Flatpak: flatpak: arbitrary write access as root via extra-data extraction
Historical advisory recorded 5 Nov 2026 00:54:08 UTC. Read the latest advisory.
cve-program · CVE-2026-96275
PublishedA malicious or compromised Flatpak repository can write attacker-controlled content to arbitrary locations on the host filesystem via extract_extra_data(). On system installs, the write happens as root. Two issues combine: `files/extra` is resolved via path operations that follow symlinks, and blob names from `xa.extra-data-sources` are not sanitized against `..` traversal.
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cve-program · CVE-2026-96275
PublishedFlatpak: flatpak: arbitrary write access as root via extra-data extraction
A malicious or compromised Flatpak repository can write attacker-controlled content to arbitrary locations on the host filesystem via extract_extra_data(). On system installs, the write happens as root. Two issues combine: `files/extra` is resolved via path operations that follow symlinks, and blob names from `xa.extra-data-sources` are not sanitized against `..` traversal.
- Source published
- 23 Sep 2026 15:01:38 UTC
- Source modified
- 5 Nov 2026 00:14:22 UTC
- Saved here
- 5 Nov 2026 00:54:08 UTC
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- CVE Program Terms of Use
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Source: cve-program · CVE Program Terms of Use. The publisher's wording is preserved. ChangeIntel groups the information and labels changes. The JSON record includes additional source fields.
CVSS 3.1 · 8.8 CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H