EUVD-2026-17502
GHSA-f6j3-w9v3-cq22
Severity by source
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Primary rating from GitHub Advisory · only source for this CVE.
CVSS VectorGitHub Advisory
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Lifecycle Timeline
4DescriptionGitHub Advisory
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-alpha.14, 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-alpha.14.
AnalysisAI
Authenticated users in Parse Server prior to versions 8.6.69 and 9.7.0-alpha.14 can bypass immutability protections on session fields by submitting null values in PUT requests to the session update endpoint, allowing indefinite session validity and circumventing configured session expiration policies. The vulnerability requires valid authentication credentials to exploit and has been patched in the specified versions.
Technical ContextAI
Parse Server is a Node.js-based backend framework that manages user sessions and enforces field immutability constraints to prevent tampering with critical session metadata. The vulnerability exists in the session update endpoint's input validation logic, which fails to properly enforce immutability guards on the expiresAt and createdWith fields when null values are submitted. This is a type of CWE-697 (Incorrect Comparison) or similar logic flaw where the validation mechanism does not correctly identify null as an invalid mutation attempt. The affected CPE is cpe:2.3:a:parse-community:parse-server:*:*:*:*:*:*:*:* for all versions prior to the patched releases. The root cause involves inadequate boundary checking or type handling in the immutability enforcement layer, allowing authenticated attackers to bypass access control logic designed to prevent session field modifications.
RemediationAI
Vendor-released patch: Upgrade Parse Server to version 8.6.69 or later for the 8.x branch, or to version 9.7.0-alpha.14 or later for the 9.x branch. These versions include fixes implemented in commits 90802969fc713b7bc9733d7255c7519a6ed75d21 and ebccd7fe2708007e62f705ee1c820a6766178777, and merged via pull requests #10347 and #10348. Review and test the upgrade in a staging environment to ensure compatibility with your deployment. As an immediate workaround prior to upgrade, apply stricter input validation at the application or API gateway level to reject null values for session immutable fields, or temporarily restrict session update operations to trusted clients only. Verify that session expiration policies are enforced server-side and monitor for suspicious session extension patterns in audit logs.
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Same weakness CWE-697 – Incorrect Comparison
View allSame technique Authentication Bypass
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External POC / Exploit Code
Leaving vuln.today