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🛡️ CVE-2026-26060 — fleet

🟠 CVSS 8.8 — High ✅ No Known Exploit CWE-613 NVD
8.8
CVSS Score
0 Low4 Medium7 High9 Critical10

Description

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](mailto:[email protected])

Join #fleet in [osquery Slack](https://join.slack.com/t/osquery/shared_invite/zt-h29zm0gk-s2DBtGUTW4CFel0f0IjTEw)

Credits

Fleet thanks @fuzzztf for responsibly reporting this issue.

How this vulnerability can be exploited

This issue can be reached over the network, attack complexity is low, an attacker needs low-level privileges on the target. No user interaction is required. The scope is unchanged, so the impact stays within the vulnerable component. Rated impact: confidentiality high, integrity high, availability high.

CVSS metrics in full

The score comes from this vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

  • Attack vector: Network — reachable from anywhere that can route to the service.
  • Attack complexity: Low — the attack works reliably, with no preparation.
  • Privileges required: Low — an ordinary user account is enough.
  • User interaction: None — nobody has to be tricked into anything.
  • Scope: Unchanged — the damage stays inside the vulnerable component.
  • Confidentiality impact: High — total loss, or loss the attacker controls.
  • Integrity impact: High — total loss, or loss the attacker controls.
  • Availability impact: High — total loss, or loss the attacker controls.

Weakness class

CVE-2026-26060 is classified as CWE-613: Insufficient Session Expiration. Sessions stay valid longer than they should, so an old identifier still grants access.

Affected software

CVE-2026-26060 is recorded against 2 packages.

  • fleet (fixed in 4.81.0)
  • github.com/fleetdm/fleet/v4

Timeline and source

Published on 27 March 2026 and last revised on 17 June 2026. No public exploit is currently recorded for this entry. Record sourced from NVD.

References

github.com

Other advisories for this package

fleet has other advisories on record. If you are patching this one, these are worth checking on the same host:

Same weakness in other software

These advisories are the same class of weakness (CWE-613: Insufficient Session Expiration) in other software:

Details

Severity HIGH
CVSS Score 8.8
CVSS Vector CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
CWE CWE-613
Public Exploit ✅ No
Source NVD
Published 2026-03-27
Updated 2026-08-20
Modified 2026-06-17
Fix URL N/A

Affected Packages

Software From version Fixed in
fleet — 4.81.0
github.com/fleetdm/fleet/v4 — —

Similar Threats

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ⓘ Data Notice: The information presented above has been compiled from publicly available internet sources. Boteraser aggregates this data solely for informational purposes and does not independently classify, evaluate, or endorse any findings about the vulnerabilities listed. The accuracy and completeness of this information is the sole responsibility of the original publishers. Boteraser and its operators accept no liability for any decisions made based on this data.

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