Medium severity · published Mar 12, 2026
CVE-2026-32269
Parse Server OAuth2 adapter app ID validation sends wrong token to introspection endpoint
6.5
CVSS
0.3%
EPSS
No
On KEV
Description
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.13 and 8.6.39, the OAuth2 authentication adapter does not correctly validate app IDs when appidField and appIds are configured. During app ID validation, a malformed value is sent to the token introspection endpoint instead of the user's actual access token. Depending on the introspection endpoint's behavior, this could either cause all OAuth2 logins to fail, or allow authentication from disallowed app contexts if the endpoint returns valid-looking data for the malformed request. Deployments using the OAuth2 adapter with appidField and appIds configured are affected. This vulnerability is fixed in 9.6.0-alpha.13 and 8.6.39.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
Low
Integrity
Low
Availability
None
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.3% · higher than 21% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
PA
parse-server · parse-community
>= 9.0.0, < 9.6.0-alpha.13; >= 8.0.2, < 8.6.39 · source: vendor, NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-32269
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-32269
Release Notes
https://github.com/parse-community/parse-server/releases/tag/8.6.39
Release Notes
https://github.com/parse-community/parse-server/releases/tag/9.6.0-alpha.13
Vendor Advisory
https://github.com/parse-community/parse-server/security/advisories/GHSA-69xg-f649-w5g2
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