What’s Vulnerable › Vulnerabilities

CVE-2021-41805

• Severity: high (CVSS 8.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 34.8% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2021-12-12 · updated 2026-06-17
• Weakness: CWE-863

Description

HashiCorp Consul Enterprise before 1.8.17, 1.9.x before 1.9.11, and 1.10.x before 1.10.4 has Incorrect Access Control. An ACL token (with the default operator:write permissions) in one namespace can be used for unintended privilege escalation in a different namespace.

Affected products

• HashiCorp Consul: from 1.7.0 before 1.8.17; from 1.9.0 before 1.9.11; from 1.10.0 before 1.10.4 — fixed in 1.10.4, 1.8.17, 1.9.11

How to fix

Upgrade to a fixed version: HashiCorp Consul 1.10.4, 1.8.17, 1.9.11. Check the vendor advisory for mitigations.

References

• https://discuss.hashicorp.com/t/hcsec-2021-29-consul-enterprise-namespace-default-acls-allow-privilege-escalation/31871
• https://security.netapp.com/advisory/ntap-20211229-0007/
• https://www.hashicorp.com/blog/category/consul
• https://discuss.hashicorp.com/t/hcsec-2021-29-consul-enterprise-namespace-default-acls-allow-privilege-escalation/31871
• https://security.netapp.com/advisory/ntap-20211229-0007/
• https://www.hashicorp.com/blog/category/consul

Get alerted when CVE-2021-41805 or the next vulnerability affects your stack