CVE-2021-23727

This affects the package celery before 5.2.2. It by default trusts the messages and metadata stored in backends (result stores). When reading task metadata from the backend, the data is deserialized. Given that an attacker can gain access to, or somehow manipulate the metadata within a celery backend, they could trigger a stored command injection vulnerability and potentially gain further access to the system.

• CWE-77

• https://github.com/celery/celery/blob/master/Changelog.rst%23522Broken Link, Release Notes, Third Party Advisory
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/SYXRGHWHD2WWMHBWCVD5ULVINPKNY3P5/
• https://snyk.io/vuln/SNYK-PYTHON-CELERY-2314953Exploit, Third Party Advisory
• https://github.com/celery/celery/blob/master/Changelog.rst%23522Broken Link, Release Notes, Third Party Advisory
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/SYXRGHWHD2WWMHBWCVD5ULVINPKNY3P5/
• https://snyk.io/vuln/SNYK-PYTHON-CELERY-2314953Exploit, Third Party Advisory

Published

Dec 29, 2021

Last Modified

Jun 17, 2026

Status

Modified

• How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
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