CVE-2026-21622
Received Received - Intake
Insufficient Session Expiration in Hexpm Password Reset Enables Account Takeover

Publication date: 2026-03-05

Last updated on: 2026-04-06

Assigner: EEF

Description
Insufficient Session Expiration vulnerability in hexpm hexpm/hexpm ('Elixir.Hexpm.Accounts.PasswordReset' module) allows Account Takeover. Password reset tokens generated via the "Reset your password" flow do not expire. When a user requests a password reset, Hex sends an email containing a reset link with a token. This token remains valid indefinitely until used. There is no time-based expiration enforced. If a user's historical emails are exposed through a data breach (e.g., a leaked mailbox archive), any unused password reset email contained in that dataset could be used by an attacker to reset the victim's password. The attacker does not need current access to the victim's email account, only access to a previously leaked copy of the reset email. This vulnerability is associated with program files lib/hexpm/accounts/password_reset.ex and program routines 'Elixir.Hexpm.Accounts.PasswordReset':can_reset?/3. This issue affects hexpm: from 617e44c71f1dd9043870205f371d375c5c4d886d before bb0e42091995945deef10556f58d046a52eb7884.
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Meta Information
Published
2026-03-05
Last Modified
2026-04-06
Generated
2026-06-16
AI Q&A
2026-03-06
EPSS Evaluated
2026-06-15
NVD
CVE-2026-21622
EUVD
EUVD-2026-9876
Affected Vendors & Products
Showing 1 associated CPE
Vendor Product Version / Range
hex hexpm From 2025-10-01 (inc) to 2026-03-05 (exc)
Helpful Resources
Exploitability
CWE
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KEV
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CWE ID Description
CWE-613 According to WASC, "Insufficient Session Expiration is when a web site permits an attacker to reuse old session credentials or session IDs for authorization."
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Executive Summary

This vulnerability is an Insufficient Session Expiration issue in the hexpm hexpm system, specifically in the 'Elixir.Hexpm.Accounts.PasswordReset' module. Password reset tokens generated during the "Reset your password" process do not expire over time. When a user requests a password reset, Hex sends an email with a reset link containing a token that remains valid indefinitely until it is used.

Because these tokens never expire, if an attacker gains access to a user's old emails (for example, through a data breach or leaked mailbox archive), they can use any unused password reset email to reset the victim's password. The attacker does not need current access to the victim's email account, only access to a previously leaked copy of the reset email.

Impact Analysis

This vulnerability can lead to an account takeover. An attacker who obtains a previously leaked password reset email can reset the victim's password and gain unauthorized access to their account. This compromises the security and privacy of the affected user's account and any sensitive data or services associated with it.

Compliance Impact

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Detection Guidance

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