PT-2026-26791 · Unknown · Parse Server

Mith36 · Published 2026-03-20 · Updated 2026-03-27 · CVE-2026-33508

Positive Technologies (AI Summary)

CVSS v4.0

8.2

High

Base vector

AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N

Name of the Vulnerable Software and Affected Versions Parse Server versions prior to 8.6.56 Parse Server versions prior to 9.6.0-alpha.45

Description Parse Server’s LiveQuery component does not enforce the requestComplexity.queryDepth configuration setting when processing WebSocket subscription requests. An attacker can send a subscription with deeply nested logical operators, causing excessive recursion and CPU consumption that degrades or disrupts service availability. This affects deployments where the LiveQuery WebSocket endpoint is reachable by untrusted clients.

Recommendations Upgrade to Parse Server version 8.6.56 or later. Upgrade to Parse Server version 9.6.0-alpha.45 or later.

Exploit

Fix

Uncontrolled Recursion

Weakness Enumeration

CWE-674

Related Identifiers

BIT-PARSE-2026-33508

CVE-2026-33508

GHSA-6QH5-M6G3-XHQ6

Affected Products

Parse Server

References · 11

• 🔥 https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/33xxx/CVE-2026-33508.json · Exploit
• https://github.com/parse-community/parse-server/security/advisories/GHSA-6qh5-m6g3-xhq6 · Vendor Advisory
• https://github.com/parse-community/parse-server/commit/060d27053fb0fadf613c25aabab7fe0c82b7a899 · Patch
• https://github.com/parse-community/parse-server/commit/2126fe4e12f9b399dc6b4b6a3fa70cb1825f159b · Patch
• https://osv.dev/vulnerability/GHSA-6qh5-m6g3-xhq6 · Vendor Advisory
• https://osv.dev/vulnerability/BIT-parse-2026-33508 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2026-33508 · Security Note
• https://osv.dev/vulnerability/CVE-2026-33508 · Vendor Advisory
• https://github.com/parse-community/parse-server/pull/10260 · Note
• https://github.com/parse-community/parse-server/pull/10259 · Note
• https://github.com/parse-community/parse-server · Note