CVE-2026-30967

Parse Server OAuth2 authentication adapter account takeover via identity spoofing

At a glance

Severity: HIGH 7.6
EPSS: EPSS 0.35 % · percentile 29 (2026-10-27)
State: PUBLISHED
Published: 2026-03-10
Updated: 2026-03-11
Assigner: GitHub_M
NVD status: Analyzed

Description

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.

Scores

Version	Score	Vector	Scored by
CVSS 4.0	HIGH 7.6	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	GitHub_M
CVSS 4.0	HIGH 7.6	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	NVD · security-advisories@github.com (Secondary)
CVSS 3.1	HIGH 8.8	CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H	NVD · nvd@nist.gov (Primary)

Weaknesses (CWE)

CWE-287

Advisories

GHSA-fr88-w35c-r596 — Parse Server OAuth2 authentication adapter account takeover via identity spoofing

European references

ENISA EUVD · EUVD-2026-10884
GCVE · GCVE-0-2026-30967

Affected configurations (NVD CPE)

cpe:2.3:a:parseplatform:parse-server:*:*:*:*:*:node.js:*:* < 8.6.22
cpe:2.3:a:parseplatform:parse-server:*:*:*:*:*:node.js:*:* ≥ 9.0.0 < 9.5.2
cpe:2.3:a:parseplatform:parse-server:9.5.2:alpha1:*:*:*:node.js:*:*
cpe:2.3:a:parseplatform:parse-server:9.5.2:alpha2:*:*:*:node.js:*:*
cpe:2.3:a:parseplatform:parse-server:9.5.2:alpha3:*:*:*:node.js:*:*
cpe:2.3:a:parseplatform:parse-server:9.5.2:alpha4:*:*:*:node.js:*:*
cpe:2.3:a:parseplatform:parse-server:9.5.2:alpha5:*:*:*:node.js:*:*
cpe:2.3:a:parseplatform:parse-server:9.5.2:alpha6:*:*:*:node.js:*:*
cpe:2.3:a:parseplatform:parse-server:9.5.2:alpha7:*:*:*:node.js:*:*
cpe:2.3:a:parseplatform:parse-server:9.5.2:alpha8:*:*:*:node.js:*:*

Affected products

Product	Versions
parse-community · parse-server	affected >= 9.0.0 < 9.5.2-alpha.9 ; affected < 8.6.22

References

Sources

Source	Licence
CVE List (CVEProject cvelistV5)	CVE Program Terms of Use
EPSS (FIRST.org)	FIRST — attribution requested
ENISA EUVD	ENISA — reproduction authorised, source acknowledged
NVD (NIST) via fkie-cad/nvd-json-data-feeds	Public domain — this product uses data from the NVD API but is not endorsed or certified by the NVD