What is CVE-2026-105626?

CVE-2026-105626 is a high-severity vulnerability in Hashicorp Consul, classified under Allocation of Resources Without Limits or Throttling. CVSS score: 7.5/10. Published 2026-10-26.

How severe is CVE-2026-105626?

High severity. CVSS v3 base score is 7.5 out of 10.

Resource exhaustion in Hashicorp Consul

CVE-2026-105626

HashiCorp Consul and Consul Enterprise are vulnerable to a denial of service in the HTTP API that may allow an unauthenticated attacker to exhaust memory on a Consul agent. This vulnerability (CVE-2026-105626) is fixed in Consul Community Edition 2.1.0 and Consul Enterprise 2.1.0 and 1.21.19.

Published 2026-10-26 · last modified 2026-10-26.

CVSS v3 metric

CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.

EPSS exploit prediction

No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.

Affected products

Weakness classification (CWE)

CWE-770 — Allocation of Resources Without Limits or Throttling

References

discuss.hashicorp.com/t/hcsec-2026-48-consul-vulnerable-to-a-denial-of-service-…

Frequently asked questions

What is CVE-2026-105626?: CVE-2026-105626 is a high-severity vulnerability in Hashicorp Consul, classified under Allocation of Resources Without Limits or Throttling. CVSS score: 7.5/10. Published 2026-10-26.
How severe is CVE-2026-105626?: High severity. CVSS v3 base score is 7.5 out of 10.