CVE-2024-2660

Authentication bypass via mishandled multiple OCSP responses

Published Apr 4, 2024 · Updated Sep 26, 2024

Authentication bypass in HashiCorp Vault and Vault Enterprise allows attackers to authenticate using incorrect OCSP certificate status. The TLS certificate auth method's OCSP response-handling logic mishandles signatures and status responses when multiple OCSP servers are configured. Exploitation requires privileged network access and an OCSP-enabled certificate-auth deployment; a successful login grants the privileges assigned to the accepted certificate.

CVSS severity6.4
Medium
EPSS probability0.30%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Authentication bypass in HashiCorp Vault and Vault Enterprise allows attackers to authenticate using incorrect OCSP certificate status. The TLS certificate auth method's OCSP response-handling logic mishandles signatures and status responses when multiple OCSP servers are configured. Exploitation requires privileged network access and an OCSP-enabled certificate-auth deployment; a successful login grants the privileges assigned to the accepted certificate.

The record

CVE
CVE-2024-2660
Published
Apr 4, 2024
Updated
Sep 26, 2024
Vendor
HashiCorp
Product
Vault
Classifications
CWE-636
Attack vector
adjacent
Privileges
admin

Timeline

How it unfolded

  1. Apr 4, 2024CVE publishedPublication date reported by the CVE source.
  2. Sep 26, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=1.14.0 <1.16.0

What conditions does exploitation require?

Attack vectoradjacent
Required privilegesadmin

What is affected?

HashiCorp · Vaultversion=1.14.0 <1.16.0
HashiCorp · Vault Enterpriseversion=1.14.0 <1.16.0 changes=[{"at":"1.14.11","status":"unaffected"},{"at":"1.15.7","status":"unaffected"}]

Published CVSS scores

6.4HashiCorp Inc.CVSS:3.1/AV:A/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:H
6.8NIST NVDCVSS:3.1/AV:A/AC:L/PR:H/UI:N/S:U/C:H/I:H/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)
Vectoradjacent
Privilegesadmin
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-636Not Failing Securely ('Failing Open')

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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