CVE-2026-34532
Parseplatform Parse-server broken access control
- Published31 Mar 2026
Description
Parse Server is an open source backend that can be deployed to any infrastructure that can run Node.js. Prior to versions 8.6.67 and 9.7.0-alpha.11, an attacker can bypass Cloud Function validator access controls by appending "prototype.constructor" to the function name in the URL. When a Cloud Function handler is declared using the function keyword and its validator is a plain object or arrow function, the trigger store traversal resolves the handler through its own prototype chain while the validator store fails to mirror this traversal, causing all access control enforcement to be skipped. This allows unauthenticated callers to invoke Cloud Functions that are meant to be protected by validators such as requireUser, requireMaster, or custom validation logic. This issue has been patched in versions 8.6.67 and 9.7.0-alpha.11.
CVSS 3.1 breakdown
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:NAffected products
Remediation
- https://github.com/parse-community/parse-server/commit/4fc48cf28f22eea200d74d883505f485234a48d7
- https://github.com/parse-community/parse-server/commit/dc59e272665644083c5b7f6862d88ce1ef0b2674
- https://github.com/parse-community/parse-server/pull/10342
- https://github.com/parse-community/parse-server/pull/10343
- https://github.com/parse-community/parse-server/security/advisories/GHSA-vpj2-qq7w-5qq6
References
- https://github.com/parse-community/parse-server/commit/4fc48cf28f22eea200d74d883505f485234a48d7
- https://github.com/parse-community/parse-server/commit/dc59e272665644083c5b7f6862d88ce1ef0b2674
- https://github.com/parse-community/parse-server/pull/10342
- https://github.com/parse-community/parse-server/pull/10343
- https://github.com/parse-community/parse-server/security/advisories/GHSA-vpj2-qq7w-5qq6
Related CVEs
Recent high-severity vulnerabilities sharing a weakness type.
Frequently asked
Is CVE-2026-34532 being actively exploited?
CVE-2026-34532 is not in the CISA KEV catalog. Its EPSS exploit probability is 0.49%.
How severe is CVE-2026-34532?
CVE-2026-34532 has a CVSS 3.1 base score of 9.1, rated critical. EPSS estimates a 0.49% probability of exploitation.
Which products are affected by CVE-2026-34532?
Affected products include Parseplatform Parse-server.
How do I fix CVE-2026-34532?
Upgrade affected software to a fixed version, for example Parseplatform Parse-server 9.7.0 or later, then confirm no affected versions remain in your inventory.
How Secuno handles this
Secuno correlates vulnerabilities like CVE-2026-34532 against the real software inventory on every managed device, as each hourly inventory arrives. Rather than a static severity, each match is scored in context: exploit availability, EPSS, the asset's exposure, and business criticality decide where it lands in the queue. If an affected version is present anywhere across your portfolio, it surfaces automatically with a prioritised remediation path.
Data from the NVD, CISA KEV catalog and FIRST EPSS. CVSS 3.1 base score shown where available.