CVE-2026-26060: Fleet: Password reset tokens remain valid after password change for 24 hours
Summary
A vulnerability in Fleet’s password management logic could allow previously issued password reset tokens to remain valid after a user changes their password. As a result, a stale password reset token could be reused to reset the account password even after a defensive password change.
Impact
If an attacker had prior access to a valid password reset token, they could reuse that token within its validity window to reset the user’s password after the user has already changed it. This could result in temporary account takeover.
Exploitation requires prior compromise of a password reset token and is further constrained by the token’s 24-hour expiration period. The issue does not allow discovery of reset tokens, does not bypass authentication on its own, and does not affect accounts without an existing valid reset token.
Workarounds
Until patched, users who believe a password reset token may have been exposed should wait for the token to expire before reusing the account, or contact a Fleet administrator to invalidate active sessions.
For more information
If there are any questions or comments about this advisory:
Email Fleet at security@fleetdm.com Join #fleet in osquery Slack
Credits
Fleet thanks @fuzzztf for responsibly reporting this issue.
Other sources
Fleet is open source device management software. Prior to 4.81.0, a vulnerability in Fleet’s password management logic could allow previously issued password reset tokens to remain valid after a user changes their password. As a result, a stale password reset token could be reused to reset the account password even after a defensive password change. Version 4.81.0 patches the issue.
— MITRE
Affected Software
Event History
Frequently Asked Questions
What is the severity of CVE-2026-26060?
CVE-2026-26060 is classified as a medium severity vulnerability due to the risk of unauthorized access using stale password reset tokens.
How do I fix CVE-2026-26060?
To fix CVE-2026-26060, update Fleet to version 4.43.5-0.20260113202849-bbc1aef2987d or later.
What impact does CVE-2026-26060 have on users?
CVE-2026-26060 can allow attackers to use old password reset tokens to gain unauthorized access to user accounts.
Is CVE-2026-26060 a common vulnerability?
CVE-2026-26060 highlights a common mistake in password management systems regarding token expiration.
How can I verify if my version of Fleet is vulnerable to CVE-2026-26060?
Check your Fleet version against the specified vulnerable version to determine if you are using an affected version related to CVE-2026-26060.