CVE-2026-33409

EUVD-2026-14966
Parse Server is an open source backend that can be deployed to any infrastructure that can run Node.js. Prior to versions 8.6.52 and 9.6.0-alpha.41, an authentication bypass vulnerability allows an attacker to log in as any user who has linked a third-party authentication provider, without knowing the user's credentials. The attacker only needs to know the user's provider ID to gain full access to their account, including a valid session token. This affects Parse Server deployments where the server option allowExpiredAuthDataToken is set to true. The default value is false. This issue has been patched in versions 8.6.52 and 9.6.0-alpha.41.
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
< 8.6.52
parseplatformparse-server
9.0.0 ≤
𝑥
< 9.6.0
parseplatformparse-server
9.6.0:alpha1
parseplatformparse-server
9.6.0:alpha10
parseplatformparse-server
9.6.0:alpha11
parseplatformparse-server
9.6.0:alpha12
parseplatformparse-server
9.6.0:alpha13
parseplatformparse-server
9.6.0:alpha14
parseplatformparse-server
9.6.0:alpha15
parseplatformparse-server
9.6.0:alpha16
parseplatformparse-server
9.6.0:alpha17
parseplatformparse-server
9.6.0:alpha18
parseplatformparse-server
9.6.0:alpha19
parseplatformparse-server
9.6.0:alpha2
parseplatformparse-server
9.6.0:alpha20
parseplatformparse-server
9.6.0:alpha21
parseplatformparse-server
9.6.0:alpha22
parseplatformparse-server
9.6.0:alpha23
parseplatformparse-server
9.6.0:alpha24
parseplatformparse-server
9.6.0:alpha25
parseplatformparse-server
9.6.0:alpha26
parseplatformparse-server
9.6.0:alpha27
parseplatformparse-server
9.6.0:alpha28
parseplatformparse-server
9.6.0:alpha29
parseplatformparse-server
9.6.0:alpha3
parseplatformparse-server
9.6.0:alpha30
parseplatformparse-server
9.6.0:alpha31
parseplatformparse-server
9.6.0:alpha32
parseplatformparse-server
9.6.0:alpha33
parseplatformparse-server
9.6.0:alpha34
parseplatformparse-server
9.6.0:alpha35
parseplatformparse-server
9.6.0:alpha36
parseplatformparse-server
9.6.0:alpha37
parseplatformparse-server
9.6.0:alpha38
parseplatformparse-server
9.6.0:alpha39
parseplatformparse-server
9.6.0:alpha4
parseplatformparse-server
9.6.0:alpha40
parseplatformparse-server
9.6.0:alpha5
parseplatformparse-server
9.6.0:alpha6
parseplatformparse-server
9.6.0:alpha7
parseplatformparse-server
9.6.0:alpha8
parseplatformparse-server
9.6.0:alpha9
𝑥
= Vulnerable software versions