# Flatpak-Builder vulnerabilities

Source: https://junglewise.ai/threats/technologies/flatpak-builder  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Updated: 9 November 2026, 03:07 UTC. Rebuilt every hour.  
Data: https://junglewise.ai/threats/technologies/flatpak-builder.json  
License: CC BY 4.0 with a link back

Junglewise Threat Intelligence has tracked 3 vulnerabilities in Flatpak-Builder: 0 in the last 7 days and 2 in the last 90 days, 0 of them critical and 0 exploited in the wild. The most recent, CVE-2026-107466, was published on 8 October 2026. Nothing in the last four weeks, down from 2 vulnerabilities in the four before.

## Counts

- Last 7 days: 0
- Last 30 days: 0
- Last 90 days: 2
- All time: 3 (0 critical, 0 exploited in the wild)

## About Flatpak-Builder

Tool for building Flatpak applications from source code and project definitions.

## Latest Flatpak-Builder vulnerabilities

- [CVE-2026-107466: flatpak-builder local file disclosure via crafted manifest](https://junglewise.ai/threats/cve-2026-107466-a-flaw-was-found-in-flatpak-builder-this-vulnerability-allows-an) (medium, CVSS 6.1, published 8 Oct 2026)
- [CVE-2026-86320: flatpak-builder arbitrary code execution via Git hooks in patch sources](https://junglewise.ai/threats/cve-2026-86320-flatpak-builder-arbitrary-code-execution-via-git-hooks-in-patch) (high, CVSS 7.8, published 17 Sep 2026)
- [CVE-2026-39977: flatpak-builder is a tool to build flatpaks from source. From 1.4.5 to before 1.4.8, the license-files manifest key…](https://junglewise.ai/threats/cve-2026-39977-flatpak-builder-is-a-tool-to-build-flatpaks-from-source-from-1-4) (medium, CVSS 6.3, published 9 Apr 2026)

## Most severe Flatpak-Builder vulnerabilities

- [CVE-2026-86320: flatpak-builder arbitrary code execution via Git hooks in patch sources](https://junglewise.ai/threats/cve-2026-86320-flatpak-builder-arbitrary-code-execution-via-git-hooks-in-patch) (high, CVSS 7.8, published 17 Sep 2026)
- [CVE-2026-39977: flatpak-builder is a tool to build flatpaks from source. From 1.4.5 to before 1.4.8, the license-files manifest key…](https://junglewise.ai/threats/cve-2026-39977-flatpak-builder-is-a-tool-to-build-flatpaks-from-source-from-1-4) (medium, CVSS 6.3, published 9 Apr 2026)
- [CVE-2026-107466: flatpak-builder local file disclosure via crafted manifest](https://junglewise.ai/threats/cve-2026-107466-a-flaw-was-found-in-flatpak-builder-this-vulnerability-allows-an) (medium, CVSS 6.1, published 8 Oct 2026)

## Vulnerabilities per week

Nothing in the last four weeks, down from 2 vulnerabilities in the four before.

| Week of | Vulns | Critical | Exploited |
| --- | --- | --- | --- |
| 17 Aug 2026 | 0 | 0 | 0 |
| 24 Aug 2026 | 0 | 0 | 0 |
| 31 Aug 2026 | 0 | 0 | 0 |
| 7 Sep 2026 | 0 | 0 | 0 |
| 14 Sep 2026 | 1 | 0 | 0 |
| 21 Sep 2026 | 0 | 0 | 0 |
| 28 Sep 2026 | 0 | 0 | 0 |
| 5 Oct 2026 | 1 | 0 | 0 |
| 12 Oct 2026 | 0 | 0 | 0 |
| 19 Oct 2026 | 0 | 0 | 0 |
| 26 Oct 2026 | 0 | 0 | 0 |
| 2 Nov 2026 | 0 | 0 | 0 |
| 9 Nov 2026 | 0 | 0 | 0 |

## Other Flatpak technologies

- [Flatpak](https://junglewise.ai/threats/technologies/flatpak): 12 vulnerabilities
- [Flatpak Xdg-Desktop-Portal](https://junglewise.ai/threats/technologies/xdg-desktop-portal): 3 vulnerabilities

## Sources

NVD, GitHub Security Advisories, OSV, the CISA Known Exploited Vulnerabilities catalog, FIRST EPSS and vendor advisories. Rebuilt every hour. Cite as: Junglewise Threat Intelligence, "Flatpak-Builder vulnerabilities", https://junglewise.ai/threats/technologies/flatpak-builder, 9 November 2026.