CVE-2026-47138

CVE-2026-47138 : Parse Server suffers pre-authentication DoS via adversarial client version header input causing polynomial backtracking in the request-header parser. Affected before fixes in versions up to 8.6.76/9.9.0-alpha.1; patched in 8.6.77 and 9.9.1-alpha.1. An unauthenticated attacker wit...

CVE-2026-47138 Parse Server: Pre-authentication denial of service via client version header regex backtracking

Parse Server is an open source backend that can be deployed to any infrastructure that can run Node.js. Prior to versions 8.6.77 and 9.9.1-alpha.1, an unauthenticated attacker who knows a publicly-known Parse Application ID can submit a single HTTP request whose client SDK version field contains...

GHSA-38M6-82C8-4XFM Parse Server: Pre-authentication denial of service via client version header regex backtracking

Impact An unauthenticated attacker who knows a publicly-known Parse Application ID can submit a single HTTP request whose client SDK version field contains adversarial input that triggers polynomial backtracking in a request-header parser. The parsing runs before session authentication and before...

Parse Server: Pre-authentication denial of service via client version header regex backtracking

Impact An unauthenticated attacker who knows a publicly-known Parse Application ID can submit a single HTTP request whose client SDK version field contains adversarial input that triggers polynomial backtracking in a request-header parser. The parsing runs before session authentication and before...

PT-2026-42860

Name of the Vulnerable Software and Affected Versions Parse Server affected versions not specified Description An unauthenticated attacker with knowledge of a public Parse Application ID can cause a denial of service by submitting a single HTTP request to any '/parse/' endpoint. The attack involv...

Regular Expression Denial of Service (ReDoS)

Overview parse-server is a version of the Parse backend that can be deployed to any infrastructure that can run Node.js. Affected versions of this package are vulnerable to Regular Expression Denial of Service ReDoS via the clientSDK parameter in the request-header parser. An attacker can exhaust...