Goal Reached Thanks to every supporter — we hit 100%!

Goal: 1000 CNY · Raised: 1359 CNY

100%

Buy Us a Coffee

CVE-2026-86320— Flatpak-builder: host code execution via `git am` hook execution in patch source extraction (`use-git-am`)

Quick assessment

Affected

Red Hat Red Hat Enterprise Linux 10

Exploitation

No confirmed in-the-wild exploitation; assess based on exposure

Recommended action

Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

在 flatpak-builder 中发现了一个漏洞：当使用应用补丁源时，Git hooks（钩子）未被禁用。能够提供一个包含恶意 Git 钩子的源的攻击者，可以在构建过程中触发该钩子在主机上执行，从而以运行 flatpak-builder 的用户权限实现任意代码执行。

CVSS 7.8 · High EPSS 0.30% · P23 Updated Nov 03, 2026

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application

Affected Version Matrix 13

Vendor	Product	Version Range	Status
Red Hat	Red Hat Enterprise Linux 10	`0:1.4.4-1.el10_2.1< *`	unaffected
Red Hat	Red Hat Enterprise Linux 10.0 Extended Update Support	`0:1.4.4-1.el10_0.1< *`	unaffected
Red Hat	Red Hat Enterprise Linux 8	`0:1.2.3-2.el8_10< *`	unaffected
Red Hat	Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support	`0:1.0.9-4.el8_4< *`	unaffected
Red Hat	Red Hat Enterprise Linux 8.4 Extended Update Support Long-Life Add-On	`0:1.0.9-4.el8_4< *`	unaffected
Red Hat	Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support	`0:1.0.9-4.el8_6< *`	unaffected
Red Hat	Red Hat Enterprise Linux 8.6 Extended Update Support Long-Life Add-On	`0:1.0.9-4.el8_6< *`	unaffected
Red Hat	Red Hat Enterprise Linux 8.8 Telecommunications Update Service	`0:1.0.14-3.el8_8< *`	unaffected
Red Hat	Red Hat Enterprise Linux 8.8 Update Services for SAP Solutions	`0:1.0.14-3.el8_8< *`	unaffected
Red Hat	Red Hat Enterprise Linux 9	`0:1.2.3-1.el9_8.1< *`	unaffected
Red Hat	Red Hat Enterprise Linux 9.2 Update Services for SAP Solutions	`0:1.2.2-2.el9_2< *`	unaffected
Red Hat	Red Hat Enterprise Linux 9.4 Update Services for SAP Solutions	`0:1.2.3-2.el9_4< *`	unaffected
Red Hat	Red Hat Enterprise Linux 9.6 Extended Update Support	`0:1.2.3-1.el9_6.1< *`	unaffected

Get alerts for future matching vulnerabilities Log in to subscribe

Vulnerability Information

Have questions about the vulnerability? See if Shenlong's analysis helps!

View Shenlong Deep Dive ↗

Although we use advanced large model technology, its output may still contain inaccurate or outdated information.Shenlong tries to ensure data accuracy, but please verify and judge based on the actual situation.

Vulnerability Title

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

Source: CVE Program / CVE List V5

Vulnerability 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.

Source: CVE Program / CVE List V5

CVSS Information

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

Source: CVE Program / CVE List V5

Vulnerability Type

对生成代码的控制不恰当(代码注入)

Source: CVE Program / CVE List V5

Affected Products

Vendor	Product	Affected Versions	CPE
Red Hat	Red Hat Enterprise Linux 10	0:1.4.4-1.el10_2.1 ~ *	`cpe:/o:redhat:enterprise_linux:10.2`
Red Hat	Red Hat Enterprise Linux 10.0 Extended Update Support	0:1.4.4-1.el10_0.1 ~ *	`cpe:/o:redhat:enterprise_linux_eus:10.0`
Red Hat	Red Hat Enterprise Linux 8	0:1.2.3-2.el8_10 ~ *	`cpe:/a:redhat:enterprise_linux:8::appstream`
Red Hat	Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support	0:1.0.9-4.el8_4 ~ *	`cpe:/a:redhat:rhel_aus:8.4::appstream`
Red Hat	Red Hat Enterprise Linux 8.4 Extended Update Support Long-Life Add-On	0:1.0.9-4.el8_4 ~ *	`cpe:/a:redhat:rhel_aus:8.4::appstream`
Red Hat	Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support	0:1.0.9-4.el8_6 ~ *	`cpe:/a:redhat:rhel_aus:8.6::appstream`
Red Hat	Red Hat Enterprise Linux 8.6 Extended Update Support Long-Life Add-On	0:1.0.9-4.el8_6 ~ *	`cpe:/a:redhat:rhel_aus:8.6::appstream`
Red Hat	Red Hat Enterprise Linux 8.8 Telecommunications Update Service	0:1.0.14-3.el8_8 ~ *	`cpe:/a:redhat:rhel_e4s:8.8::appstream`
Red Hat	Red Hat Enterprise Linux 8.8 Update Services for SAP Solutions	0:1.0.14-3.el8_8 ~ *	`cpe:/a:redhat:rhel_e4s:8.8::appstream`
Red Hat	Red Hat Enterprise Linux 9	0:1.2.3-1.el9_8.1 ~ *	`cpe:/a:redhat:enterprise_linux:9::appstream`
Red Hat	Red Hat Enterprise Linux 9.2 Update Services for SAP Solutions	0:1.2.2-2.el9_2 ~ *	`cpe:/a:redhat:rhel_e4s:9.2::appstream`
Red Hat	Red Hat Enterprise Linux 9.4 Update Services for SAP Solutions	0:1.2.3-2.el9_4 ~ *	`cpe:/a:redhat:rhel_e4s:9.4::appstream`
Red Hat	Red Hat Enterprise Linux 9.6 Extended Update Support	0:1.2.3-1.el9_6.1 ~ *	`cpe:/a:redhat:rhel_eus:9.6::appstream`

