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CVE

CVE-2026-32242

Parse Server OAuth2 adapter shares mutable state across providers via singleton instance
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CVE

CVE-2026-32242

Parse Server OAuth2 adapter shares mutable state across providers via singleton instance

Parse Server is an open source backend that can be deployed to any infrastructure that can run Node.js. Prior to 9.6.0-alpha.11 and 8.6.37, Parse Server's built-in OAuth2 auth adapter exports a singleton instance that is reused directly across all OAuth2 provider configurations. Under concurrent authentication requests for different OAuth2 providers, one provider's token validation may execute using another provider's configuration, potentially allowing a token that should be rejected by one provider to be accepted because it is validated against a different provider's policy. Deployments that configure multiple OAuth2 providers via the oauth2: true flag are affected. This vulnerability is fixed in 9.6.0-alpha.11 and 8.6.37.

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
9.1
-
4.0
CVSS:4.0/AV:N/AC:H/AT:P/PR:N/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
7.4
-
3.1
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N

Related Resources

No items found.

References

https://github.com/parse-community/parse-server/releases/tag/8.6.37, https://github.com/parse-community/parse-server/releases/tag/9.6.0-alpha.11, https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/32xxx/CVE-2026-32242.json, https://github.com/parse-community/parse-server/security/advisories/GHSA-2cjm-2gwv-m892, https://nvd.nist.gov/vuln/detail/CVE-2026-32242

Severity

0

CVSS Score
0
10

Basic Information

Ecosystem
Base CVSS
0
EPSS Probability
0.00066%
EPSS Percentile
0.20588%
Introduced Version
532a461d30a6ed4457839f2caf5f30d5abf51a55
Fix Available
5990ad9245c4aae80489f234a1c3cf6ab4abc92e

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