PatchTheCVEflatpak-builder vulnerabilities and fixes
Recent CVEs affecting flatpak-builder, with upgrade or downgrade steps. 1 tracked.
Also searched as: flatpak builder.
flatpak-builder has 1 tracked vulnerability, 0 critical. A fixed release or vendor patch exists for 1. Most recent: 2026-04-09. Highest priority: CVE-2026-39977 (score 32/100).
- CVE-2026-39977 MEDIUM 6.3 UPGRADE flatpak-builder is a tool to build flatpaks from source
FAQ
How do I fix flatpak-builder vulnerabilities?
Open the CVE for your version, check the affected range, then follow the listed action: upgrade to the fixed release, or downgrade or mitigate if no fix exists yet. Commands for each OS are shown on every CVE page.
Is flatpak-builder being exploited right now?
None of the tracked flatpak-builder CVEs are on the CISA Known Exploited Vulnerabilities list at the moment. This is checked every 20 minutes.
Which flatpak-builder CVE should I patch first?
CVE-2026-39977 currently ranks highest (32/100): flatpak-builder is a tool to build flatpaks from source.