CVE-2026-32770— Parse Server: LiveQuery subscription with invalid regular expression crashes server
Possible ATT&CK Techniques 1AI
T1499 · Endpoint Denial of ServiceGet alerts for future matching vulnerabilitiesLog in to subscribe
I. Basic Information for CVE-2026-32770
Vulnerability Information
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Vulnerability Title
Parse Server: LiveQuery subscription with invalid regular expression crashes server
Source: NVD (National Vulnerability Database)
Vulnerability Description
Parse Server is an open source backend that can be deployed to any infrastructure that can run Node.js. Prior to 9.6.0-alpha.19 and 8.6.43, a remote attacker can crash the Parse Server by subscribing to a LiveQuery with an invalid regular expression pattern. The server process terminates when the invalid pattern reaches the regex engine during subscription matching, causing denial of service for all connected clients. The fix in 9.6.0-alpha.19 and 8.6.43 validates regular expression patterns at subscription time, rejecting invalid patterns before they are stored. Additionally, a defense-in-depth try-catch prevents any subscription matching error from crashing the server process. As a workaround, disable LiveQuery if it is not needed.
Source: NVD (National Vulnerability Database)
CVSS Information
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
Source: NVD (National Vulnerability Database)
Vulnerability Type
未捕获的异常
Source: NVD (National Vulnerability Database)
Vulnerability Title
Parse Server 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Parse Server是Parse Platform开源的一个开源后端，可以部署到任何可以运行 Node.js 的基础设施。 Parse Server 9.6.0-alpha.19之前版本和8.6.43之前版本存在安全漏洞，该漏洞源于无效正则表达式模式可导致服务器崩溃，可能导致拒绝服务。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)
Affected Products
| Vendor | Product | Affected Versions | CPE | Subscribe |
|---|---|---|---|---|
| parse-community | parse-server | >= 9.0.0, < 9.6.0-alpha.19 | - |
II. Public POCs for CVE-2026-32770
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|---|
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Patches & Fixes for CVE-2026-32770 (2)
Vendor Advisories for CVE-2026-32770 (1)
Same Patch Batch · parse-community · 2026-03-18 · 9 CVEs total
| CVE-2026-32742 | 4.3 MEDIUM | Parse Server session creation endpoint allows overwriting server-generated session fields |
| CVE-2026-32886 | Parse Server's Cloud function dispatch crashes server via prototype chain traversal | |
| CVE-2026-32728 | Parse Server has a stored XSS filter bypass via Content-Type MIME parameter and missing XM | |
| CVE-2026-32878 | Parse Server vulnerable to schema poisoning via prototype pollution in deep copy | |
| CVE-2026-32944 | Parse Server crash via deeply nested query condition operators | |
| CVE-2026-32943 | Parse Server has a password reset token single-use bypass via concurrent requests | |
| CVE-2026-33042 | Parse Server affected by empty authData bypassing credential requirement on signup | |
| CVE-2026-33163 | Parse Server leaks protected fields via LiveQuery afterEvent trigger |
IV. Related Vulnerabilities
Same product: parse-server
- CVE-2026-43930
Parse Server: MFA SMS one-time password accepted twice under - CVE-2026-39381
Parse Server's Endpoint `/sessions/me` bypasses `_Session` ` - CVE-2026-39321
Parse Server has a login timing side-channel reveals user ex - CVE-2026-35200
Parse Server has a file upload Content-Type override via ext - CVE-2026-34784
Parse Server: Streaming file download bypasses afterFind fil
Same vendor: parse-community
- CVE-2026-43930
Parse Server: MFA SMS one-time password accepted twice under - CVE-2026-39381
Parse Server's Endpoint `/sessions/me` bypasses `_Session` ` - CVE-2026-39321
Parse Server has a login timing side-channel reveals user ex - CVE-2026-35200
Parse Server has a file upload Content-Type override via ext - CVE-2026-34784
Parse Server: Streaming file download bypasses afterFind fil
Same weakness: CWE-248
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IO::Uncompress::Unzip versions before 2.215 for Perl propaga - CVE-2026-44905
Vanetza: Remote Denial of Service via Uncaught OER Encoding - CVE-2026-43988
Vanetza: Remote Denial of Service via Uncaught Exception in - CVE-2026-44001
vm2: Sandbox Escape via Promise Constructor Unhandled Reject - CVE-2026-42545
Granian: DoS via WSGI response header panic
V. Comments for CVE-2026-32770
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