Bug 2539424 (CVE-2026-96283) - CVE-2026-96283 flatpak: flatpak: flatpak-system-helper cross-user CancelPull orphans another user's ongoing pull
Summary: CVE-2026-96283 flatpak: flatpak: flatpak-system-helper cross-user CancelPull ...
Keywords:
Status: NEW
Alias: CVE-2026-96283
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
low
low
Target Milestone: ---
Assignee: Product Security
QA Contact:
URL:
Whiteboard:
Depends On:
Blocks:
TreeView+ depends on / blocked
 
Reported: 2026-09-23 14:04 UTC by OSIDB Bzimport
Modified: 2026-09-27 21:50 UTC (History)
2 users (show)

Fixed In Version:
Clone Of:
Environment:
Last Closed:
Embargoed:

Attachments (Terms of Use)

Description OSIDB Bzimport 2026-09-23 14:04:47 UTC 
GHSA-89xm-3m96-w3jg (https://github.com/flatpak/flatpak/security/advisories/GHSA-89xm-3m96-w3jg)

Description: By calling org.freedesktop.Flatpak.SystemHelper.CancelPull on another user's pull, the pull does not get cancelled but removed from internal tracking, making it impossible to stop it.

Mitigation: No known mitigation other than updating. Patched in 1.16.4 and 1.18.0. Credit: Asim Viladi Oglu Manizada.
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