Vulnerability in Corosync

CVE-2026-35091

A flaw was found in Corosync. A remote unauthenticated attacker can exploit a wrong return value vulnerability in the Corosync membership commit token sanity check by sending a specially crafted User Datagram Protocol (UDP) packet. This ca…

EPSS: 0.003 (52.0th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 8.2 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:H.

Affected products

Weakness classification (CWE)

References

Frequently asked questions

What is CVE-2026-35091?
CVE-2026-35091 is a high-severity vulnerability in Corosync, classified under CWE-253. CVSS score: 8.2/10. Published 2026-04-01.
How severe is CVE-2026-35091?
High severity. CVSS v3 base score is 8.2 out of 10.