Cyber Resilience

CVE-2026-34224

Race Condition in Parseplatform Parse-Server ≤ 8.6.64

Race Condition
Published
31 March 2026
Modified
24 July 2026
Patch / advisory
View advisory
CVSS Score v4 2.1
Click a component to see what it means
Raw vectorCVSS:4.0/AV:N/AC:H/AT:N/PR:H/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
EPSS Score 0.0031 24th percentile
Risk Priority 15 floored blend · peak EPSS

Summary

CVE-2026-34224 is a low-severity Time-of-check Time-of-use (TOCTOU) Race Condition (CWE-367) vulnerability in Parseplatform Parse-Server. Its CVSS base score is 2.1 (Low).

Operationally, exploitation aligns with the MITRE ATT&CK technique Multi-Factor Authentication (T1556.006); ranked at the 24th percentile by exploit likelihood (below the median); it is not currently listed in the CISA KEV catalog.

The strongest mitigations our analysis identified map to AC-3 (Access Enforcement) and IA-5 (Authenticator Management) — see the control section below for these in your framework.

EU & UK References

Vulnerability Data

Parse Server is an open source backend that can be deployed to any infrastructure that can run Node.js. Prior to versions 8.6.64 and 9.7.0-alpha.8, an attacker who possesses a valid authentication provider token and a single MFA recovery code or…

more

SMS one-time password can create multiple authenticated sessions by sending concurrent login requests via the authData login endpoint. This defeats the single-use guarantee of MFA recovery codes and SMS one-time passwords, allowing session persistence even after the legitimate user revokes detected sessions. This issue has been patched in versions 8.6.64 and 9.7.0-alpha.8.

CWE(s)
CWE-367

Related Threats

MITRE ATT&CK Enterprise TechniquesAI

T1556.006 Multi-Factor Authentication Defense Impairment
Adversaries may disable or modify multi-factor authentication (MFA) mechanisms to enable persistent access to compromised accounts.
attack.mitre.org →
T1078 Valid Accounts Stealth
Adversaries may obtain and abuse credentials of existing accounts as a means of gaining Initial Access, Persistence, Privilege Escalation, or Defense Evasion.
attack.mitre.org →
Why these techniques?

Race condition defeats single-use MFA recovery/OTP, enabling unauthorized multi-session access and persistence with valid accounts.

Confidence: MEDIUM · MITRE ATT&CK Enterprise v19.0

CVEs Like This One

CVE-2026-33624Same product: Parseplatform Parse-Server
CVE-2026-32943Same product: Parseplatform Parse-Server
CVE-2026-31875Same product: Parseplatform Parse-Server
CVE-2026-34574Same product: Parseplatform Parse-Server
CVE-2026-27804Same product: Parseplatform Parse-Server
CVE-2026-33409Same product: Parseplatform Parse-Server
CVE-2026-32248Same product: Parseplatform Parse-Server
CVE-2026-32242Same product: Parseplatform Parse-Server
CVE-2026-30949Same product: Parseplatform Parse-Server
CVE-2026-30229Same product: Parseplatform Parse-Server

Affected Assets

parseplatform
parse-server
9.7.0 · ≤ 8.6.64 · 9.0.0 — 9.7.0

Mitigating Controls

Control response

Prevent
Stop it (NIST 800-53)
  • AC-3 Access Enforcement
  • IA-5 Authenticator Management
  • SC-23 Session Authenticity
Detect
Catch it (NIST detect / respond)

—

Harden
Shrink the surface (DISA STIG)

—

Validate
Prove the fix (OWASP ASVS)
  • V15.4.2
  • V17.2.6

Mitigating Controls (NIST 800-53 r5) AI

AC-3 Access Enforcement good match
prevent

Directly enforces atomic single-use semantics on MFA recovery codes/SMS OTPs during concurrent authData login requests, preventing the TOCTOU race that allows multiple sessions.

IA-5 Authenticator Management good match
prevent

Requires proper management of one-time authenticators so that recovery codes and SMS OTPs are invalidated immediately upon first use, eliminating the window exploited by concurrent requests.

SC-23 Session Authenticity partial match
prevent

Ensures session tokens issued from MFA-protected logins cannot be duplicated or replayed across concurrent requests, limiting persistence after the legitimate user revokes sessions.

Mitigating Controls (NIST CSF 2.0) AI

Derived directly from the weakness types (CWEs) cited in the NVD entry via our AI-authored CWE→CSF cross-walk (authority under review) — links open the control.

PR.PS-06 mostly match
prevents

Secure SDLC practices directly include coding standards and reviews that prevent TOCTOU race conditions.

Mitigating Controls (ISO/IEC 27001:2022 Annex A) AI

Derived directly from the weakness types (CWEs) cited in the NVD entry via our AI-authored CWE→ISO cross-walk (authority under review) — links open the control.

A.8.17 Clock synchronization none match
none

Reliable, synchronized time across systems narrows the exploitable window in which a resource state can change between a security check and its use.

References