High 7.6Published Mar 10, 2026

CVE-2026-30967Parse Server OAuth2 authentication adapter account takeover via identity spoofing

Updated under an hour ago (Oct 26, 2026, 9:50 PM ET)

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It affects parse-community parse-server and 1 other product. Add what you run to find out whether that includes you.

No exploitation reported and no EPSS estimate yet.

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Exploited in the last 30 days

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.

CVSS: 7.6 HIGH (v4.0, CNA)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
Weakness (CWE): CWE-287
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: GitHub_M
NVD analysis: Analyzed
Record last updated: Mar 11, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

parse-community parse-server parse_community:parse_server (from the name)	from 9.0.0 < 9.5.2-alpha.9; before 8.6.22	CNA record
parseplatform parse-server parseplatform:parse-server	before 8.6.22; from 9.0.0 before 9.5.2; 9.5.2; 9.5.2; 9.5.2; 9.5.2; 9.5.2; 9.5.2; and 2 more ranges	NVD

References

References

https://github.com/parse-community/parse-server/security/advisories/GHSA-fr88-w35c-r596	x-refsource-confirm, patch, vendor-advisory
https://github.com/parse-community/parse-server/releases/tag/8.6.22	x-refsource-misc, product, release-notes
https://github.com/parse-community/parse-server/releases/tag/9.5.2-alpha.9	x-refsource-misc, product, release-notes

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.