CVE-2026-30967Network attack vector

Account takeover via unbound OAuth2 token identity

Published Mar 10, 2026 · Updated Mar 10, 2026

Improper authentication in Parse Server before 8.6.22 and 9.0.0 through 9.5.2-alpha.8 allows remote authenticated users to take over accounts. The OAuth2 adapter accepts any active provider token without binding its subject to the user named by authData.id when useridField is unset. Exploitation requires the generic OAuth2 adapter, an omitted useridField option, and any valid token from the same provider; successful login grants the victim account's access.

CVSS severity7.6
High
EPSS probability0.33%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Improper authentication in Parse Server before 8.6.22 and 9.0.0 through 9.5.2-alpha.8 allows remote authenticated users to take over accounts. The OAuth2 adapter accepts any active provider token without binding its subject to the user named by authData.id when useridField is unset. Exploitation requires the generic OAuth2 adapter, an omitted useridField option, and any valid token from the same provider; successful login grants the victim account's access.

The record

CVE
CVE-2026-30967
Published
Mar 10, 2026
Updated
Mar 10, 2026
Vendor
Parse Platform
Product
Parse Server
Classifications
CWE-287, T1078
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Mar 10, 2026CVE publishedPublication date reported by the CVE source.
  2. Mar 10, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=< 8.6.22
  2. Affected versionversion=>= 9.0.0 < 9.5.2-alpha.9

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Parse Platform · Parse Serverversion=< 8.6.22; version=>= 9.0.0 < 9.5.2-alpha.9

Published CVSS scores

7.6Parse Platform GitHub Security AdvisoryCVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-287Improper Authentication
T1078Valid Accounts

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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