Read the docs
TI-2026-59102 Aliases CVE-2026-86320GHSA-rvpr-5p35-6vf8

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

Priority HIGH 69CWE-94Published · Updated

Key facts

Attack vector
Local
Privileges required
None
User interaction
Required
Attack complexity
Low
Impact type
Code execution
Confidentiality · integrity · availability
High · High · High
Fix status
Fixed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA and Red Hat. Impact type from CWE-94.

Summary

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.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.00299 22nd percentileScored 2026-11-07
Fix Fixed Red Hat: 10 advisories

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
Poc
Automatable
No
Technical impact
Total

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
Red HatRed Hat Enterprise Linux 10—1.4.4-1.el10_2.1Patch availableCNA
Red HatRed Hat Enterprise Linux 10.0 Extended Update Support—1.4.4-1.el10_0.1Patch availableCNA
Red HatRed Hat Enterprise Linux 8—1.2.3-2.el8_10Patch availableCNA
Red HatRed Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support—1.0.9-4.el8_4Patch availableCNA
Red HatRed Hat Enterprise Linux 8.4 Extended Update Support Long-Life Add-On—1.0.9-4.el8_4Patch availableCNA
Red HatRed Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support—1.0.9-4.el8_6Patch availableCNA
Red HatRed Hat Enterprise Linux 8.6 Extended Update Support Long-Life Add-On—1.0.9-4.el8_6Patch availableCNA
Red HatRed Hat Enterprise Linux 8.8 Telecommunications Update Service—1.0.14-3.el8_8Patch availableCNA
Red HatRed Hat Enterprise Linux 8.8 Update Services for SAP Solutions—1.0.14-3.el8_8Patch availableCNA
Red HatRed Hat Enterprise Linux 9—1.2.3-1.el9_8.1Patch availableCNA
Red HatRed Hat Enterprise Linux 9.2 Update Services for SAP Solutions—1.2.2-2.el9_2Patch availableCNA
Red HatRed Hat Enterprise Linux 9.4 Update Services for SAP Solutions—1.2.3-2.el9_4Patch availableCNA
Red HatRed Hat Enterprise Linux 9.6 Extended Update Support—1.2.3-1.el9_6.1Patch availableCNA
  • Red Hat Enterprise Linux 10 VendorRed Hat Affected — Fixed in 1.4.4-1.el10_2.1 Patch available CNA
  • Red Hat Enterprise Linux 10.0 Extended Update Support VendorRed Hat Affected — Fixed in 1.4.4-1.el10_0.1 Patch available CNA
  • Red Hat Enterprise Linux 8 VendorRed Hat Affected — Fixed in 1.2.3-2.el8_10 Patch available CNA
  • Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support VendorRed Hat Affected — Fixed in 1.0.9-4.el8_4 Patch available CNA
  • Red Hat Enterprise Linux 8.4 Extended Update Support Long-Life Add-On VendorRed Hat Affected — Fixed in 1.0.9-4.el8_4 Patch available CNA
  • Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support VendorRed Hat Affected — Fixed in 1.0.9-4.el8_6 Patch available CNA
  • Red Hat Enterprise Linux 8.6 Extended Update Support Long-Life Add-On VendorRed Hat Affected — Fixed in 1.0.9-4.el8_6 Patch available CNA
  • Red Hat Enterprise Linux 8.8 Telecommunications Update Service VendorRed Hat Affected — Fixed in 1.0.14-3.el8_8 Patch available CNA
  • Red Hat Enterprise Linux 8.8 Update Services for SAP Solutions VendorRed Hat Affected — Fixed in 1.0.14-3.el8_8 Patch available CNA
  • Red Hat Enterprise Linux 9 VendorRed Hat Affected — Fixed in 1.2.3-1.el9_8.1 Patch available CNA
  • Red Hat Enterprise Linux 9.2 Update Services for SAP Solutions VendorRed Hat Affected — Fixed in 1.2.2-2.el9_2 Patch available CNA
  • Red Hat Enterprise Linux 9.4 Update Services for SAP Solutions VendorRed Hat Affected — Fixed in 1.2.3-2.el9_4 Patch available CNA
  • Red Hat Enterprise Linux 9.6 Extended Update Support VendorRed Hat Affected — Fixed in 1.2.3-1.el9_6.1 Patch available CNA

