CVE-2026-30965
CriticalParse Server vulnerable to session token exfiltration via redirectClassNameForKey query parameter
Published Mar 11, 2026 · Updated Sep 8, 2026 · Also known as BIT-parse-2026-30965, GHSA-6r2j-cxgf-495f
Key Facts
Patch in the next maintenance window- CVE-2026-30965 is a critical-severity vulnerability (CVSS 9.9 v4) affecting Parse-Server (Parseplatform), parse (bitnami).
- It is not listed in any known-exploited vulnerabilities catalog. No public exploit code is known.
- EPSS estimates a 1.6% probability of exploitation in the next 30 days.
- Fixed versions are available, including parse 8.6.21, parse 9.5.2, Parse-Server 8.6.21.
- Brandefense priority: patch in the next maintenance window, because of its high severity, although no exploitation is known.
CVSS v4
9.9
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:N/SC:H/SI:H/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
EPSS (30-day exploit likelihood)
1.6%
Higher than 74.7% of all scored CVEs
Exploited in the wild
No known
Not in a known-exploited catalog
Public exploit code
None known
Get the full CVE-2026-30965 brief as a PDF
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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
11 affected entries in total| Product | Affected versions | Fixed in |
|---|---|---|
| Parse-ServerParseplatform | 9.5.2-alpha1, 9.5.2-alpha2, 9.5.2-alpha3, 9.5.2-alpha4, 9.5.2-alpha5, 9.5.2-alpha6, 9.5.2-alpha7, >= 9.0.0-alpha.1 | 8.6.21 |
| parsebitnami | See advisory | 8.6.21 |
Patched Releases
parse
8.6.21, 9.5.2
Parse-Server
8.6.21, 9.5.2-alpha.8
Timeline
Publicly disclosed
Mar 11, 2026
Last updated
Sep 8, 2026
Weakness Type
- CWE-863 Incorrect Authorization
References
- advisoryGHSA advisory
- advisoryhttps://github.com/CVEProject/cvelistV5/tree/main/cves/2026/30xxx/CVE-2026-30965.json
- advisoryhttps://nvd.nist.gov/vuln/detail/CVE-2026-30965
- articlehttps://github.com/parse-community/parse-server/releases/tag/8.6.21
- articlehttps://github.com/parse-community/parse-server/releases/tag/9.5.2-alpha.8
FAQ
Common Questions.
Parse Server is an open source backend that can be deployed to any infrastructure that can run Node.js.
Affected: Parse-Server (Parseplatform) versions 9.5.2-alpha1, 9.5.2-alpha2, 9.5.2-alpha3, 9.5.2-alpha4, 9.5.2-alpha5, 9.5.2-alpha6, 9.5.2-alpha7, >= 9.0.0-alpha.1; parse (bitnami). The full list is in the CVE brief.
It is not listed in any known-exploited vulnerabilities catalog.
No, it is not currently listed in the CISA Known Exploited Vulnerabilities catalog.
No public exploit code is known.
Fixed versions are available, including parse 8.6.21, parse 9.5.2, Parse-Server 8.6.21.
Brandefense priority: patch in the next maintenance window, because of its high severity, although no exploitation is known.
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