{"cve":"CVE-2022-23651","nvd":{"published":"2022-02-23T23:15:07.837","modified":"2026-06-17T04:30:34.030","status":"Modified","description":"b2-sdk-python is a python library to access cloud storage provided by backblaze. Linux and Mac releases of the SDK version 1.14.0 and below contain a key disclosure vulnerability that, in certain conditions, can be exploited by local attackers through a time-of-check-time-of-use (TOCTOU) race condition. SDK users of the SqliteAccountInfo format are vulnerable while users of the InMemoryAccountInfo format are safe. The SqliteAccountInfo saves API keys (and bucket name-to-id mapping) in a local database file ($XDG_CONFIG_HOME/b2/account_info, ~/.b2_account_info or a user-defined path). When first created, the file is world readable and is (typically a few milliseconds) later altered to be private to the user. If the directory containing the file is readable by a local attacker then during the brief period between file creation and permission modification, a local attacker can race to open the file and maintain a handle to it. This allows the local attacker to read the contents after the file after the sensitive information has been saved to it. Consumers of this SDK who rely on it to save data using SqliteAccountInfo class should upgrade to the latest version of the SDK. Those who believe a local user might have opened a handle using this race condition, should remove the affected database files and regenerate all application keys. Users should upgrade to b2-sdk-python 1.14.1 or later.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N","score":4.7},"cwes":["CWE-367"],"references":["https://github.com/Backblaze/b2-sdk-python/commit/62476638986e5b6d7459aca5ef8ce220760226e0","https://github.com/Backblaze/b2-sdk-python/security/advisories/GHSA-p867-fxfr-ph2w","https://pypi.org/project/b2sdk/","https://github.com/Backblaze/b2-sdk-python/commit/62476638986e5b6d7459aca5ef8ce220760226e0","https://github.com/Backblaze/b2-sdk-python/security/advisories/GHSA-p867-fxfr-ph2w"],"products":["backblaze:b2_python_software_development_kit"],"source":"nvd","synced_at":"2026-10-19T21:28:04.509275555+00:00"},"epss":{"cve":"CVE-2022-23651","score":0.00217,"percentile":0.12197,"date":"2026-10-31"},"kev":null,"osv":[{"id":"GHSA-p867-fxfr-ph2w","url":"https://osv.dev/vulnerability/GHSA-p867-fxfr-ph2w","summary":"b2-sdk-python TOCTOU application key disclosure ","modified":"2024-09-04T21:01:50.239481Z","packages":[{"ecosystem":"PyPI","name":"b2sdk","purl":"pkg:pypi/b2sdk","ranges":["<1.14.1"],"fixed":["1.14.1"]}]},{"id":"PYSEC-2022-33","url":"https://osv.dev/vulnerability/PYSEC-2022-33","summary":"","modified":"2023-11-08T04:08:26.607921Z","packages":[{"ecosystem":"PyPI","name":"b2sdk","purl":"pkg:pypi/b2sdk","ranges":["<1.14.1"],"fixed":["1.14.1"]}]}],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}