CVE-2026-33429

moderate-risk
Published 2026-03-24

Parse Server is an open source backend that can be deployed to any infrastructure that can run Node.js. Prior to versions 8.6.54 and 9.6.0-alpha.43, an attacker can subscribe to LiveQuery with a watch parameter targeting a protected field. Although the protected field value is properly stripped from event payloads, the presence or absence of update events reveals whether the protected field changed, creating a binary oracle. For boolean protected fields, the timing of change events is equivalent to knowing the field value. This issue has been patched in versions 8.6.54 and 9.6.0-alpha.43.

Do I need to act?

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0.01% chance of exploitation
EPSS score — low exploit probability
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Not on CISA KEV list
No confirmed active exploitation reported to CISA
?
Patch status unknown
Check vendor advisories for fix availability and mitigation guidance
5
CVSS 5.3/10 Medium
NETWORK / LOW complexity

Affected Products (20)

Affected Vendors

Parseplatform

References (5)

Patch https://github.com/parse-community/parse-server/commit/0c0a0a5a37ca821d2553119f2...
Patch https://github.com/parse-community/parse-server/commit/c62eacaf38de86913f0924058...
Issue Tracking https://github.com/parse-community/parse-server/pull/10253
Issue Tracking https://github.com/parse-community/parse-server/pull/10254
Vendor Advisory https://github.com/parse-community/parse-server/security/advisories/GHSA-qpc3-fg...
46
/ 100
moderate-risk
Severity 21/34 · High
Exploitability 0/34 · Minimal
Exposure 25/34 · High