CVE-2021-41803Network attack vector

Unauthorized token and certificate issuance

Published Sep 23, 2022 · Updated May 27, 2025

Missing authorization in HashiCorp Consul through 1.11.8, 1.12.4, and 1.13.1 lets remote authenticated users obtain unintended TLS certificates and ACL tokens. The auto-config RPC interpolates unvalidated node or segment names into JWT claim assertions, allowing a specially crafted request to satisfy assertions for another node name. Exploitation requires access to the auto-config interface and a usable JWT; the consequence is unauthorized security-material issuance rather than arbitrary code execution.

CVSS severity7.1
High
EPSS probability0.88%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Missing authorization in HashiCorp Consul through 1.11.8, 1.12.4, and 1.13.1 lets remote authenticated users obtain unintended TLS certificates and ACL tokens. The auto-config RPC interpolates unvalidated node or segment names into JWT claim assertions, allowing a specially crafted request to satisfy assertions for another node name. Exploitation requires access to the auto-config interface and a usable JWT; the consequence is unauthorized security-material issuance rather than arbitrary code execution.

The record

CVE
CVE-2021-41803
Published
Sep 23, 2022
Updated
May 27, 2025
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-862, T1078
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Sep 23, 2022CVE publishedPublication date reported by the CVE source.
  2. May 27, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

7.1NVDCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-862Missing Authorization
T1078Valid Accounts

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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