Missing Critical Step in Authentication Affecting devpi-server package, versions [,6.20.2)
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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Test your applications- Snyk IDSNYK-PYTHON-DEVPISERVER-20158951
- published27 Sept 2026
- disclosed18 Aug 2026
- creditUnknown
Introduced: 18 Aug 2026
CVE-2026-54723 (opens in a new tab)How to fix?
Upgrade devpi-server to version 6.20.2 or higher.
Overview
devpi-server is a devpi-server: backend for hosting private package indexes and PyPI on-demand mirrors
Affected versions of this package are vulnerable to Missing Critical Step in Authentication via the +changelog route when the replication protocol is enabled with the primary role. An attacker can access sensitive database contents, including password hashes and token information, by sending a specially crafted GET request. This can also lead to increased CPU, IO, and bandwidth usage depending on the database size. This is only exploitable if the server instance is configured with the replication protocol enabled using the primary (or deprecated master) role.
Workaround
This vulnerability can be mitigated by explicitly setting the server role to standalone when replication is not used, or by serving the instance exclusively through nginx with the devpi-lockdown plugin, which redirects unauthorized requests to the login form.