CVE-2026-96808

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.

• CWE-61

• https://github.com/flatpak/flatpak/security/advisories/GHSA-qrwq-7qwx-q9rp

Published

Sep 23, 2026

Last Modified

Sep 23, 2026

Status

Received

• How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
• Autonomous PentestingAI agents that find and validate exploitable vulnerabilities like this one across your applications.
• PR ReviewsPentest every pull request so vulnerable code is caught before it ships to production.
• AI Penetration TestingHow AI-driven penetration testing continuously covers your attack surface.

• CVE-2026-96775MLflow's dspy flavor, versions >= 2.0, applies the MLFLOW_A…8.8
• CVE-2026-9678Impact: Undici's cache interceptor incorrectly classifies so…5.9
• CVE-2026-9679Impact: undici's cookie parser in parseSetCookie percent-dec…5.9
• CVE-2026-9680Improper exposure of the MCP server in alibabacloud-rds-open…5.8
• CVE-2026-96804MLflow's statsmodel flavor, versions 2.1.0 to 3.14.0, omits …8.8
• CVE-2026-96807In Flatpak before 1.18.1, a malicious sandboxed app can repl…4
• CVE-2026-96872Improper handling of insufficient permissions or privileges …2.9
• CVE-2026-9689A flaw was found in Keycloak, an open-source identity and ac…4.2
• CVE-2026-9690Unauthenticated Arbitrary File Download in WP Media folder A…7.5
• CVE-2026-9691Unauthenticated PHP Object Injection in Integration for Acti…9.8
• CVE-2026-9692Mojolicious::Sessions::Storable versions through 0.05 for Pe…5.3
• CVE-2026-9693Mattermost versions 10.11.x <= 10.11.20, 11.7.x <= 11.7.5 Ma…3.5