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GHSA-69xg-f649-w5g2

MediumCVSS 6.3 / 10

Published Mar 13, 2026·Last modified Mar 16, 2026

Affected Components(0)

No affected components available

Description

Impact

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.

Patches

The fix corrects the parameter alignment in the OAuth2 adapter's app ID validation method to match the expected interface, ensuring the correct access token is sent to the introspection endpoint.

Workarounds

There is no known workaround.

References

GitHub security advisory: https://github.com/parse-community/parse-server/security/advisories/GHSA-69xg-f649-w5g2
Fix in Parse Server 9: https://github.com/parse-community/parse-server/releases/tag/9.6.0-alpha.13
Fix in Parse Server 8: https://github.com/parse-community/parse-server/releases/tag/8.6.39

Risk Scores

Base Score

6.3

The vulnerability can be exploited over the network without needing physical access. It is difficult for an attacker to exploit this vulnerability and may require special conditions. An attacker does not need any special privileges or access rights. No user interaction is needed for the attacker to exploit this vulnerability.

Threat Intelligence

1.7

Limited exploitation activity has been observed. Close monitoring and planned remediation are recommended.

EPSS

0.28%

The exploit probability is very low. The vulnerability is unlikely to be exploited in the next 30 days.

Exploit

Not available

We did not find any exploit available. Neither in GitHub repositories nor in the Exploit-Database.

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