How severe is CVE-2023-3518?

CVE-2023-3518 has a CVSS 3.x base score of 7.4, rated high severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is low, integrity low, and availability low.

Is CVE-2023-3518 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (30th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2023-3518?

CVE-2023-3518 primarily affects Hashicorp Consul. In total, 3 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2023-3518?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

When was CVE-2023-3518 published?

CVE-2023-3518 was published on 2023-08-09 and last updated on 2026-06-17.

CVE-2023-3518

CVE-2023-3518 is a high-severity vulnerability in Hashicorp Consul with a CVSS 3.x base score of 7.4. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-266.

Key facts

Severity: High (CVSS 3.x base score 7.4)
EPSS exploit prediction: 0% (30th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-266
Affected product: Hashicorp Consul
Published: 2023-08-09
Last modified: 2026-06-17

Description

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.

Frequently asked questions

What is CVE-2023-3518?: 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.
How severe is CVE-2023-3518?: CVE-2023-3518 has a CVSS 3.x base score of 7.4, rated high severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is low, integrity low, and availability low.
Is CVE-2023-3518 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (30th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2023-3518?: CVE-2023-3518 primarily affects Hashicorp Consul. In total, 3 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2023-3518?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
When was CVE-2023-3518 published?: CVE-2023-3518 was published on 2023-08-09 and last updated on 2026-06-17.

References

https://discuss.hashicorp.com/t/hcsec-2023-25-consul-jwt-auth-in-l7-intentions-allow-for-mismatched-service-identity-and-jwt-providers/57004

Affected products (3)

cpe:2.3:a:hashicorp:consul:1.16.0:*:*:*:enterprise:*:*:*
cpe:2.3:a:hashicorp:consul:1.16.0:-:*:*:-:*:*:*
cpe:2.3:a:hashicorp:consul:1.16.0:rc1:*:*:-:*:*:*

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