PT-2026-27485 · Unknown · Parse Server

Spbavarva · Published 2026-03-24 · Updated 2026-03-27 · CVE-2026-33624

Positive Technologies (AI Summary)

CVSS v3.1

2.7

Low

Base vector

AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:L/A:N

Name of the Vulnerable Software and Affected Versions Parse Server versions prior to 8.6.60 Parse Server versions prior to 9.6.0-alpha.54

Description An attacker with a user's password and a valid multi-factor authentication (MFA) recovery code can reuse the recovery code an unlimited number of times by sending concurrent login requests. This circumvents the intended single-use functionality of recovery codes. The attack requires the user's password, a valid recovery code, and the ability to send requests rapidly. The issue stems from a lack of proper handling of single-use tokens during login attempts. The login handler did not employ optimistic locking when updating authentication data containing consumed single-use tokens, allowing concurrent requests to bypass the single-use restriction.

Recommendations Update to Parse Server version 8.6.60 or later. Update to Parse Server version 9.6.0-alpha.54 or later.

Exploit

Fix

Time Of Check To Time Of Use

Weakness Enumeration

CWE-367

Related Identifiers

BIT-PARSE-2026-33624

CVE-2026-33624

GHSA-2299-GHJR-6VJP

Affected Products

Parse Server

References · 12

• 🔥 https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/33xxx/CVE-2026-33624.json · Exploit
• https://github.com/parse-community/parse-server/commit/5e70094250a36bfcc14ecd49592be2b94fba66ff · Patch
• https://github.com/parse-community/parse-server/security/advisories/GHSA-2299-ghjr-6vjp · Vendor Advisory
• https://github.com/parse-community/parse-server/commit/fc3da35a81d5083b453e8967cabcc880f1a3bd0c · Patch
• https://nvd.nist.gov/vuln/detail/CVE-2026-33624 · Security Note
• https://osv.dev/vulnerability/BIT-parse-2026-33624 · Vendor Advisory
• https://osv.dev/vulnerability/GHSA-2299-ghjr-6vjp · Vendor Advisory
• https://osv.dev/vulnerability/CVE-2026-33624 · Vendor Advisory
• https://github.com/parse-community/parse-server/pull/10276 · Note
• https://github.com/parse-community/parse-server/pull/10275 · Note
• https://github.com/parse-community/parse-server · Note
• https://reddit.com/r/VulnMatter/comments/1s39maw/resumen_diario_de_vulnerabilidades_25032026 · Reddit Post