CPE names CNA · 13

CPEVersionsRoleVendor
cpe:/o:redhat:enterprise_linux:10.210.2—Red Hat
cpe:/o:redhat:enterprise_linux_eus:10.010.0—Red Hat
cpe:/a:redhat:enterprise_linux:8::appstream8—Red Hat
cpe:/a:redhat:rhel_aus:8.4::appstream8.4—Red Hat
cpe:/a:redhat:rhel_eus_long_life:8.4::appstream8.4—Red Hat
cpe:/a:redhat:rhel_aus:8.6::appstream8.6—Red Hat
cpe:/a:redhat:rhel_eus_long_life:8.6::appstream8.6—Red Hat
cpe:/a:redhat:rhel_e4s:8.8::appstream8.8—Red Hat
cpe:/a:redhat:rhel_tus:8.8::appstream8.8—Red Hat
cpe:/a:redhat:enterprise_linux:9::appstream9—Red Hat
  • cpe:/o:redhat:enterprise_linux:10.2 Versions 10.2 — ·Red Hat
  • cpe:/o:redhat:enterprise_linux_eus:10.0 Versions 10.0 — ·Red Hat
  • cpe:/a:redhat:enterprise_linux:8::appstream Versions 8 — ·Red Hat
  • cpe:/a:redhat:rhel_aus:8.4::appstream Versions 8.4 — ·Red Hat
  • cpe:/a:redhat:rhel_eus_long_life:8.4::appstream Versions 8.4 — ·Red Hat
  • cpe:/a:redhat:rhel_aus:8.6::appstream Versions 8.6 — ·Red Hat
  • cpe:/a:redhat:rhel_eus_long_life:8.6::appstream Versions 8.6 — ·Red Hat
  • cpe:/a:redhat:rhel_e4s:8.8::appstream Versions 8.8 — ·Red Hat
  • cpe:/a:redhat:rhel_tus:8.8::appstream Versions 8.8 — ·Red Hat
  • cpe:/a:redhat:enterprise_linux:9::appstream Versions 9 — ·Red Hat
Show 3 more CPE
CPEVersionsRoleVendor
cpe:/a:redhat:rhel_e4s:9.2::appstream9.2—Red Hat
cpe:/a:redhat:rhel_e4s:9.4::appstream9.4—Red Hat
cpe:/a:redhat:rhel_eus:9.6::appstream9.6—Red Hat
  • cpe:/a:redhat:rhel_e4s:9.2::appstream Versions 9.2 — ·Red Hat
  • cpe:/a:redhat:rhel_e4s:9.4::appstream Versions 9.4 — ·Red Hat
  • cpe:/a:redhat:rhel_eus:9.6::appstream Versions 9.6 — ·Red Hat

