How severe is CVE-2026-34080?

CVE-2026-34080 has a CVSS 3.x base score of 5.5, rated medium severity. It is exploitable over local access with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability none.

Is CVE-2026-34080 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (7th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-34080?

CVE-2026-34080 affects Flatpak Xdg-dbus-proxy. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-34080?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

Does CVE-2026-34080 have an EU (EUVD) identifier?

Yes. CVE-2026-34080 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-19945.

When was CVE-2026-34080 published?

CVE-2026-34080 was published on 2026-04-07 and last updated on 2026-06-17.

CVE-2026-34080

CVE-2026-34080 is a medium-severity vulnerability in Flatpak Xdg-dbus-proxy with a CVSS 3.x base score of 5.5. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-1289.

Key facts

Severity: Medium (CVSS 3.x base score 5.5)
CVSS v4: 6.8
EPSS exploit prediction: 0% (7th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-19945
Weakness: CWE-1289
Affected product: Flatpak Xdg-dbus-proxy
Published: 2026-04-07
Last modified: 2026-06-17

Description

xdg-dbus-proxy is a filtering proxy for D-Bus connections. Prior to 0.1.7, a policy parser vulnerability allows bypassing eavesdrop restrictions. The proxy checks for eavesdrop=true in policy rules but fails to handle eavesdrop ='true' (with a space before the equals sign) and similar cases. Clients can intercept D-Bus messages they should not have access to. This vulnerability is fixed in 0.1.7.

Frequently asked questions

What is CVE-2026-34080?: xdg-dbus-proxy is a filtering proxy for D-Bus connections. Prior to 0.1.7, a policy parser vulnerability allows bypassing eavesdrop restrictions. The proxy checks for eavesdrop=true in policy rules but fails to handle eavesdrop ='true' (with a space before the equals sign) and similar cases. Clients can intercept D-Bus messages they should not have access to. This vulnerability is fixed in 0.1.7.
How severe is CVE-2026-34080?: CVE-2026-34080 has a CVSS 3.x base score of 5.5, rated medium severity. It is exploitable over local access with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability none.
Is CVE-2026-34080 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (7th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-34080?: CVE-2026-34080 affects Flatpak Xdg-dbus-proxy. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-34080?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2026-34080 have an EU (EUVD) identifier?: Yes. CVE-2026-34080 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-19945.
When was CVE-2026-34080 published?: CVE-2026-34080 was published on 2026-04-07 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:flatpak:xdg-dbus-proxy:*:*:*:*:*:*:*:*

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