What is CVE-2026-34933?

CVE-2026-34933 is a medium-severity vulnerability in Avahi, classified under Reachable Assertion. CVSS score: 5.5/10. Published 2026-04-03.

How severe is CVE-2026-34933?

Medium severity. CVSS v3 base score is 5.5 out of 10.

Vulnerability in Avahi

CVE-2026-34933

Avahi is a system which facilitates service discovery on a local network via the mDNS/DNS-SD protocol suite. Prior to version 0.9-rc4, any unprivileged local user can crash avahi-daemon by sending a single D-Bus method call with conflictin…

EPSS: 0.000 (0.8th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 5.5 (Medium). Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H.

Affected products

Avahi — versions < 0.9-rc4

Weakness classification (CWE)

CWE-617 — Reachable Assertion

References

https://github.com/avahi/avahi/security/advisories/GHSA-w65r-6gxh-vhvc (x_refsource_CONFIRM)
https://github.com/avahi/avahi/pull/891 (x_refsource_MISC)
https://github.com/avahi/avahi/commit/625ca0fac19229f6dfa3a6c6b698ae657187e50c (x_refsource_MISC)

Frequently asked questions

What is CVE-2026-34933?: CVE-2026-34933 is a medium-severity vulnerability in Avahi, classified under Reachable Assertion. CVSS score: 5.5/10. Published 2026-04-03.
How severe is CVE-2026-34933?: Medium severity. CVSS v3 base score is 5.5 out of 10.