{"cve":"CVE-2021-28156","nvd":{"published":"2021-04-20T16:15:10.407","modified":"2026-06-17T03:45:53.873","status":"Modified","description":"HashiCorp Consul Enterprise version 1.8.0 up to 1.9.4 audit log can be bypassed by specifically crafted HTTP events. Fixed in 1.9.5, and 1.8.10.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N","score":7.5},"cwes":[],"references":["https://discuss.hashicorp.com/t/hcsec-2021-08-consul-enterprise-audit-log-bypass-for-http-events/23369","https://security.gentoo.org/glsa/202208-09","https://www.hashicorp.com/blog/category/consul","https://discuss.hashicorp.com/t/hcsec-2021-08-consul-enterprise-audit-log-bypass-for-http-events/23369","https://security.gentoo.org/glsa/202208-09"],"products":["hashicorp:consul"],"source":"nvd","synced_at":"2026-10-19T21:17:01.373894544+00:00"},"epss":{"cve":"CVE-2021-28156","score":0.02292,"percentile":0.83237,"date":"2026-10-31"},"kev":null,"osv":[],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}