CVE-2026-33508 | parse-community parse-server up to 8.6.55/9.6.0-alpha.44 LiveQuery recursion (GHSA-6qh5-m6g3-xhq6)

VDB-352837 · CVE-2026-33508 · GHSA-6QH5-M6G3-XHQ6 PARSE-COMMUNITY PARSE-SERVER UP TO 8.6.55/9.6.0-ALPHA.44 LIVEQUERY RECURSION HISTORYDIFFRELATEJSONXMLCTI CVSS Meta Temp Score Current Exploit Price (≈) CTI Interest Score 5.1 $0-$5k 0.77+ Summaryinfo A vulnerability identified as problematic has been detected in parse-community parse-server up to 8.6.55/9.6.0-alpha.44. Affected by this issue is some unknown functionality of the component LiveQuery. This manipulation causes recursion. This vulnerability is tracked as CVE-2026-33508. The attack is possible to be carried out remotely. No exploit exists. You should upgrade the affected component. Detailsinfo A vulnerability classified as problematic was found in parse-community parse-server up to 8.6.55/9.6.0-alpha.44. Affected by this vulnerability is some unknown functionality of the component LiveQuery. The manipulation with an unknown input leads to a recursion vulnerability. The CWE definition for the vulnerability is CWE-674. The product does not properly control the amount of recursion that takes place, consuming excessive resources, such as allocated memory or the program stack. As an impact it is known to affect availability. The summary by CVE is: Parse Server is an open source backend that can be deployed to any infrastructure that can run Node.js. Prior to versions 8.6.56 and 9.6.0-alpha.45, 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 issue has been patched in versions 8.6.56 and 9.6.0-alpha.45. The advisory is shared at github.com. This vulnerability is known as CVE-2026-33508 since 03/20/2026. The exploitation appears to be easy. The attack can be launched remotely. The exploitation doesn't need any form of authentication. Neither technical details nor an exploit are publicly available. MITRE ATT&CK project uses the attack technique T1499 for this issue. Upgrading to version 8.6.56 or 9.6.0-alpha.45 eliminates this vulnerability. Applying the patch 060d27053fb0fadf613c25aabab7fe0c82b7a899 is able to eliminate this problem. The bugfix is ready for download at github.com. The best possible mitigation is suggested to be upgrading to the latest version. Productinfo Vendor parse-community Name parse-server Version 8.6.0 8.6.1 8.6.2 8.6.3 8.6.4 8.6.5 8.6.6 8.6.7 8.6.8 8.6.9 8.6.10 8.6.11 8.6.12 8.6.13 8.6.14 8.6.15 8.6.16 8.6.17 8.6.18 8.6.19 8.6.20 8.6.21 8.6.22 8.6.23 8.6.24 8.6.25 8.6.26 8.6.27 8.6.28 8.6.29 8.6.30 8.6.31 8.6.32 8.6.33 8.6.34 8.6.35 8.6.36 8.6.37 8.6.38 8.6.39 8.6.40 8.6.41 8.6.42 8.6.43 8.6.44 8.6.45 8.6.46 8.6.47 8.6.48 8.6.49 8.6.50 8.6.51 8.6.52 8.6.53 8.6.54 8.6.55 9.6.0-alpha.0 9.6.0-alpha.1 9.6.0-alpha.2 9.6.0-alpha.3 9.6.0-alpha.4 9.6.0-alpha.5 9.6.0-alpha.6 9.6.0-alpha.7 9.6.0-alpha.8 9.6.0-alpha.9 9.6.0-alpha.10 9.6.0-alpha.11 9.6.0-alpha.12 9.6.0-alpha.13 9.6.0-alpha.14 9.6.0-alpha.15 9.6.0-alpha.16 9.6.0-alpha.17 9.6.0-alpha.18 9.6.0-alpha.19 9.6.0-alpha.20 9.6.0-alpha.21 9.6.0-alpha.22 9.6.0-alpha.23 9.6.0-alpha.24 9.6.0-alpha.25 9.6.0-alpha.26 9.6.0-alpha.27 9.6.0-alpha.28 9.6.0-alpha.29 9.6.0-alpha.30 9.6.0-alpha.31 9.6.0-alpha.32 9.6.0-alpha.33 9.6.0-alpha.34 9.6.0-alpha.35 9.6.0-alpha.36 9.6.0-alpha.37 9.6.0-alpha.38 9.6.0-alpha.39 9.6.0-alpha.40 9.6.0-alpha.41 9.6.0-alpha.42 9.6.0-alpha.43 9.6.0-alpha.44 License open-source Website Product: https://github.com/parse-community/parse-server/ CPE 2.3info 🔒 🔒 🔒 CPE 2.2info 🔒 🔒 🔒 CVSSv4info VulDB Vector: 🔒 VulDB Reliability: 🔍 CNA CVSS-B Score: 🔒 CNA CVSS-BT Score: 🔒 CNA Vector: 🔒 CVSSv3info VulDB Meta Base Score: 5.3 VulDB Meta Temp Score: 5.1 VulDB Base Score: 5.3 VulDB Temp Score: 5.1 VulDB Vector: 🔒 VulDB Reliability: 🔍 CVSSv2info Vector Complexity Authentication Confidentiality Integrity Availability Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock VulDB Base Score: 🔒 VulDB Temp Score: 🔒 VulDB Reliability: 🔍 Exploitinginfo Class: Recursion CWE: CWE-674 / CWE-404 CAPEC: 🔒 ATT&CK: 🔒 Physical: No Local: No Remote: Yes Availability: 🔒 Status: Not defined Price Prediction: 🔍 Current Price Estimation: 🔒 0-Day Unlock Unlock Unlock Unlock Today Unlock Unlock Unlock Unlock Threat Intelligenceinfo Interest: 🔍 Active Actors: 🔍 Active APT Groups: 🔍 Countermeasuresinfo Recommended: Upgrade Status: 🔍 0-Day Time: 🔒 Upgrade: parse-server 8.6.56/9.6.0-alpha.45 Patch: 060d27053fb0fadf613c25aabab7fe0c82b7a899 Timelineinfo 03/20/2026 CVE reserved 03/24/2026 +4 days Advisory disclosed 03/24/2026 +0 days VulDB entry created 03/24/2026 +0 days VulDB entry last update Sourcesinfo Product: github.com Advisory: GHSA-6qh5-m6g3-xhq6 Status: Confirmed CVE: CVE-2026-33508 (🔒) GCVE (CVE): GCVE-0-2026-33508 GCVE (VulDB): GCVE-100-352837 Entryinfo Created: 03/24/2026 20:47 Changes: 03/24/2026 20:47 (69) Complete: 🔍 Cache ID: 99:DC5:101 Discussion No comments yet. 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