CVE-2026-31872
Parse Server CLP bypass via dot notation enables field-value enumeration.
WAF coverage: Network-reachable. Generic WAF signatures may reduce blast radius. No CWE mapping to be precise.
Also consider: patch
Is CVE-2026-31872 being exploited?
Not confirmed. CVE-2026-31872 does not appear in CISA's Known Exploited Vulnerabilities catalog, which records only exploitation that has been observed and reported publicly. That is evidence of absence of a report, not evidence the flaw is unattacked. EPSS currently estimates a 0.37% probability of exploitation in the next 30 days.
How severe is CVE-2026-31872?
CVE-2026-31872 is rated High with a CVSS score of 8.7. Severity describes how bad exploitation would be, not how likely it is: pair it with exploitation evidence before deciding what to patch first.
Is there a patch for CVE-2026-31872?
Yes. A fix has been recorded for CVE-2026-31872. The vendor advisory is the authority on the exact fixed version — apply it from there rather than from a summary.
What does CVE-2026-31872 affect?
CVE-2026-31872 affects Parse Server (pre-9.6.0-alpha.6, pre-8.6.32), MongoDB, PostgreSQL. Confirm the exact affected versions against the vendor advisory before deciding you are exposed.
What should I do about CVE-2026-31872?
Upgrade to 9.6.0-alpha.6 / 8.6.32+ of Parse Server
Exploitation status reflects CISA's KEV catalog as we last synced it. Check the catalog directly.
Dot-notation bypasses protectedFields CLP to query/sort by sub-fields, enabling enumeration of protected values on MongoDB/PostgreSQL.
Patch when possible
- affected>= 9.0.0 and < 9.6.0-alpha.6
- affected< 8.6.32
As published in the CVE Program record. A version outside these ranges is not a statement that it is unaffected — vendors sometimes understate a range, and distribution-backported builds carry upstream numbers that do not reflect what was patched into them.