Bug 2539543 (CVE-2026-96807)

Summary: CVE-2026-96807 flatpak: Flatpak: Low integrity or availability impact via symlink manipulation
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security DevOps Team <prodsec-dev>
Status: NEW --- QA Contact:
Severity: medium Docs Contact:
Priority: medium    
Version: unspecifiedCC: rhel-process-autobot, watson-tool-maintainers
Target Milestone: ---Keywords: Security
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Hardware: All   
OS: Linux   
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Doc Text:
A flaw was found in Flatpak. A malicious sandboxed application can manipulate a symlink, causing the `regenerate_ld_cache` function to write files to an unintended location. While the attacker cannot control the content or filenames, this vulnerability could lead to a low impact on system integrity or availability.
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oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: --- Target Upstream Version:
Embargoed:
Bug Depends On: 2539621    
Bug Blocks:    

Description OSIDB Bzimport 2026-09-23 17:03:09 UTC
In Flatpak before 1.18.1, a malicious sandboxed app can replace ~/.var/app/$appid/.ld.so with a symlink, causing regenerate_ld_cache to write files at an arbitrary location. The filenames and content are not attacker controlled, making this hard to exploit.