High severity · published Sep 23, 2026
CVE-2026-96275
Flatpak: flatpak: arbitrary write access as root via extra-data extraction
8.8
CVSS
0.5%
EPSS
No
On KEV
Description
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.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
Required
Confidentiality
High
Integrity
High
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.5% · higher than 42% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
RH
Red Hat Enterprise Linux 10 · Red Hat
All versions, or not specified · source: vendor
RH
Red Hat Enterprise Linux 7 · Red Hat
All versions, or not specified · source: vendor
RH
Red Hat Enterprise Linux 8 · Red Hat
All versions, or not specified · source: vendor
RH
Red Hat Enterprise Linux 9 · Red Hat
All versions, or not specified · source: vendor
RH
Red Hat Enterprise Linux 9.4 Update Services for SAP Solutions · Red Hat
All versions, or not specified · source: vendor
RH
Red Hat Enterprise Linux 9.6 Extended Update Support · Red Hat
All versions, or not specified · source: vendor
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-96275
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-96275
vendor-advisory
https://access.redhat.com/errata/RHSA-2026:80497
vendor-advisory
https://access.redhat.com/errata/RHSA-2026:80498
vendor-advisory
https://access.redhat.com/errata/RHSA-2026:80687
vendor-advisory
https://access.redhat.com/errata/RHSA-2026:89733
vendor-advisory
https://access.redhat.com/errata/RHSA-2026:90364
vdb-entry
https://access.redhat.com/security/cve/CVE-2026-96275
More from Red Hat Enterprise Linux 10
7.8
CVE-2026-31431
crypto: algif_aead - Revert to operating out-of-place
7.5
CVE-2026-34486
Apache Tomcat: Fix for CVE-2026-29146 allowed bypass of EncryptInterceptor
10.0
CVE-2026-46595
Invoking VerifiedPublicKeyCallback permissions skip enforcement in golang.org/x/crypto/ssh
10.0
CVE-2026-34078
Flatpak has a complete sandbox escape leading to host file access and code execution in the host context
10.0
CVE-2026-4692
Sandbox escape in the Responsive Design Mode component