JWT Auth in L7 Intentions Allow For Mismatched Service Identity and JWT Providers for Access

published 2023-08-09 3 y ago modified 2026-09-08 2 mo ago also BIT-consul-2023-3518 , EUVD-2023-2260 , GHSA-9rhf-q362-77mx , GO-2024-2704

cvss: 7.4; version 3.1, CNA
cisa kev: Not listed; not in CISA's catalog
epss: 0.4%; EPSS 0.4% chance of exploitation in 30 days, percentile 39%
public exploits: 0; none known

HashiCorp Consul and Consul Enterprise 1.16.0 when using JWT Auth for service mesh incorrectly allows/denies access regardless of service identities. Fixed in 1.16.1.

Patch / fix

fixed in 2

go github.com/hashicorp/consul 1.16.1
bitnami consul 1.16.1

CISA SSVC

Exploitation: none
Automatable: no
Technical impact: partial
Assessed: 2 y ago (2024-10-08)

Exploit prediction

0.45% chance of exploitation in the next 30 days, higher than 39% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by	version	score	vector
CNA	3.1	7.4	CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:L
GitHub	3.1	7.4	CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:L
NVD	3.1	7.3	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L
OSV	3.1	7.3	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L

Affected packages

ecosystem	package	affected	fixed in
go	github.com/hashicorp/consul	>=1.16.0, <1.16.1	1.16.1
bitnami	consul	>=1.16.0, <1.16.1	1.16.1

Affected products

HashiCorp Consul
HashiCorp Consul Enterprise

Classification

Weakness

CWE-266 Incorrect Privilege Assignment
CWE-285 Improper Authorization

References

discuss.hashicorp.com /t/hcsec-2023-25-consul-jwt-auth-in-l7-intentions-allow-for-mismatched-service-identity-and-jwt-providers/5700
web, vendor-advisory, advisory
nvd.nist.gov /vuln/detail/CVE-2023-3518
advisory, web
github.com /hashicorp/consul
package
github.com /advisories/GHSA-9rhf-q362-77mx
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