GHSA-827p-g5x5-h86c
Parse Server LiveQuery subscription with invalid regular expression crashes server
At a glance
- Published
- Updated
- CVE
- CVE-2026-32770
- Aliases
- BIT-parse-2026-32770
- CVSS_V3
- CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
Description
### Impact 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. ### Patches The fix 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. ### Workarounds Disable LiveQuery if it is not needed.
Affected packages
| Package | Versions |
|---|---|
| npm · parse-server | introduced 9.0.0, fixed 9.6.0-alpha.19 |
| npm · parse-server | introduced 0, fixed 8.6.43 |
References
- https://github.com/parse-community/parse-server/security/advisories/GHSA-827p-g5x5-h86c WEB
- https://nvd.nist.gov/vuln/detail/CVE-2026-32770 ADVISORY
- https://github.com/parse-community/parse-server/pull/10197 WEB
- https://github.com/parse-community/parse-server/pull/10199 WEB
- https://github.com/parse-community/parse-server PACKAGE
Sources
| Source | Licence |
|---|---|
| OSV.dev | CC-BY 4.0 — GitHub Advisory Database |