CVE-2025-11375 | Consul's event endpoint is vulnerable to denial of service

Consul and Consul Enterprise’s (“Consul”) event endpoint is vulnerable to denial of service (DoS) due to lack of maximum value on the Content Length header. This vulnerability, CVE-2025-11375, is fixed in Consul Community Edition 1.22.0 and Consul Enterprise 1.22.0, 1.21.6, 1.20.8 and 1.18.12.

Published: 2025-10-28 Last update: 2025-12-22 Assigner: [email protected] Source: [email protected]
NVD Status：Analyzed，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2025-11375 is rated Low Risk (26.5/100): CVSS Medium severity, with low exploitation likelihood (EPSS 0.01%). Monitor for updates and reassess as exploit intelligence or EPSS changes.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Exploit prediction scoring system (EPSS) score for CVE-2025-11375

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2025-10-29 — 0.01% —

Full EPSS history (1 record total)

Common vulnerability scoring system (CVSS) metrics for CVE-2025-11375

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
6.5 3.1 MEDIUM
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H Click to expand
Attack vector (AV:N)
Could be attacked over the internet or any normal routed network—not just someone sitting at the machine.
Attack complexity (AC:L)
Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:L)
A normal user session is enough; they don’t have to be admin.
User interaction (UI:N)
Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:N)
Doesn’t really leak secrets in a meaningful way.
Integrity (I:N)
Data isn’t meaningfully altered or forged.
Availability (A:H)
Could take the service down hard or make it unusable for people who depend on it.
 2.8 3.6 [email protected]

Weakness enumeration for CVE-2025-11375

GitHub Security Advisory for CVE-2025-11375

GHSA-qh7p-pfq3-677h · Severity: medium · Ecosystem: go — Consul event endpoint is vulnerable to denial of service

OS Trackers for CVE-2025-11375

vendor priority summary link
alpine — CVE-2025-11375: 1 source package rows (consul); 5 state rows across 1 repos (edge-community); fixed 0, open 5. https://security.alpinelinux.org/vuln/CVE-2025-11375
debian end-of-life CVE-2025-11375 end-of-life priority: Debian including 1 source packages (consul), 1 status rows across 1 suites (bullseye): open 1. https://security-tracker.debian.org/tracker/CVE-2025-11375
redhat medium — https://access.redhat.com/security/cve/CVE-2025-11375
ubuntu medium CVE-2025-11375 medium priority: Ubuntu including 1 source packages (consul), 7 status rows across 7 suites (bionic, focal, jammy, noble, plucky, questing, upstream): needs-triage 4, DNE 3. https://ubuntu.com/security/CVE-2025-11375

Affected software / configurations for CVE-2025-11375

Vendor Product Version Raw CPE
hashicorp consul < 1.18.12 cpe:2.3:a:hashicorp:consul:*:*:*:*:enterprise:*:*:*
hashicorp consul < 1.22.0 cpe:2.3:a:hashicorp:consul:*:*:*:*:-:*:*:*
hashicorp consul >= 1.19.0, < 1.20.8 cpe:2.3:a:hashicorp:consul:*:*:*:*:enterprise:*:*:*
hashicorp consul >= 1.21.0, < 1.21.6 cpe:2.3:a:hashicorp:consul:*:*:*:*:enterprise:*:*:*

References for CVE-2025-11375

cvelogic Threat Intelligence