CVE-2026-33627

Description

Parse Server is an open source backend that can be deployed to any infrastructure that can run Node.js. Prior to versions 8.6.61 and 9.6.0, an authenticated user calling GET /users/me receives unsanitized auth data, including sensitive credentials such as MFA TOTP secrets and recovery codes. The endpoint internally uses master-level authentication for the session query, and the master context leaks through to the user data, bypassing auth adapter sanitization. An attacker who obtains a user's session token can extract MFA secrets to generate valid TOTP codes indefinitely. This issue has been patched in versions 8.6.61 and 9.6.0

How to fix CVE-2026-33627

To remediate CVE-2026-33627, upgrade the affected package to a fixed version below.

• —upgrade to 8.6.61 or later
• —upgrade to 9.6.0-alpha.55 or later

Is CVE-2026-33627 being exploited?

Low — EPSS is 0.4%, meaning exploitation activity has not been observed at scale.

Affected packages (2)

• from 0, < 8.6.61, >= 9.0.0, < 9.6.0
• >= 9.0.0, < 9.6.0-alpha.55

CVSS scores

References (7)

• ADVISORYnvd.nist.gov/vuln/detail/CVE-2026-33627
• PATCHgithub.com/parse-community/parse-server
• WEBgithub.com/parse-community/parse-server/commit/5b8998e6866bcf75be7b5bb625e27d23bfaf912c
• WEBgithub.com/parse-community/parse-server/commit/875cf10ac979bd60f70e7a0c534e2bc194d6982f