CVE-2026-109954

Parse Server 9.0.0 before 9.10.2-alpha.5 Transactional Batch Request Write Interference

State: Published
Severity: 8.3 High
Published: Oct 13, 2026
Updated: Oct 13, 2026
Reserved: Oct 13, 2026

Description

Parse Server 5.4.0 before 8.6.96 and 9.0.0 before 9.10.2-alpha.5 shares transactional batch state across concurrent requests, letting any client's transactional batch request interfere with other clients' database writes. On PostgreSQL or MongoDB replica sets and sharded clusters, other clients' acknowledged writes are rolled back if the batch fails, and PostgreSQL transactions can remain open indefinitely, causing subsequent writes to fail.

Scores

CVSS	Score	Vector	Source
4.0	8.3 High	CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:L/VA:H/SC:N/SI:N/SA:N	VulnCheck
3.1	6.5 Medium	CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:H	VulnCheck

Weaknesses

CWE-362 Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')

Affected Products

Product	Versions
parse-serverparse-community	9.0.0 to before 9.10.2-alpha.5Affected 9.10.2-alpha.5Not affected
parse-serverparse-community	5.4.0 to before 8.6.96Affected 8.6.96Not affected

References

GitHub Security Advisory (GHSA-jhh9-hrgh-c9gv)vendor-advisory
VulnCheck Advisory: Parse Server 9.0.0 before 9.10.2-alpha.5 Transactional Batch Request Write Interferencethird-party-advisory

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