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CVE

CVE-2026-30967

Parse Server OAuth2 authentication adapter account takeover via identity spoofing
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CVE

CVE-2026-30967

Parse Server OAuth2 authentication adapter account takeover via identity spoofing

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.9. and 8.6.22, the OAuth2 authentication adapter, when configured without the useridField option, only verifies that a token is active via the provider's token introspection endpoint, but does not verify that the token belongs to the user identified by authData.id. An attacker with any valid OAuth2 token from the same provider can authenticate as any other user. This affects any Parse Server deployment that uses the generic OAuth2 authentication adapter (configured with oauth2: true) without setting the useridField option. This vulnerability is fixed in 9.5.2-alpha.9. and 8.6.22.

Package Versions Affected

Package Version
patch Availability
No items found.

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CVSS Version

Severity
Base Score
CVSS Version
Score Vector
C
H
U
7.6
-
4.0
CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/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
C
H
U
0
-
C
H
U
8.8
-
3.1
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Related Resources

No items found.

References

https://github.com/parse-community/parse-server/releases/tag/8.6.22, https://github.com/parse-community/parse-server/releases/tag/9.5.2-alpha.9, https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/30xxx/CVE-2026-30967.json, https://github.com/parse-community/parse-server/security/advisories/GHSA-fr88-w35c-r596, https://nvd.nist.gov/vuln/detail/CVE-2026-30967

Severity

0

CVSS Score
0
10

Basic Information

Base CVSS
0
EPSS Probability
0.00127%
EPSS Percentile
0.31651%
Introduced Version
0
Fix Available
fa24c2c5f88f894d11e315d057d784f82b2893a7

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