5.4

CVE-2026-87107: hashicorp consul Incorrect Authorization

CVSS: 5.4v3.1MediumAwaiting analysis
AliasesUBUNTU-CVE-2026-87107CGA-34gv-r3x5-4mmwCGA-3mh6-336r-56xw
Published 10-09-2026Last modified 10-09-2026
Open JSON

Vulnerability summary

CVE-2026-87107 is a medium (CVSS 5.4) Incorrect Authorization vulnerability in hashicorp consul. EPSS estimates a 0.31% chance of exploitation in the next 30 days, higher than 22.8% of scored vulnerabilities.

Overall risk
22/100
0100
Low · default modelHow is this calculated?
CVSS score
5.4/10
010
Medium · v3.1 (CVE.org)
EPSS score
0.31%
0%100%
Low · +0.09 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 an authorization bypass in the catalog deregistration path that may allow a local ACL token to delete peer-imported catalog objects. A caller with {{service:write}} or {{node:write}} permission may exploit this issue to remove services, checks, or nodes imported from a peered cluster without holding authority over the peer origin. This vulnerability (CVE-2026-87107) 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

0.31%

Chance of exploitation in the next 30 days

Percentile

23%

Versus all other CVEs

30-day change

+0.09 pp

From 0.23% on 20-09-2026

20-09-202620-10-2026
EPSS score
0.31%

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