Is CVE-2026-34574 exploited in the wild?

No. Junglewise Threat Intelligence has no report of CVE-2026-34574 being exploited in the wild.

How severe is CVE-2026-34574?

Medium severity, with a CVSS score of 5.4, published 31 March 2026.

Which products and versions are affected?

parse-server (npm) SEMVER:introduced=9.0.0,fixed=9.7.0-alpha.14.

Is there a fix for CVE-2026-34574?

Yes. parse-server (npm): upgrade to 9.7.0-alpha.14 or later. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

How is CVE-2026-34574 attacked?

It is attacked over the network, in a software library.

Am I affected by CVE-2026-34574?

Check whether you run parse-server (npm) at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

CVE-2026-34574: Parse Platform Parse Server session immutability bypass

CVE-2026-34574 · Severity: medium · CVSS 5.4 · Published 2026-03-31

Parse Server is an open-source backend used to power mobile and web applications. A security flaw allows logged-in users to modify their own session data to prevent their login from ever expiring. This could allow an attacker to maintain permanent access to an account even if security policies require periodic re-authentication.

Technologies: parse-server (npm). Vendors: npm.

Quick answers

Is CVE-2026-34574 exploited in the wild?: No. Junglewise Threat Intelligence has no report of CVE-2026-34574 being exploited in the wild.
How severe is CVE-2026-34574?: Medium severity, with a CVSS score of 5.4, published 31 March 2026.
Which products and versions are affected?: parse-server (npm) SEMVER:introduced=9.0.0,fixed=9.7.0-alpha.14.
Is there a fix for CVE-2026-34574?: Yes. parse-server (npm): upgrade to 9.7.0-alpha.14 or later. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.
How is CVE-2026-34574 attacked?: It is attacked over the network, in a software library.
Am I affected by CVE-2026-34574?: Check whether you run parse-server (npm) at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

How to fix

parse-server (npm): upgrade to 9.7.0-alpha.14 or later
```
npm install parse-server@9.7.0-alpha.14
```

Technical details

A vulnerability in Parse Server's session management allows authenticated users to bypass immutability guards on specific session fields, such as 'expiresAt' and 'createdWith'. By sending a null value in a PUT request to the session update endpoint, the server fails to enforce the expected immutability, effectively nullifying the session's expiration timestamp. This results in the session remaining valid indefinitely, bypassing any configured session length or rotation policies. The issue stems from an incorrect comparison or 'falsy-value' guard in the backend logic. It has been patched in versions 8.6.69 and 9.7.0-alpha.14.

Affected products

Parse Platform Parse Server < 8.6.69, >= 9.0.0 < 9.7.0-alpha.14

Identifiers

CVE-2026-34574
GHSA-f6j3-w9v3-cq22

Timeline

2026-03-31: disclosed
2026-03-31: advisory
2026-03-29: patched

References

This page as Markdown. Free to reuse under CC BY 4.0 with a link back.