# CVE-2026-116164: Parse Server 9.0.0 before 9.10.4-alpha.3 Reserved Field Name Injection via Object Writes

Status: published. Published: 2026-10-25. Updated: 2026-11-04.

Parse Server before 8.6.100 and 9.0.0 before 9.10.4-alpha.3 does not reject reserved internal field names in client object writes, allowing clients to store or clear internal fields. Attackers can write a reserved field that makes reads of an object fail on MongoDB, disrupting queries on that class for all users, or clear their own account lockout state and password history to bypass lockout and password policies.

## Remediation

No remediation reported in collected sources

## Affected products and versions

- parse-community / parse-server (parse-server): ≥ 9.0.0; < 9.10.4-alpha.3 (affected, semver); 9.10.4-alpha.3 (unaffected, semver). Source: CNA: VulnCheck
- parse-community / parse-server (parse-server): ≥ 0; < 8.6.100 (affected, semver); 8.6.100 (unaffected, semver). Source: CNA: VulnCheck

## Severity and prioritization

- CVSS 4.0: 6.3 (medium); CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N; source: CNA: VulnCheck

- CISA KEV: No listing in collected sources

- EPSS: 0.34% as of 2026-11-04; percentile 28.05%

- SSVC: exploitation none; automatable yes; technical impact partial; source ADP: CISA-ADP

- Weaknesses: CWE-20

## Exploit evidence

No exploit evidence in collected sources. This is not proof of no exploitation.

## References

- https://github.com/parse-community/parse-server/security/advisories/GHSA-gwrq-q25v-g8mr (CNA: VulnCheck; vendor-advisory)

- https://www.vulncheck.com/advisories/parse-server-9.0.0-before-9.10.4-alpha.3-reserved-field-name-injection-via-object-writes (CNA: VulnCheck; third-party-advisory)

## Provenance

- CNA: VulnCheck: https://www.cve.org/CVERecord?id=CVE-2026-116164; retrieved 2026-11-04; source updated 2026-11-04

- FIRST EPSS: https://api.first.org/data/v1/epss?cve=CVE-2026-116164; retrieved 2026-11-04; source updated Not reported

Revision: 7987cfbd67a3c84e5057c31802c54b6e5597475a66100bec6682f552a870cd15

Canonical: https://y2.dev/cve/CVE-2026-116164

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Collected public records only. Check source status for coverage and freshness.