CVE-2026-116161

Parse Server 9.0.0 before 9.10.5-alpha.4 LiveQuery Information Disclosure via $or Subscriptions

State: Published
Severity: 6.0 Medium
Published: Oct 25, 2026
Updated: Oct 29, 2026
Reserved: Oct 25, 2026

Description

Parse Server before 8.6.103 and 9.0.0 before 9.10.5-alpha.4 contains an information disclosure vulnerability in LiveQuery. Its subscription hash omits constraints next to a $or operator, including the _Session owner filter and beforeSubscribe constraints, so distinct subscriptions are grouped together. Authenticated clients subscribing with $or queries can receive other users' events, including session tokens usable for impersonation.

Scores

CVSS	Score	Vector	Source
4.0	6.0 Medium	CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N	VulnCheck

Weaknesses

CWE-200 Exposure of Sensitive Information to an Unauthorized Actor

Affected Products

Product	Versions
parse-serverparse-community	9.0.0 to before 9.10.5-alpha.4Affected 9.10.5-alpha.4Not affected
parse-serverparse-community	before 8.6.103Affected 8.6.103Not affected

References

GitHub Security Advisory (GHSA-349r-988w-x3jp)vendor-advisory
VulnCheck Advisory: Parse Server 9.0.0 before 9.10.5-alpha.4 LiveQuery Information Disclosure via $or Subscriptionsthird-party-advisory

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