cve-2026-96275
HIGH CVSS 8.8 csaf_redhat
Description
This content is licensed under the Creative Commons Attribution 4.0 International License (https://creativecommons.org/licenses/by/4.0/). If you distribute this content, or a modified version of it, you must provide attribution to Red Hat Inc. and provide a link to the original.
Timeline
- Published
- 2026-08-11 00:00 UTC
- Last Modified
- 2026-09-23
CVSS Details
CVSS details not available.
Affected Products
No product information available.
Weaknesses (CWE)
References
No references available.
Linked Vulnerabilities
No linked vulnerabilities found.
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"cve": "CVE-2026-96275",
"cwe": {
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"name": "Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')"
},
"discovery_date": "2026-08-11T00:00:00+00:00",
"ids": [
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"text": "2539416"
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"notes": [
{
"category": "description",
"text": "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.",
"title": "Vulnerability description"
},
{
"category": "summary",
"text": "flatpak: flatpak: Arbitrary write access as root via extra-data extraction",
"title": "Vulnerability summary"
},
{
"category": "other",
"text": "Red Hat has provided an estimated CVSS vector:\n- AV:N — payload is served from a malicious/compromised Flatpak repository over the network.\n- AC:L — both underlying bugs (symlink-following on the files checkout path, ../ traversal in the extra-data blob name) trigger reliably once the repo is malicious; no race condition or extra preconditions.\n- PR:N — the attacker needs no privileges on the victim host, only control of the repo content.\n- UI:R — a user/admin must add or trust the malicious remote and initiate an install/update from it.\n- S:U — kept unchanged since the vulnerable and impacted components (flatpak client/system-helper stack) already share the same security authority for system-wide installs by design.\n- C:H/I:H/A:H — this is an arbitrary-file-write primitive; on system-wide installs it runs as root via the privileged system-helper, and an unconstrained root-owned write is treated as equivalent to full compromise.",
"title": "Statement"
},
{
"category": "general",
"text": "The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.",
"title": "CVSS score applicability"
}
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{
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"url": "https://www.cve.org/CVERecord?id=CVE-2026-96275"
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{
"category": "external",
"summary": "https://nvd.nist.gov/vuln/detail/CVE-2026-96275",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-96275"
},
{
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"summary": "https://github.com/flatpak/flatpak/security/advisories/GHSA-fqx6-vh4p-42cg",
"url": "https://github.com/flatpak/flatpak/security/advisories/GHSA-fqx6-vh4p-42cg"
}
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"details": "Fixed in v1.18.1. Avoid installing Flatpak extensions from non-trusted sources.",
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"scores": [
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"attackComplexity": "LOW",
"attackVector": "NETWORK",
"availabilityImpact": "HIGH",
"baseScore": 8.8,
"baseSeverity": "HIGH",
"confidentialityImpact": "HIGH",
"integrityImpact": "HIGH",
"privilegesRequired": "NONE",
"scope": "UNCHANGED",
"userInteraction": "REQUIRED",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H",
"version": "3.1"
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"category": "impact",
"details": "Important",
"product_ids": [
"red_hat_enterprise_linux_10:flatpak",
"red_hat_enterprise_linux_10:flatpak-devel",
"red_hat_enterprise_linux_10:flatpak-libs",
"red_hat_enterprise_linux_10:flatpak-selinux",
"red_hat_enterprise_linux_10:flatpak-session-helper",
"red_hat_enterprise_linux_10:flatpak.src",
"red_hat_enterprise_linux_7:flatpak",
"red_hat_enterprise_linux_7:flatpak-builder",
"red_hat_enterprise_linux_7:flatpak-devel",
"red_hat_enterprise_linux_7:flatpak-libs",
"red_hat_enterprise_linux_7:flatpak.src",
"red_hat_enterprise_linux_8:flatpak",
"red_hat_enterprise_linux_8:flatpak-devel",
"red_hat_enterprise_linux_8:flatpak-libs",
"red_hat_enterprise_linux_8:flatpak-selinux",
"red_hat_enterprise_linux_8:flatpak-session-helper",
"red_hat_enterprise_linux_8:flatpak.src",
"red_hat_enterprise_linux_9:flatpak",
"red_hat_enterprise_linux_9:flatpak-devel",
"red_hat_enterprise_linux_9:flatpak-libs",
"red_hat_enterprise_linux_9:flatpak-selinux",
"red_hat_enterprise_linux_9:flatpak-session-helper",
"red_hat_enterprise_linux_9:flatpak.src"
]
}
],
"title": "flatpak: flatpak: Arbitrary write access as root via extra-data extraction"
}
]
}