CVE-2026-30835 Parse Server: Malformed `$regex` query leaks database error details in API response
Attackers can leak database internals like error codes and topology details by sending malformed regex queries to Parse Server.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-30835?
CVE-2026-30835 is a medium-severity vulnerability in Parseplatform Parse-Server, published on 6 Mar 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
Parse Server is an open source backend that can be deployed to any infrastructure that can run Node.js. Prior to versions 8.6.7 and 9.5.0-alpha.6, malformed $regex query parameter (e.g. [abc) causes the database to return a structured error object that is passed unsanitized through the API response. This leaks database internals such as error messages, error codes, code names, cluster timestamps, and topology details. The vulnerability is exploitable by any client that can send query requests, depending on the deployment's permission configuration. This issue has been patched in versions 8.6.7 and 9.5.0-alpha.6.
Weakness: CWE-209
Which versions are affected by CVE-2026-30835?
5 open source packages ship an affected version, including parse-server and parse. It affects 1 product.
| Package | Affected | Fixed in |
|---|---|---|
parse-server npm | All versions | 8.6.7 |
parse-server npm | All versions | 8.6.7 |
parse-server npm | From 9.0.0 | 9.5.0-alpha.6 |
parse-server npm | From 9.0.0 | 9.5.0-alpha.6 |
parse Bitnami | All versions | 9.5.0 |
Products include Parseplatform Parse-Server.
How do I fix CVE-2026-30835?
Upgrade parse-server to a fixed version for your release line: 8.6.7 or 9.5.0-alpha.6.
Is CVE-2026-30835 being exploited?
There is no known exploitation of CVE-2026-30835 in the wild and no public exploit code.
Other vulnerabilities in Parseplatform Parse-Server
- CVE-2026-30966 Parse Server role escalation and CLP bypass via direct `_Join` table write
- CVE-2024-27298 Parse Server literalizeRegexPart SQL Injection
- CVE-2022-24760 Command Injection in Parse server
- CVE-2026-30965 Parse Server session token exfiltration via `redirectClassNameForKey` query parameter
- CVE-2023-36475 Parse Server vulnerable to remote code execution via MongoDB BSON parser through prototype pollution
Sources
Also known as BIT-parse-2026-30835, GHSA-9cp7-3q5w-j92g.