CVE-2026-30965
Parse Server session token exfiltration via `redirectClassNameForKey` query parameter
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.
INFO
Published Date :
March 10, 2026, 9:16 p.m.
Last Modified :
March 11, 2026, 3:31 p.m.
Remotely Exploit :
Yes !
Source :
[email protected]
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS 3.1 | CRITICAL | [email protected] | ||||
| CVSS 4.0 | CRITICAL | [email protected] |
Solution
- Update Parse Server to a fixed version.
- Apply patches provided by the vendor.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2026-30965.
| URL | Resource |
|---|---|
| https://github.com/parse-community/parse-server/releases/tag/8.6.21 | Product Release Notes |
| https://github.com/parse-community/parse-server/releases/tag/9.5.2-alpha.8 | Product Release Notes |
| https://github.com/parse-community/parse-server/security/advisories/GHSA-6r2j-cxgf-495f | Vendor Advisory Mitigation |
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-30965 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2026-30965
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2026-30965 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2026-30965 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
Initial Analysis by [email protected]
Mar. 11, 2026
Action Type Old Value New Value Added CVSS V3.1 AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N Added CPE Configuration OR *cpe:2.3:a:parseplatform:parse-server:9.5.2:alpha1:*:*:*:node.js:*:* *cpe:2.3:a:parseplatform:parse-server:9.5.2:alpha2:*:*:*:node.js:*:* *cpe:2.3:a:parseplatform:parse-server:9.5.2:alpha3:*:*:*:node.js:*:* *cpe:2.3:a:parseplatform:parse-server:9.5.2:alpha4:*:*:*:node.js:*:* *cpe:2.3:a:parseplatform:parse-server:9.5.2:alpha5:*:*:*:node.js:*:* *cpe:2.3:a:parseplatform:parse-server:9.5.2:alpha6:*:*:*:node.js:*:* *cpe:2.3:a:parseplatform:parse-server:9.5.2:alpha7:*:*:*:node.js:*:* *cpe:2.3:a:parseplatform:parse-server:*:*:*:*:*:node.js:*:* versions from (including) 9.0.0 up to (excluding) 9.5.2 *cpe:2.3:a:parseplatform:parse-server:*:*:*:*:*:node.js:*:* versions up to (excluding) 8.6.21 Added Reference Type GitHub, Inc.: https://github.com/parse-community/parse-server/releases/tag/8.6.21 Types: Product, Release Notes Added Reference Type GitHub, Inc.: https://github.com/parse-community/parse-server/releases/tag/9.5.2-alpha.8 Types: Product, Release Notes Added Reference Type GitHub, Inc.: https://github.com/parse-community/parse-server/security/advisories/GHSA-6r2j-cxgf-495f Types: Mitigation, Vendor Advisory -
New CVE Received by [email protected]
Mar. 10, 2026
Action Type Old Value New Value Added 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. Added CVSS V4.0 AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:N/SC:H/SI:H/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X Added CWE CWE-863 Added Reference https://github.com/parse-community/parse-server/releases/tag/8.6.21 Added Reference https://github.com/parse-community/parse-server/releases/tag/9.5.2-alpha.8 Added Reference https://github.com/parse-community/parse-server/security/advisories/GHSA-6r2j-cxgf-495f