CVE-2026-30965 Parse Server session token exfiltration via `redirectClassNameForKey` query parameter
Attackers can exfiltrate user session tokens via a query parameter, enabling account takeover in Parse Server deployments.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-30965?
CVE-2026-30965 is a critical vulnerability in Parseplatform Parse-Server, published on 10 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 9.5.2-alpha.8 and 8.6.21, a vulnerability in Parse Server's query handling allows an authenticated or unauthenticated attacker to exfiltrate session tokens of other users by exploiting the redirectClassNameForKey query parameter. Exfiltrated session tokens can be used to take over user accounts. The vulnerability requires the attacker to be able to create or update an object with a new relation field, which depends on the Class-Level Permissions of at least one class. This vulnerability is fixed in 9.5.2-alpha.8 and 8.6.21.
Weakness: CWE-863
Which versions are affected by CVE-2026-30965?
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 | 8.6.21 |
parse-server npm | All versions | 8.6.21 |
parse-server npm | From 9.0.0-alpha.1 | 9.5.2-alpha.8 |
parse-server npm | From 9.0.0-alpha.1 | 9.5.2-alpha.8 |
parse Bitnami | All versions | 8.6.21, 9.5.2 |
Products include Parseplatform Parse-Server.
How do I fix CVE-2026-30965?
Upgrade parse-server to a fixed version for your release line: 8.6.21 or 9.5.2-alpha.8.
Is CVE-2026-30965 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-30965 exists.
Public exploit code: 1 Nuclei template.
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-2023-36475 Parse Server vulnerable to remote code execution via MongoDB BSON parser through prototype pollution
- CVE-2022-39396 Parse Server vulnerable to Remote Code Execution via prototype pollution in MongoDB BSON parser
Sources
Also known as BIT-parse-2026-30965, GHSA-6r2j-cxgf-495f.