CVE-2026-96808

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Source
https://cve.org/CVERecord?id=CVE-2026-96808
Import Source
https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-96808.json
JSON Data
https://api.osv.dev/v1/vulns/CVE-2026-96808
Aliases
  • GHSA-qrwq-7qwx-q9rp
Downstream
Published
2026-09-23T16:58:37Z
Modified
2026-09-24T03:46:18Z
Severity
  • 7.4 (High) CVSS_V3 - CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H CVSS Calculator
Summary
[none]
Details

In Flatpak before 1.18.1, the revokefs writer, used by the flatpak-system-helper to receive repository data from unprivileged callers, validated file paths by rejecting literal .. components but did not prevent symlink traversal. A malicious local user in an active local session could obtain two revokefs sessions via the system helper, create a symlink in one session pointing into the other session's directory, and retain a file descriptor through that symlink. This allowed the attacker to modify files belonging to a different revokefs session after they had been validated and imported by the system helper. In particular, an attacker could use this to tamper with ostree commit objects in the system repository after they passed signature verification, enabling root-controlled file writes to attacker-chosen paths and local root privilege escalation.

Database specific 
{
    "cna_assigner":  "mitre",
    "cwe_ids":  [
        "CWE-61"
    ],
    "osv_generated_from":  "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/96xxx/CVE-2026-96808.json"
}
References

Affected packages

Git / github.com/flatpak/flatpak

Affected ranges

Type
GIT
Repo
https://github.com/flatpak/flatpak
Events
Introduced
0 Unknown introduced commit / All previous commits are affected
Fixed
abc06c8bf434171e931426e76a9eb0bfe17cfabd
Database specific
Show details 
{
    "extracted_events":  [
        {
            "introduced":  "0"
        },
        {
            "fixed":  "1.18.1"
        }
    ],
    "source":  "AFFECTED_FIELD"
}

Affected versions

0.*
0.1
0.10.0
0.10.1
0.10.2
0.11.1
0.11.2
0.11.3
0.11.4
0.11.5
0.11.6
0.11.7
0.11.8
0.11.8.1
0.11.8.2
0.11.8.3
0.2
0.2.1
0.3
0.3.1
0.3.2
0.3.3
0.3.4
0.3.5
0.3.6
0.4.0
0.4.1
0.4.10
0.4.11
0.4.12
0.4.13
0.4.2
0.4.2.1
0.4.3
0.4.4
0.4.5
0.4.6
0.4.7
0.4.8
0.4.9
0.5.0
0.5.1
0.5.2
0.6.0
0.6.1
0.6.10
0.6.11
0.6.12
0.6.13
0.6.14
0.6.2
0.6.3
0.6.4
0.6.5
0.6.6
0.6.7
0.6.8
0.6.9
0.8.0
0.8.1
0.9.1
0.9.10
0.9.11
0.9.12
0.9.2
0.9.3
0.9.4
0.9.5
0.9.6
0.9.7
0.9.8
0.9.9
0.9.98
0.9.98.1
0.9.98.2
0.9.99
0.99.1
0.99.2
0.99.3
1.*
1.0.0
1.0.1
1.0.2
1.0.3
1.1.0
1.1.1
1.1.2
1.1.3
1.10.0
1.10.1
1.11.1
1.11.2
1.11.3
1.12.0
1.13.1
1.13.2
1.13.3
1.14.0
1.15.0
1.15.1
1.15.10
1.15.11
1.15.12
1.15.2
1.15.3
1.15.4
1.15.6
1.15.7
1.15.8
1.15.9
1.15.91
1.16.0
1.16.1
1.17.0
1.17.1
1.17.2
1.17.3
1.17.4
1.17.5
1.17.6
1.17.7
1.18.0
1.2.0
1.2.1
1.3.0
1.3.1
1.3.2
1.3.3
1.3.4
1.4.0
1.5.0
1.5.1
1.5.2
1.6.0
1.6.1
1.6.2
1.7.1
1.7.2
1.7.3
1.8.0
1.9.1
1.9.2
1.9.3

Database specific

source 
"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-96808.json"