How severe is CVE-2021-38698?

CVE-2021-38698 has a CVSS 3.x base score of 6.5, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability none.

Is CVE-2021-38698 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (72nd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-38698?

CVE-2021-38698 primarily affects Hashicorp Consul. In total, 2 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2021-38698?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-2021-38698 published?

CVE-2021-38698 was published on 2021-09-07 and last updated on 2026-06-17.

CVE-2021-38698

CVE-2021-38698 is a medium-severity vulnerability in Hashicorp Consul with a CVSS 3.x base score of 6.5. 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-862.

Key facts

Severity: Medium (CVSS 3.x base score 6.5)
CVSS v2: 4.0
EPSS exploit prediction: 2% (72nd percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-862
Affected product: Hashicorp Consul
Published: 2021-09-07
Last modified: 2026-06-17

Description

HashiCorp Consul and Consul Enterprise 1.10.1 Txn.Apply endpoint allowed services to register proxies for other services, enabling access to service traffic. Fixed in 1.8.15, 1.9.9 and 1.10.2.

Frequently asked questions

What is CVE-2021-38698?: HashiCorp Consul and Consul Enterprise 1.10.1 Txn.Apply endpoint allowed services to register proxies for other services, enabling access to service traffic. Fixed in 1.8.15, 1.9.9 and 1.10.2.
How severe is CVE-2021-38698?: CVE-2021-38698 has a CVSS 3.x base score of 6.5, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability none.
Is CVE-2021-38698 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (72nd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-38698?: CVE-2021-38698 primarily affects Hashicorp Consul. In total, 2 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2021-38698?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2021-38698 published?: CVE-2021-38698 was published on 2021-09-07 and last updated on 2026-06-17.

References

Affected products (2)

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

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