Remediation

Red Hat 10 advisories

  • RHSA-2026:92220 Released 2026-10-29 · Red Hat rating Important
    flatpak-builder security update
    • Red Hat Enterprise Linux AppStream AUS (v.8.4) flatpak-builder-1.0.9-4.el8_4
    • Red Hat Enterprise Linux AppStream EUS EXTENSION (v.8.4) flatpak-builder-1.0.9-4.el8_4
  • RHSA-2026:90896 Released 2026-10-27 · Red Hat rating Important
    flatpak-builder security update
    • Red Hat Enterprise Linux AppStream AUS (v.8.6) flatpak-builder-1.0.9-4.el8_6
    • Red Hat Enterprise Linux AppStream EUS EXTENSION (v.8.6) flatpak-builder-1.0.9-4.el8_6
  • RHSA-2026:86714 Released 2026-10-21 · Red Hat rating Important
    flatpak-builder security update
    • Red Hat Enterprise Linux AppStream E4S (v.8.8) flatpak-builder-1.0.14-3.el8_8
    • Red Hat Enterprise Linux AppStream TUS (v.8.8) flatpak-builder-1.0.14-3.el8_8
Show 7 more Red Hat advisories
  • RHSA-2026:84833 Released 2026-10-19 · Red Hat rating Important
    flatpak-builder security update
    • Red Hat Enterprise Linux AppStream EUS (v.9.6) flatpak-builder-1.2.3-1.el9_6.1
  • RHSA-2026:84842 Released 2026-10-19 · Red Hat rating Important
    flatpak-builder security update
    • Red Hat Enterprise Linux AppStream E4S (v.9.2) flatpak-builder-1.2.2-2.el9_2
  • RHSA-2026:84832 Released 2026-10-19 · Red Hat rating Important
    flatpak-builder security update
    • Red Hat Enterprise Linux AppStream E4S (v.9.4) flatpak-builder-1.2.3-2.el9_4
  • RHSA-2026:84834 Released 2026-10-19 · Red Hat rating Important
    flatpak-builder security update
    • Red Hat Enterprise Linux AppStream EUS (v. 10.0) flatpak-builder-1.4.4-1.el10_0.1
  • RHSA-2026:80973 Released 2026-10-12 · Red Hat rating Important
    flatpak-builder security update
    • Red Hat Enterprise Linux AppStream (v. 8) flatpak-builder-1.2.3-2.el8_10
  • RHSA-2026:80496 Released 2026-10-12 · Red Hat rating Important
    flatpak-builder security update
    • Red Hat Enterprise Linux AppStream (v. 9) flatpak-builder-1.2.3-1.el9_8.1
  • RHSA-2026:80495 Released 2026-10-12 · Red Hat rating Important
    flatpak-builder security update
    • Red Hat Enterprise Linux AppStream (v. 10) flatpak-builder-1.4.4-1.el10_2.1

Vendor assessments

Red Hat

Red Hat rating: Important. Red Hat's page for this CVE →

ProductStatusPlan or fix
Red Hat Enterprise Linux AppStream (v. 10)Fixed RHSA-2026:80495
Red Hat Enterprise Linux AppStream (v. 8)Fixed RHSA-2026:80973
Red Hat Enterprise Linux AppStream (v. 9)Fixed RHSA-2026:80496
Red Hat Enterprise Linux AppStream AUS (v.8.4)Fixed RHSA-2026:92220
Red Hat Enterprise Linux AppStream AUS (v.8.6)Fixed RHSA-2026:90896
Red Hat Enterprise Linux AppStream E4S (v.8.8)Fixed RHSA-2026:86714
Red Hat Enterprise Linux AppStream E4S (v.9.2)Fixed RHSA-2026:84842
Red Hat Enterprise Linux AppStream E4S (v.9.4)Fixed RHSA-2026:84832
Red Hat Enterprise Linux AppStream EUS (v. 10.0)Fixed RHSA-2026:84834
Red Hat Enterprise Linux AppStream EUS (v.9.6)Fixed RHSA-2026:84833
Red Hat Enterprise Linux AppStream EUS EXTENSION (v.8.4)Fixed RHSA-2026:92220
Red Hat Enterprise Linux AppStream EUS EXTENSION (v.8.6)Fixed RHSA-2026:90896
Red Hat Enterprise Linux AppStream TUS (v.8.8)Fixed RHSA-2026:86714

