CVE-2026-32269Network attack vector

Authentication bypass via misaligned OAuth2 validation arguments

Published Mar 12, 2026 · Updated Mar 12, 2026

Incorrect OAuth2 app ID validation in Parse Server allows remote attackers to authenticate from disallowed app contexts. OAuth2Adapter.validateAppId accepts only authData although its caller passes appIds first, so it reads the wrong argument and sends an undefined token for introspection. Exposure requires appidField and appIds plus an introspection endpoint that accepts the malformed request; other endpoints instead reject every OAuth2 login.

CVSS severity6.3
Medium
EPSS probability0.28%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Incorrect OAuth2 app ID validation in Parse Server allows remote attackers to authenticate from disallowed app contexts. OAuth2Adapter.validateAppId accepts only authData although its caller passes appIds first, so it reads the wrong argument and sends an undefined token for introspection. Exposure requires appidField and appIds plus an introspection endpoint that accepts the malformed request; other endpoints instead reject every OAuth2 login.

The record

CVE
CVE-2026-32269
Published
Mar 12, 2026
Updated
Mar 12, 2026
Vendor
Parse Platform
Product
Parse Server
Classifications
CWE-683, T1078
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Mar 12, 2026CVE publishedPublication date reported by the CVE source.
  2. Mar 12, 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=>= 8.0.2, < 8.6.39
  2. Affected versionversion=>= 9.0.0, < 9.6.0-alpha.13

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Parse Platform · Parse Serverversion=>= 8.0.2, < 8.6.39; version=>= 9.0.0, < 9.6.0-alpha.13

Published CVSS scores

6.5NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N
6.3GitHub, Inc.CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:L/VI:L/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
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-683Function Call With Incorrect Order of Arguments
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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