VulnerabilityAnalyzed

CVE-2026-32770

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.

HIGH 7.5EPSS 0.55%

Does this matter?

High impact if exploited, but EPSS currently rates exploitation as unlikely (0.55%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.

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.

CVSS 3.1: 7.5 HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
EPSS: 0.55% probability · 44th percentile
CISA KEV: Not listed
Weakness: CWE-248
Affected: parseplatform/parse-server
Source: security-advisories@github.com

References

https://github.com/parse-community/parse-server/pull/10197Issue Tracking
https://github.com/parse-community/parse-server/pull/10199Issue Tracking
https://github.com/parse-community/parse-server/security/advisories/GHSA-827p-g5x5-h86cVendor Advisory

Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.