CVE-2026-33539

Description

### Impact 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 `$group` pipeline stage or the `distinct` operation. This allows privilege escalation from Parse Server application-level administrator to PostgreSQL database-level access. Only Parse Server deployments using PostgreSQL are affected. MongoDB deployments are not affected. ### Patches Field names in the aggregate `$group._id` object values and `distinct` dot-notation parameters are now validated to only contain alphanumeric characters and underscores, preventing SQL injection via the `:raw` interpolation used in the PostgreSQL storage adapter. ### Workarounds No workaround. Upgrade to a patched version.

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 0.0%, 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