8.8

CVE-2026-94422: fedora Authentication Bypass by Spoofing

CVSS: 8.8v3.1HighAwaiting analysis
AliasesMGASA-2026-0480UBUNTU-CVE-2026-94422DEBIAN-CVE-2026-94422
Published 02-10-2026Last modified 02-10-2026
Open JSON

Vulnerability summary

CVE-2026-94422 is a high (CVSS 8.8) Authentication Bypass by Spoofing vulnerability in fedora. EPSS estimates a 0.69% chance of exploitation in the next 30 days, higher than 52% of scored vulnerabilities.

Overall risk
35/100
0100
Medium · default modelHow is this calculated?
CVSS score
8.8/10
010
High · v3.1 (CVE.org)
EPSS score
0.69%
0%100%
Low · Change unavailable
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Advisory lineage

Upstream 0 · Downstream 1 · Related 1
OPENSUSE-SU-2026:11913-1

Timeline

  1. 02-10-2026
    PublishedVulnerability first disclosed.
  2. 02-10-2026
    Last modifiedVulnerability information updated.

Description

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.

CVSS metrics

7 scores · 4 sources · 2 versions

EPSS trend

Probability

0.69%

Chance of exploitation in the next 30 days

Percentile

52%

Versus all other CVEs

30-day change

Change unavailable

Change unavailable

03-10-202619-10-2026
EPSS score
0.69%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Debian1 product
  • xdg-dbus-proxyAll versions (No fix recorded) | < 0.1.6-1+deb13u3 | < 0.1.9-1
Fedora1 product
Mageia1 product
  • xdg-dbus-proxy< 0.1.9-1.mga10
Ubuntu1 product
  • xdg-dbus-proxyAll versions (No fix recorded)

4 vendors · 4 products

References

15 links
Show all 15 references