Vulnerability · Published Mar 31, 2026 · Assigned by GitHub_M
CVE-2026-34574Parse Server: Session field immutability bypass via falsy-value guard
Medium 5.3
In plain English
A medium-severity security flaw in parse-server from parse-community. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.2% (higher than 12% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Official 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-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.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| npm | parse-server | 9.7.0-alpha.14 | GHSA-f6j3-w9v3-cq22 |
| npm | parse-server | 8.6.69 | GHSA-f6j3-w9v3-cq22 |
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| parse-community | parse-server | < 8.6.69>= 9.0.0, < 9.7.0-alpha.14 |
Weakness: CWE-697 · Vector: 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
References
- https://github.com/parse-community/parse-server/security/advisories/GHSA-f6j3-w9v3-cq22 x_refsource_CONFIRM
- https://github.com/parse-community/parse-server/pull/10347 x_refsource_MISC
- https://github.com/parse-community/parse-server/pull/10348 x_refsource_MISC
- https://github.com/parse-community/parse-server/commit/90802969fc713b7bc9733d7255c7519a6ed75d21 x_refsource_MISC
- https://github.com/parse-community/parse-server/commit/ebccd7fe2708007e62f705ee1c820a6766178777 x_refsource_MISC