II. Public POCs for CVE-2026-86320

#	POC Description	Source Link	Shenlong Link

AI-Generated POC Premium

No public POC found.

III. Intelligence Information for CVE-2026-86320

请登录查看更多情报信息。

Vendor Advisories for CVE-2026-86320 (13)

🔗 CVE-2026-86320: Arbitrary host code execution via git hooks during module source extraction · Advisory · flatpak/flatpak-builder · GitHub Read full article
🔗 CVE-2026-86320 - Red Hat Customer Portal vdb-entry x_refsource_REDHAT
🔗 2471023 – (CVE-2026-86320) CVE-2026-86320 flatpak-builder: Host code execution via `git am` hook execution in patch source extraction (`use-git-am`) Read full article issue-tracking x_refsource_REDHAT
🔗 RHSA-2026:80496 - Security Advisory - Red Hat Customer Portal vendor-advisory x_refsource_REDHAT
🔗 RHSA-2026:84834 - Security Advisory - Red Hat Customer Portal vendor-advisory x_refsource_REDHAT
🔗 RHSA-2026:80495 - Security Advisory - Red Hat Customer Portal vendor-advisory x_refsource_REDHAT
🔗 RHSA-2026:80973 - Security Advisory - Red Hat Customer Portal vendor-advisory x_refsource_REDHAT
🔗 RHSA-2026:84842 - Security Advisory - Red Hat Customer Portal vendor-advisory x_refsource_REDHAT
🔗 RHSA-2026:84833 - Security Advisory - Red Hat Customer Portal Read full article vendor-advisory x_refsource_REDHAT
🔗 RHSA-2026:90896 - Security Advisory - Red Hat Customer Portal vendor-advisory x_refsource_REDHAT
🔗 RHSA-2026:92220 - Security Advisory - Red Hat Customer Portal vendor-advisory x_refsource_REDHAT
🔗 RHSA-2026:84832 - Security Advisory - Red Hat Customer Portal vendor-advisory x_refsource_REDHAT
🔗 RHSA-2026:86714 - Security Advisory - Red Hat Customer Portal vendor-advisory x_refsource_REDHAT

https://www.cve.org/CVERecord?id=CVE-2026-86320

Same Patch Batch · Red Hat · 2026-09-17 · 8 CVEs total

CVE-2026-87742	7.5 HIGH	Quarkus-websockets-next: denial of service (oom) in quarkus-websockets-next via unbounded
CVE-2026-92925	7.1 HIGH	Redis: redis: out-of-bounds read via crafted cluster bus packets
CVE-2026-76781	5.5 MEDIUM	Libxml2: libxml2: null pointer dereference parsing nextcatalog without catalog attribute
CVE-2026-81829	5.3 MEDIUM	Smallrye-jwt: quarkus-smallrye-jwt: smallrye-jwt: unauthenticated same-origin ssrf via uns
CVE-2026-92894	4.3 MEDIUM	Rubygem-foreman_ansible: unscoped lookupvalue deletion allows cross-model override value d
CVE-2026-92893	4.3 MEDIUM	Rubygem-foreman_ansible: ansible inventory api ignores view_hosts permission filters, expo
CVE-2026-92904	4.3 MEDIUM	Rubygem-foreman_remote_execution: job output readable without object-level view_job_invoca

IV. Related Vulnerabilities

Same product: Red Hat Enterprise Linux 10

Same vendor: Red Hat

Same weakness: CWE-94