CVE-2026-34363

HIGH EPSS 28.5%
Published Mar 31, 20263mo ago · Modified Jun 17, 20261w ago
8.2 CVSS 4.0
High
Find Similar
Published Mar 31, 2026 3mo ago
Last Modified Jun 17, 2026 1w ago

Description

Parse Server is an open source backend that can be deployed to any infrastructure that can run Node.js. Prior to versions 8.6.65 and 9.7.0-alpha.9, when multiple clients subscribe to the same class via LiveQuery, the event handlers process each subscriber concurrently using shared mutable objects. The sensitive data filter modifies these shared objects in-place, so when one subscriber's filter removes a protected field, subsequent subscribers may receive the already-filtered object. This can cause protected fields and authentication data to leak to clients that should not see them, or cause clients that should see the data to receive an incomplete object. Additionally, when an afterEvent Cloud Code trigger is registered, one subscriber's trigger modifications can leak to other subscribers through the same shared mutable state. Any Parse Server deployment using LiveQuery with protected fields or afterEvent triggers is affected when multiple clients subscribe to the same class. This issue has been patched in versions 8.6.65 and 9.7.0-alpha.9.

CVSS Details

Base Score
8.2
Exploitability
—
Impact
—
Vector string
CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/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
Attack Vector Network
Attack Complexity Low
Privileges Required None
User Interaction None
Scope X

Threat Intelligence

EPSS Exploit Probability
28.5% percentile
Exploit & Patch Status
No Known Exploit
Patch Available

Weaknesses 1

CWE-362

Affected Products 10

VendorProductVersionRange
parseplatformparse-server* <8.6.65
parseplatformparse-server*≥9.0.0  –  <9.7.0
parseplatformparse-server9.7.0any
parseplatformparse-server9.7.0any
parseplatformparse-server9.7.0any
parseplatformparse-server9.7.0any
parseplatformparse-server9.7.0any
parseplatformparse-server9.7.0any
parseplatformparse-server9.7.0any
parseplatformparse-server9.7.0any

References 5

  • github.com https://github.com/parse-community/parse-server/commit/5834e29234593addaa0251a85f572ad4f376320b
    Patch
  • github.com https://github.com/parse-community/parse-server/commit/776c71c3078e77d38c94937f463741793609d055
    Patch
  • github.com https://github.com/parse-community/parse-server/pull/10330
    Issue TrackingPatch
  • github.com https://github.com/parse-community/parse-server/pull/10331
    Issue TrackingPatch
  • github.com https://github.com/parse-community/parse-server/security/advisories/GHSA-m983-v2ff-wq65
    PatchVendor Advisory

Remediation

  • github.com https://github.com/parse-community/parse-server/commit/5834e29234593addaa0251a85f572ad4f376320b
    Patch
  • github.com https://github.com/parse-community/parse-server/commit/776c71c3078e77d38c94937f463741793609d055
    Patch
  • github.com https://github.com/parse-community/parse-server/pull/10330
    Issue TrackingPatch
  • github.com https://github.com/parse-community/parse-server/pull/10331
    Issue TrackingPatch
  • github.com https://github.com/parse-community/parse-server/security/advisories/GHSA-m983-v2ff-wq65
    PatchVendor Advisory