CVE-2026-105626

Consul vulnerable to a denial of service in HTTP APIs

7.5 High

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.

Attack profile

How easy it is to exploit

Attack vector: Network
Complexity: Low
Privileges needed: None
User interaction: None

What an attacker can affect

Confidentiality: None
Integrity: None
Availability: High

Exploit likelihood

0.43%Unchanged since Oct 27, 2026

What each source reports

CVE List Score used 7.5

Consul vulnerable to a denial of service in HTTP APIs

Record: CVE-2026-105626
CVSS 3.1: 7.5 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Weakness: CWE-770
Updated: 2026-11-02

EUVDEUVD-2026-110056 7.5

Record: EUVD-2026-110056
CVSS 3.1: 7.5 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Updated: 2026-11-02

GitHub AdvisoriesGHSA-924q-7grr-82mf 7.5

HashiCorp Consul and Consul Enterprise are vulnerable to a denial of service in the HTTP API that...

Record: GHSA-924q-7grr-82mf
CVSS 3.1: 7.5 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Weakness: CWE-770
Updated: 2026-11-02

NVD 7.5

Record: CVE-2026-105626
CVSS 3.1: 7.5 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Weakness: CWE-770
Updated: 2026-11-02

OSV 7.5

Consul vulnerable to a denial of service in HTTP APIs

Record: CVE-2026-105626
CVSS 3.1: 7.5 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Weakness: CWE-770
Updated: 2026-11-02

OSVUBUNTU-CVE-2026-105626 7.5

Record: UBUNTU-CVE-2026-105626
CVSS 3.1: 7.5 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Updated: 2026-11-02

Affected products

Affected packages

Affected packages
Package	Affected	Fixed
`consul` Ubuntu:18.04:LTS	All versions, plus listed versions 0.6.4~dfsg-3	None known
`consul` Ubuntu:20.04:LTS	All versions, plus listed versions 1.0.7~dfsg1-5ubuntu11.4.4~dfsg1-2ubuntu21.5.2+dfsg1-61.5.2+dfsg1-101.5.2+dfsg1-121.5.2+dfsg2-14	None known
`consul` Ubuntu:22.04:LTS	All versions, plus listed versions 1.7.4+dfsg1-11.8.7+dfsg1-3	None known

History

History
Recorded	Changed	Sources
Nov 2, 2026	first indexed	CVE List, EUVD, GitHub Advisories, NVD, OSV

Dates are when Every CVE recorded each change. Upstream dates may differ.

In short

CVE-2026-105626 is a high vulnerability (CVSS 7.5) in Hashicorp Consul, published October 26, 2026. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.43%, the 37th percentile. No source names a fixed version.