Incorrect Authorization in HashiCorp Consul

published 2020-01-31 6 y ago modified 2026-09-08 2 mo ago also BIT-consul-2020-7955 , EUVD-2021-1487 , GHSA-r9w6-rhh9-7v53 , GO-2022-0874

cvss: 5.3; version 3.1, NVD
cisa kev: Not listed; not in CISA's catalog
epss: 1.4%; EPSS 1.4% chance of exploitation in 30 days, percentile 72%
public exploits: 0; none known

HashiCorp Consul and Consul Enterprise 1.4.1 through 1.6.2 did not uniformly enforce ACLs across all API endpoints, resulting in potential unintended information disclosure. Fixed in 1.6.3.

Patch / fix

fixed in 3 distros 1

go github.com/hashicorp/consul 1.6.3
bitnami consul 1.6.2
hashicorp consul 1.6.2

consul Debian 11 1.7.0+dfsg1-1

debian advisories DEBIAN-CVE-2020-7955

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2020-7955 updated 2026-01-13 cvss 5.3

consul: Missing access control in HTTP API endpoints

Red Hat OpenShift Service Mesh 1 servicemesh, servicemesh-mixc, servicemesh-mixs, servicemesh-galley, servicemesh-citadel, servicemesh-istioctl, +5 more Red Hat Fuse 7 consul-client consul-client
not affected: vulnerable code not present

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

Exploit prediction

1.41% chance of exploitation in the next 30 days, higher than 72% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by	version	score	vector
GitHub	3.1	5.3	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
NVD	3.1	5.3	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
NVD	2.0	5.0	AV:N/AC:L/Au:N/C:P/I:N/A:N
OSV	3.1	5.3	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N

Affected packages

ecosystem	package	affected	fixed in
go	github.com/hashicorp/consul	>=1.4.1, <1.6.3	1.6.3
bitnami	consul	>=1.4.1, <1.6.2	1.6.2

Classification

Weakness

CWE-863 Incorrect Authorization

References

hashicorp.com /blog/category/consul/
vendor-advisory, advisory
github.com /hashicorp/consul/issues/7160
web, third-party-advisory, advisory, report
nvd.nist.gov /vuln/detail/CVE-2020-7955
advisory, web
hashicorp.com /blog/category/consul
web
github.com /advisories/GHSA-r9w6-rhh9-7v53
advisory

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

Summary