PT-2026-27483 · Unknown · Parse Server

Mtrezza · Published 2026-03-24 · Updated 2026-03-27 · CVE-2026-33538

Positive Technologies (AI Summary)

CVSS v4.0

8.7

High

Base vector

AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N

Name of the Vulnerable Software and Affected Versions Parse Server versions prior to 8.6.58 Parse Server versions prior to 9.6.0-alpha.52

Description An unauthenticated attacker can cause a denial of service by sending authentication requests with arbitrary, unconfigured provider names. The server executes a database query for each unconfigured provider before rejecting the request. Because no database index exists for unconfigured providers, each request triggers a full collection scan on the user database, which can be parallelized to saturate database resources.

Recommendations Upgrade to Parse Server version 8.6.58 or later. Upgrade to Parse Server version 9.6.0-alpha.52 or later.

Exploit

Fix

Resource Exhaustion

Weakness Enumeration

CWE-400

Related Identifiers

BIT-PARSE-2026-33538

CVE-2026-33538

GHSA-G4CF-XJ29-WQQR

Affected Products

Parse Server

References · 11

• 🔥 https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/33xxx/CVE-2026-33538.json · Exploit
• https://github.com/parse-community/parse-server/commit/fbac847499e57f243315c5fc7135be1d58bb8e54 · Patch
• https://github.com/parse-community/parse-server/security/advisories/GHSA-g4cf-xj29-wqqr · Vendor Advisory
• https://github.com/parse-community/parse-server/commit/40eb442e02672986730007d0a1edb22c1c4bd357 · Patch
• https://nvd.nist.gov/vuln/detail/CVE-2026-33538 · Security Note
• https://osv.dev/vulnerability/CVE-2026-33538 · Vendor Advisory
• https://osv.dev/vulnerability/GHSA-g4cf-xj29-wqqr · Vendor Advisory
• https://osv.dev/vulnerability/BIT-parse-2026-33538 · Vendor Advisory
• https://github.com/parse-community/parse-server/pull/10270 · Note
• https://github.com/parse-community/parse-server/pull/10271 · Note
• https://github.com/parse-community/parse-server · Note