown as published. These rules are not interpreted as NuGet package version ranges.

{
                    "vendor": "Red Hat",
                    "product": "Red Hat Enterprise Linux 9.6 Extended Update Support",
                    "collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
                    "packageName": "flatpak-builder",
                    "defaultStatus": "affected",
                    "versions": [
                        {
                            "version": "0:1.2.3-1.el9_6.1",
                            "lessThan": "*",
                            "versionType": "rpm",
                            "status": "unaffected"
                        }
                    ],
                    "cpes": [
                        "cpe:/a:redhat:rhel_eus:9.6::appstream"
                    ]
                }

Original source record · Cite this exact observation · Complete original publisher JSON

ChangeIntel

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