Security Bulletin
Summary
Vault's Login MFA feature did not consistently enforce the lifetime of pending two-phase login requests. This may allow a user who previously completed the first authentication factor to complete MFA and obtain a Vault token after the pending request should have expired, including after the user's primary credential has been rotated. This vulnerability (CVE-2026-92738) is fixed in Vault Community Edition 2.2.2 and Vault Enterprise 2.2.2, 1.21.14, and 1.19.26.
Vulnerability Details
CVEID: CVE-2026-92738
DESCRIPTION: Vault relied on a periodic background process to remove expired pending login requests, and did not check whether a pending request had expired when it was completed. Because this process removed expired requests at a limited rate, a backlog of older pending requests could delay removal of a later expired request, allowing it to be completed after its intended lifetime. An attacker who had completed the first factor, retained the resulting pending login request, and could still satisfy the configured second factor may have been able to obtain a new Vault token after the user's primary credential had been rotated. The length of this extension depends on the size of the backlog, which an authenticated user could increase through repeated first-factor logins. This issue does not bypass the second factor. Single-phase Login MFA, in which MFA credentials are supplied with the original login request, is not affected, and pending login requests do not persist across a Vault restart or seal.
CWE: CWE-613: Insufficient Session Expiration
CVSS Source: HashiCorp Inc.
CVSS Base score: 6.8
CVSS Vector: (CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:N)
Affected Products and Versions
| Affected Product(s) | Version(s) |
| Vault Community Edition | affected from 1.10.0 up to 2.2.2 |
| Vault Enterprise | affected from 1.10.0 up to 2.2.2, unaffected from 1.19.26, 1.21.14 |
Remediation/Fixes
Customers should evaluate the risk associated with this issue and consider upgrading to Vault Community Edition 2.2.2 or Vault Enterprise 2.2.2, 1.21.14, or 1.19.26. These versions also limit the number of pending Login MFA requests per entity, per client IP address, and in total, so operators whose clients reach Vault through a load balancer or proxy should ensure client addresses are forwarded correctly to avoid users sharing a single limit.
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References
Acknowledgement
This issue was identified by an external party who reported it to HashiCorp.
Change History
13 Nov 2026: Initial Publication
*The CVSS Environment Score is customer environment specific and will ultimately impact the Overall CVSS Score. Customers can evaluate the impact of this vulnerability in their environments by accessing the links in the Reference section of this Security Bulletin.
Disclaimer
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Document Location
Worldwide
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Document Information
Modified date:
13 November 2026
Initial Publish date:
13 November 2026
UID
ibm17296773