CVE-2026-34574

Description

Parse Server is an open source backend that can be deployed to any infrastructure that can run Node.js. Prior to versions 8.6.69 and 9.7.0, an authenticated user can bypass the immutability guard on session fields (expiresAt, createdWith) by sending a null value in a PUT request to the session update endpoint. This allows nullifying the session expiry, making the session valid indefinitely and bypassing configured session length policies. This issue has been patched in versions 8.6.69 and 9.7.0.

How to fix CVE-2026-34574

To remediate CVE-2026-34574, upgrade the affected package to a fixed version below.

• —upgrade to 8.6.69 or later
• —upgrade to 9.7.0-alpha.14 or later

Is CVE-2026-34574 being exploited?

Low — EPSS is 0.2%, meaning exploitation activity has not been observed at scale.

Affected packages (2)

• from 0, < 8.6.69, >= 9.0.0, < 9.7.0
• >= 9.0.0, < 9.7.0-alpha.14

CVSS scores

References (7)

• ADVISORYnvd.nist.gov/vuln/detail/CVE-2026-34574
• PATCHgithub.com/parse-community/parse-server
• WEBgithub.com/parse-community/parse-server/commit/90802969fc713b7bc9733d7255c7519a6ed75d21
• WEBgithub.com/parse-community/parse-server/commit/ebccd7fe2708007e62f705ee1c820a6766178777