CVE-2026-30965

EUVD-2026-10880
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.
ProviderTypeBase ScoreAtk. VectorAtk. ComplexityPriv. RequiredVector
NISTPrimary
9.1 CRITICAL
NETWORK
LOW
NONE
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
Base Score
CVSS 3.x
EPSS Score
Percentile: Unknown
Affected Products (NVD)
VendorProductVersion
parseplatformparse-server
𝑥
< 8.6.21
parseplatformparse-server
9.0.0 ≤
𝑥
< 9.5.2
parseplatformparse-server
9.5.2:alpha1
parseplatformparse-server
9.5.2:alpha2
parseplatformparse-server
9.5.2:alpha3
parseplatformparse-server
9.5.2:alpha4
parseplatformparse-server
9.5.2:alpha5
parseplatformparse-server
9.5.2:alpha6
parseplatformparse-server
9.5.2:alpha7
𝑥
= Vulnerable software versions
Common Weakness Enumeration
References
https://github.com/parse-community/parse-server/releases/tag/8.6.21
https://github.com/parse-community/parse-server/releases/tag/9.5.2-alpha.8
https://github.com/parse-community/parse-server/security/advisories/GHSA-6r2j-cxgf-495f