CVE•Published 2026-04-07•Modified 2026-06-30•1 article on news•6 live references•NVD data
CVE-2026-34078Flatpak · Flatpak
Vulnerability data via NVD (ingested)
CVSS v3.1
10.0
CRITICAL
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
EPSS percentile
13
Exploit Prediction Scoring System · top 87% of all CVEs
Weaknesses (CWE)
Description
Flatpak is a Linux application sandboxing and distribution framework. Prior to 1.16.4, the Flatpak portal accepts paths in the sandbox-expose options which can be app-controlled symlinks pointing at arbitrary paths. Flatpak run mounts the resolved host path in the sandbox. This gives apps access to all host files and can be used as a primitive to gain code execution in the host context. This vulnerability is fixed in 1.16.4.
Timeline
Published 2026-04-07
Modified 2026-06-30
External references
Search for exposed instances
Shodan + Censys queries derived from NVD's CPE data. The vuln tag catches assets Shodan has explicitly linked to this CVE; the product / banner fingerprints find exposed instances even when the vuln tag was never applied (which is common).
Shodan · vuln tag0 hosts
vuln:CVE-2026-34078Hosts Shodan has explicitly fingerprinted as vulnerable.
Shodan · product
product:"Flatpak Flatpak"All exposed Flatpak Flatpak instances — cross-reference with the CVE's affected-version range.
Shodan · banner/body mention
http.html:"Flatpak"HTTP body or banner mentions "Flatpak" — catches deploys Shodan didn't identify as a product.
More intel sources (5)
Shodan report
vuln:CVE-2026-34078Country / ASN / product breakdown for the vuln query.
Censys
vulnerabilities.cve_id: CVE-2026-34078Censys host search filtered to this CVE id.
grep.app
CVE-2026-34078Public source-code mentions — fast PoC discovery.
GitHub code
CVE-2026-34078GitHub code search for direct mentions.
Google dork
"CVE-2026-34078" exploit -site:nvd.nist.govWrite-ups and news, NVD excluded.
Known PoCs on GitHub
No public proof-of-concept repositories found for CVE-2026-34078 on GitHub.