CVE-2026-33539

Description

Parse Server is an open source backend that can be deployed to any infrastructure that can run Node.js. Prior to versions 8.6.59 and 9.6.0, an attacker with master key access can execute arbitrary SQL statements on the PostgreSQL database by injecting SQL metacharacters into field name parameters of the aggregate $group pipeline stage or the distinct operation. This allows privilege escalation from Parse Server application-level administrator to PostgreSQL database-level access. Only Parse Server deployments using PostgreSQL are affected. MongoDB deployments are not affected. This issue has been patched in versions 8.6.59 and 9.6.0

How to fix CVE-2026-33539

To remediate CVE-2026-33539, upgrade the affected package to a fixed version below.

• —upgrade to 8.6.59 or later
• —upgrade to 9.6.0-alpha.53 or later

Is CVE-2026-33539 being exploited?

Low — EPSS is 0.5%, meaning exploitation activity has not been observed at scale.

Affected packages (2)

• from 0, < 8.6.59, >= 9.0.0, < 9.6.0
• >= 9.0.0, < 9.6.0-alpha.53

CVSS scores

References (7)

• ADVISORYnvd.nist.gov/vuln/detail/CVE-2026-33539
• PATCHgithub.com/parse-community/parse-server
• WEBgithub.com/parse-community/parse-server/commit/03249f9bf5b8783c8b848f84dab791ff0b761b8c
• WEBgithub.com/parse-community/parse-server/commit/bdddab5f8b61a40cb8fc62dd895887bdd2f3838e