Description
Parse Server is an open source backend that can be deployed to any infrastructure that can run Node.js. Prior to 9.5.2-alpha.8 and 8.6.21, a vulnerability in Parse Server's query handling allows an authenticated or unauthenticated attacker to exfiltrate session tokens of other users by exploiting the redirectClassNameForKey query parameter. Exfiltrated session tokens can be used to take over user accounts. The vulnerability requires the attacker to be able to create or update an object with a new relation field, which depends on the Class-Level Permissions of at least one class. This vulnerability is fixed in 9.5.2-alpha.8 and 8.6.21.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| parse-community | parse-server | >= 9.0.0 < 9.5.2-alpha.8, < 8.6.21 | — |
Automated scanner template
A ready-made Nuclei template detects this vulnerability automatically. Vulnerabilities with public scanner templates are typically probed across the internet soon after the template appears — exposed systems should be patched first.
- Parse Server < 8.6.21 / 9.x < 9.5.2 - Session Token Exfiltration http/cves/2026/CVE-2026-30965.yaml
Source: projectdiscovery/nuclei-templates (MIT) — updated daily. Only links are listed.
Affected packages
| Ecosystem | Package | Affected | Fixed | Record |
|---|---|---|---|---|
| npm | parse-server | >= 9.0.0-alpha.1, < 9.5.2-alpha.8 | 9.5.2-alpha.8 | GHSA-6r2j-cxgf-495f |
| npm | parse-server | < 8.6.21 | 8.6.21 | GHSA-6r2j-cxgf-495f |