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-86320
  2. 2026-10-03 Alias added: GHSA-rvpr-5p35-6vf8
  3. 2026-10-12 Fix available: flatpak-builder@0:1.2.3-1.el9_8.1, flatpak-builder@0:1.4.4-1.el10_2.1 · CNA
  4. 2026-10-12 2 new references · CNA
  5. 2026-10-12 Fix available: RHSA-2026:80495 · Red Hat
  6. 2026-10-12 Fix available: RHSA-2026:80496 · Red Hat
  7. 2026-10-12 Fix available: Red Hat Enterprise Linux AppStream (v. 10), Red Hat Enterprise Linux AppStream (v. 9) · Red Hat
  8. 2026-10-12 Fix available: flatpak-builder@0:1.2.3-2.el8_10 · CNA
  9. 2026-10-12 1 new reference · CNA
  10. 2026-10-13 Fix available: RHSA-2026:80973 · Red Hat
  11. 2026-10-13 Fix available: Red Hat Enterprise Linux AppStream (v. 8) · Red Hat
  12. 2026-10-19 Fix available: flatpak-builder@0:1.2.2-2.el9_2, flatpak-builder@0:1.2.3-1.el9_6.1, flatpak-builder@0:1.2.3-2.el9_4 +1 · CNA
  13. 2026-10-19 4 new references · CNA
  14. 2026-10-20 Fix available: RHSA-2026:84842 · Red Hat
  15. 2026-10-20 Fix available: RHSA-2026:84833 · Red Hat
  16. 2026-10-20 Fix available: RHSA-2026:84834 · Red Hat
  17. 2026-10-20 Fix available: RHSA-2026:84832 · Red Hat
  18. 2026-10-20 Fix available: Red Hat Enterprise Linux AppStream E4S (v.9.2), Red Hat Enterprise Linux AppStream E4S (v.9.4), Red Hat Enterprise Linux AppStream EUS (v. 10.0) +1 · Red Hat
  19. 2026-10-21 Fix available: flatpak-builder@0:1.0.14-3.el8_8 · CNA
  20. 2026-10-21 1 new reference · CNA
  21. 2026-10-21 Fix available: RHSA-2026:86714 · Red Hat
  22. 2026-10-21 Fix available: Red Hat Enterprise Linux AppStream E4S (v.8.8), Red Hat Enterprise Linux AppStream TUS (v.8.8) · Red Hat
  23. 2026-10-28 Fix available: flatpak-builder@0:1.0.9-4.el8_6 · CNA
  24. 2026-10-28 1 new reference · CNA
  25. 2026-10-29 Fix available: RHSA-2026:90896 · Red Hat
  26. 2026-10-29 Fix available: Red Hat Enterprise Linux AppStream AUS (v.8.6), Red Hat Enterprise Linux AppStream EUS EXTENSION (v.8.6) · Red Hat
  27. 2026-10-30 Fix available: Red Hat Enterprise Linux AppStream AUS (v.8.4), Red Hat Enterprise Linux AppStream EUS EXTENSION (v.8.4) · Red Hat
  28. 2026-10-30 Fix available: flatpak-builder@0:1.0.9-4.el8_4 · CNA
  29. 2026-10-30 1 new reference · CNA
  30. 2026-10-30 Fix available: RHSA-2026:92220 · Red Hat

References

Advisory 10

Other 3

  • TI-2019-15875 Protection mechanism failure in Jenkins Pipeline: Groovy Plugin KEVCVSS 3.1CRITICAL 9.9
  • TI-2019-15874 Protection mechanism failure in Jenkins Script Security Plugin KEVCVSS 3.1CRITICAL 9.9
  • TI-2019-08259 Underflow in PHP-FPM can lead to RCE KEVCVSS 3.1CRITICAL 9.8
  • TI-2019-05363 Code injection in Elastic Kibana KEVCVSS 3.1CRITICAL 10.0
  • TI-2019-03949 Out-of-bounds write in ESXi and Horizon DaaS KEVCVSS 3.1CRITICAL 9.8
  • TI-2018-16080 A code execution vulnerability exists in the Stapler web framework used by Jenkins 2.153… KEVCVSS 3.1CRITICAL 9.8
See all 7413 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences