Host file deletion via unchecked cache path
Published Apr 7, 2026 · Updated Apr 7, 2026
Path traversal in Flatpak before 1.16.4 allows local users running a malicious sandboxed app to delete arbitrary host files. Its ld.so cache cleanup accepts an app-controlled path and removes the referenced outdated cache entry without confirming that the path remains inside the cache directory. A malicious Flatpak app is the required gate, and successful exploitation deletes host files selected through the crafted path.
Summary
What happened
Path traversal in Flatpak before 1.16.4 allows local users running a malicious sandboxed app to delete arbitrary host files. Its ld.so cache cleanup accepts an app-controlled path and removes the referenced outdated cache entry without confirming that the path remains inside the cache directory. A malicious Flatpak app is the required gate, and successful exploitation deletes host files selected through the crafted path.
The record
- CVE
- CVE-2026-34079
- Published
- Apr 7, 2026
- Updated
- Apr 7, 2026
- Vendor
- Libslirp Project
- Product
- Flatpak
- Classifications
- CWE-22, T1485
- Attack vector
- local
- Privileges
- Unavailable
Timeline
How it unfolded
- Apr 7, 2026CVE publishedPublication date reported by the CVE source.
- Apr 7, 2026Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
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Is a vulnerable build present?
Compare these published version ranges with your installed build and any vendor patches.
- Affected versionversion=< 1.16.4
What conditions does exploitation require?
What is affected?
Published CVSS scores
CVSS describes severity. EPSS estimates exploitation probability.
Attacks
What attackers are doing with it
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Weakness, pattern, technique
Public exploit references
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Technologies
Your stack
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Your stack
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