# CVE-2026-30854: Parse Server: GraphQL `__type` introspection bypass via inline fragments when public introspection is disabled

> Unauthenticated attackers can bypass disabled GraphQL introspection controls to perform type reconnaissance on Parse Server instances.

- **Severity:** Medium 6.9 (`CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** Yes
- **Published:** 7 Mar 2026
- **Updated:** 9 Mar 2026
- **Also known as:** BIT-parse-2026-30854, GHSA-q5q9-2rhp-33qw

## What is CVE-2026-30854?

CVE-2026-30854 is a medium-severity vulnerability in Parseplatform Parse-Server, published on 7 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. From version 9.3.1-alpha.3 to before version 9.5.0-alpha.10, when graphQLPublicIntrospection is disabled, __type queries nested inside inline fragments (e.g. ... on Query { __type(name:"User") { name } }) bypass the introspection control, allowing unauthenticated users to perform type reconnaissance. __schema introspection is not affected. This issue has been patched in version 9.5.0-alpha.10.

Weakness: CWE-863 (Incorrect Authorization)

## Which versions are affected by CVE-2026-30854?

3 open source packages ship an affected version, including parse-server and parse. It affects 1 product.


| Package | Ecosystem | Affected | Fixed in |
| --- | --- | --- | --- |
| `parse-server` | npm | From 9.3.1-alpha.3 | 9.5.0-alpha.10 |
| `parse-server` | npm | From 9.3.1-alpha.3 | 9.5.0-alpha.10 |
| `parse` | Bitnami | From 9.3.1 | 9.5.0 |

Products: Parseplatform Parse-Server.

## How do I fix CVE-2026-30854?

Upgrade parse-server to 9.5.0-alpha.10 or later.

## Is CVE-2026-30854 being exploited?

There is no known exploitation of CVE-2026-30854 in the wild and no public exploit code.

## Other vulnerabilities in Parseplatform Parse-Server

- [CVE-2026-30966](https://insights.sbomify.com/CVE-2026-30966/): Parse Server role escalation and CLP bypass via direct `_Join` table write (critical 10.0)
- [CVE-2024-27298](https://insights.sbomify.com/CVE-2024-27298/): Parse Server literalizeRegexPart SQL Injection (critical 10.0)
- [CVE-2022-24760](https://insights.sbomify.com/CVE-2022-24760/): Command Injection in Parse server (critical 10.0)
- [CVE-2026-30965](https://insights.sbomify.com/CVE-2026-30965/): Parse Server session token exfiltration via `redirectClassNameForKey` query parameter (critical 9.9)
- [CVE-2023-36475](https://insights.sbomify.com/CVE-2023-36475/): Parse Server vulnerable to remote code execution via MongoDB BSON parser through prototype pollution (critical 9.8)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-30854 and fix it if it is affected.

What it is: CVE-2026-30854 is a medium-severity vulnerability in Parseplatform Parse-Server, published on 7 Mar 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2026-30854 in the wild and no public exploit code.

Affected packages and fixed versions:
- parse-server (npm): affected from 9.3.1-alpha.3; fixed in 9.5.0-alpha.10
- parse-server (npm): affected from 9.3.1-alpha.3; fixed in 9.5.0-alpha.10
- parse (Bitnami): affected from 9.3.1; fixed in 9.5.0

Task:
1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.
2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.
3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.
4. Run the tests and summarise what changed and why.
5. If nothing in the project is affected, say so and change nothing.

Reference: https://insights.sbomify.com/CVE-2026-30854/ (Markdown: https://insights.sbomify.com/CVE-2026-30854/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-30854
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-30854
- OSV: https://osv.dev/vulnerability/CVE-2026-30854

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-30854/
Summaries are generated and may contain mistakes; the official description above is the record.