6.5

CVE-2026-87106: hashicorp consul Uncontrolled Resource Consumption

CVSS: 6.5v3.1MediumAwaiting analysis
AliasesUBUNTU-CVE-2026-87106CGA-63p7-cjj9-mfphCGA-7r2x-5xc5-59xc
Published 10-09-2026Last modified 10-09-2026
Open JSON

Vulnerability summary

CVE-2026-87106 is a medium (CVSS 6.5) Uncontrolled Resource Consumption vulnerability in hashicorp consul. EPSS estimates a 0.41% chance of exploitation in the next 30 days, higher than 33.9% of scored vulnerabilities.

Overall risk
26/100
0100
Medium · default modelHow is this calculated?
CVSS score
6.5/10
010
Medium · v3.1 (CVE.org)
EPSS score
0.41%
0%100%
Low · +0.18 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Timeline

  1. 10-09-2026
    PublishedVulnerability first disclosed.
  2. 10-09-2026
    Last modifiedVulnerability information updated.

Description

Consul and Consul Enterprise are vulnerable to a denial of service in the native RPC listener that may allow an authenticated client to exhaust server memory before ACL authorization is evaluated. A client that can complete the internal RPC mTLS handshake may exploit this issue without holding a valid ACL token. This vulnerability (CVE-2026-87106) is fixed in Consul 2.0.4 and Consul Enterprise 1.21.18, 1.22.12 and 2.0.4.

CVSS metrics

4 scores · 4 sources · 1 version

EPSS trend

Probability

0.41%

Chance of exploitation in the next 30 days

Percentile

34%

Versus all other CVEs

30-day change

+0.18 pp

From 0.24% on 20-09-2026

20-09-202620-10-2026
EPSS score
0.41%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Chainguard2 products
  • consul-1.22All versions (No fix recorded)
  • consul-fips-1.22All versions (No fix recorded)
Hashicorp2 products
Ubuntu1 product
  • consulAll versions (No fix recorded)

3 vendors · 5 products

References

6 links