8.8

CVE-2026-105608: Consul vulnerable to an authorization bypass in service mesh registration

Awaiting analysis
AliasesUBUNTU-CVE-2026-105608CGA-9gh8-5m2g-w4rpCGA-gg93-8jv7-7fgh
Published 26-10-2026Last modified 26-10-2026

Vulnerability summary

CVE-2026-105608 is a high (CVSS 8.8) Improper Handling of Case Sensitivity vulnerability in hashicorp consul. EPSS estimates a 0.45% chance of exploitation in the next 30 days, higher than 39.2% of scored vulnerabilities.

Priority
Routine

Not severe (CVSS 8.8, network access); no exploitation reported by the 5 checked sources

Source freshness unavailable

How is this decided?
CVSS score
8.8/10
010
High · v3.1 (CVE.org)
EPSS score
0.45%
0%100%
Low · Change unavailable
KEVNot listedNot listed by any tracked catalog.
RansomwareNot flaggedNo ransomware use recorded.
Public exploits0No public exploits recorded

Timeline

  1. 26-10-2026
    PublishedVulnerability first disclosed.
  2. 26-10-2026
    Last modifiedVulnerability information updated.

Description

HashiCorp Consul and Consul Enterprise are vulnerable to an authorization bypass in service mesh proxy registration. This may allow a user with service write permission to apply Envoy escape-hatch configuration without the required mesh write permission. This vulnerability (CVE-2026-105608) is fixed in Consul Community Edition 2.1.0 and Consul Enterprise 2.1.0 and 1.21.19.

CVSS metrics

4 scores · 4 sources · 1 version

EPSS trend

Probability

0.45%

Chance of exploitation in the next 30 days

Percentile

39%

Versus all other CVEs

30-day change

Change unavailable

Change unavailable

27-10-202603-11-2026

Known exploited

Compare KEV catalogs
CISA KEV

Not in the CISA KEV catalog.

ENISA CNW

Not in the ENISA CNW catalog.

CIRCL

Not in the CIRCL catalog.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Version check

Known conditions: network-reachable, low-privilege account, no user interaction (CVSS vector). Other conditions: not stated in public data.

Chainguard2 products
  • consul-2.0All versions (No fix recorded)
  • consul-fips-2.0All versions (No fix recorded)
Hashicorp2 products
Ubuntu1 product
  • consulAll versions (No fix recorded)

3 vendors · 5 products

References

8 links