CVE-2022-23653

Application key disclosure via delayed database permission tightening

Published Feb 23, 2022 · Updated Apr 23, 2025

Key disclosure in Backblaze B2 Command-Line Tool 3.2.0 and earlier allows local users to read application keys via a file-creation race. The CLI creates its SQLite account-info file with world-readable permissions, writes API keys, and only afterward restricts access. Exploitation requires another local user to access the containing directory, win the millisecond-scale race before first authorization, and retain an open file handle to read the saved keys.

CVSS severity4.7
Medium
EPSS probability0.21%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Key disclosure in Backblaze B2 Command-Line Tool 3.2.0 and earlier allows local users to read application keys via a file-creation race. The CLI creates its SQLite account-info file with world-readable permissions, writes API keys, and only afterward restricts access. Exploitation requires another local user to access the containing directory, win the millisecond-scale race before first authorization, and retain an open file handle to read the saved keys.

The record

CVE
CVE-2022-23653
Published
Feb 23, 2022
Updated
Apr 23, 2025
Vendor
Backblaze
Product
B2 Command-Line Tool
Classifications
CWE-367, CWE-276, T1552.001
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Feb 23, 2022CVE publishedPublication date reported by the CVE source.
  2. Apr 23, 2025Record 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=< 3.2.1

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

Backblaze · B2 Command-Line Toolversion=< 3.2.1

Published CVSS scores

1.9NIST NVDAV:L/AC:M/Au:N/C:P/I:N/A:N
4.7NIST NVDCVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N

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.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-367Time-of-check Time-of-use (TOCTOU) Race Condition
CWE-276Incorrect Default Permissions
T1552.001Unsecured Credentials: Credentials In Files

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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