CVE-2026-30965

Parse Server session token exfiltration via `redirectClassNameForKey` query parameter

Published Mar 10, 2026 CVSS 4.0 · 9.9 Critical EPSS 1.5% KEV · Not listed
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.

Remediation

No solution or workaround provided in the CVE record

Tracking

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Advisories

Source ID Title
Github GHSA Github GHSA GHSA-6r2j-cxgf-495f Parse Server vulnerable to session token exfiltration via `redirectClassNameForKey` query parameter
History
Type Values Removed Values Added
First Time appeared Parseplatform
Parseplatform parse-server
CPEs cpe:2.3:a:parseplatform:parse-server:*:*:*:*:*:node.js:*:*
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:*:*
Vendors & Products Parseplatform
Parseplatform parse-server
Metrics cvssV3_1

{'score': 9.1, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N'}

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'none', 'Technical Impact': 'total'}, 'version': '2.0.3'}

Type Values Removed Values Added
First Time appeared Parse Community
Parse Community parse Server
Vendors & Products Parse Community
Parse Community parse Server
Type Values Removed Values 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.
Title Parse Server session token exfiltration via `redirectClassNameForKey` query parameter
Weaknesses CWE-863
References
Metrics cvssV4_0

{'score': 9.9, 'vector': 'CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:N/SC:H/SI:H/SA:N'}

Weaknesses

Sources

Status
PUBLISHED
Assigner
GitHub_M
Published
Updated
Mar 11, 2026, 2:27 PM
Reserved
Mar 7, 2026, 5:53 PM
Status
Analyzed
Published
Mar 10, 2026, 9:16 PM
Modified
Jun 17, 2026, 10:33 AM