Answer in brief
CVE-2026-94422 records a High severity (CVSS 8.7) vulnerability in xdg-dbus-proxy: message filtering bypass via reply serial allows sandbox escape. The current sources do not mark it as known exploited. The current feed maps xdg-dbus-proxy (generic), Fedora/xdg-dbus-proxy (generic), Red Hat/xdg-dbus-proxy (generic). Check affected ranges and fixed versions before updating.
Analysis pending evidence review
HOL Guard separates source facts from reviewed analysis. See the methodology.
CVSS is 8.7. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.
Analysis status
Analysis pending evidence review
Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.
The current feed maps xdg-dbus-proxy (generic), Fedora/xdg-dbus-proxy (generic), Red Hat/xdg-dbus-proxy (generic). Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| xdg-dbus-proxygeneric | >=0 <0.1.9 | 0.1.9 |
| Fedora/xdg-dbus-proxygeneric | >=0 <0.1.9 | 0.1.9 |
| Red Hat/xdg-dbus-proxygeneric | * | Not reported |
Published upstream
Oct 2, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Oct 2, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Oct 2, 2026
An incorrect implementation of message filtering in xdg-dbus-proxy versions before 0.1.9 allows an attacker to bypass the intended message filtering on the D-Bus session bus by setting a reply serial number on non-reply messages. A malicious or compromised Flatpak app could use this to achieve arbitrary code execution outside its sandbox. xdg-dbus-proxy was designed to be part of the sandbox boundary for Flatpak, but it is released as a separate project and is sometimes used by other app frameworks such as Firejail.
Quoted source text, attributed separately from HOL analysis.