Cyber Resilience

CVE-2026-30972

Parseplatform Parse-Server ≤ 8.6.23

Published
10 March 2026
Modified
11 March 2026
Patch / advisory
View advisory
CVSS Score v4 6.9
Click a component to see what it means
Raw vectorCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:N/SC:N/SI:N/SA:L/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 0.0034 27th percentile
Risk Priority 41 floored blend · peak EPSS

Summary

CVE-2026-30972 is a medium-severity Improper Control of Interaction Frequency (CWE-799) vulnerability in Parseplatform Parse-Server. Its CVSS base score is 6.9 (Medium).

Operationally, exploitation aligns with the MITRE ATT&CK technique Brute Force (T1110); ranked at the 27th 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-10 (Concurrent Session Control) and AC-7 (Unsuccessful Logon Attempts) — see the control section below for these in your framework.

Deeper analysis AI-assisted summary

Synthesised by an AI model from the NVD description and linked references — a reading aid, not an authoritative source.

CVE-2026-30972 is a rate limiting bypass vulnerability in Parse Server, an open source backend deployable on any Node.js infrastructure. In versions prior to 9.5.2-alpha.10 and 8.6.23, the rate limiting middleware operates at the Express middleware layer, but the /batch endpoint processes sub-requests internally through the Promise router. This routing bypasses Express middleware, including rate limiting, allowing attackers to bundle multiple requests targeting a rate-limited endpoint into a single batch request. Deployments relying on Parse Server's built-in rate limiting feature are affected, with a CVSS v3.1 base score of 7.5 (AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H) and mapped to CWE-799 (Resource Management Errors).

Unauthenticated remote attackers can exploit this vulnerability by crafting a batch request that encapsulates numerous sub-requests to rate-limited endpoints, effectively circumventing configured rate limits. This enables excessive request volumes in a single HTTP call, potentially overwhelming server resources and causing denial of service through resource exhaustion, as indicated by the high availability impact in the CVSS score.

The Parse community addressed this in releases 8.6.23 and 9.5.2-alpha.10, with details available in the GitHub security advisory GHSA-775h-3xrc-c228 and corresponding release notes. Security practitioners should upgrade to these fixed versions and review configurations relying on built-in rate limiting, considering additional server-level protections like external rate limiters.

OWASP Top 10 for Web (2025)

A06:2025 Insecure Design

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 o 9.5.2-alpha.10 and 8.6.23, Parse Server's rate limiting middleware is applied at the Express middleware layer, but the batch request endpoint…

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(/batch) processes sub-requests internally by routing them directly through the Promise router, bypassing Express middleware including rate limiting. An attacker can bundle multiple requests targeting a rate-limited endpoint into a single batch request to circumvent the configured rate limit. Any Parse Server deployment that relies on the built-in rate limiting feature is affected. This vulnerability is fixed in 9.5.2-alpha.10 and 8.6.23.

CWE(s)
CWE-799

Related Threats

MITRE ATT&CK Enterprise Techniques

T1110 Brute Force Credential Access
Adversaries may use brute force techniques to gain access to accounts when passwords are unknown or when password hashes are obtained.
attack.mitre.org →
T1499.002 Service Exhaustion Flood Impact
Adversaries may target the different network services provided by systems to conduct a denial of service (DoS).
attack.mitre.org →
T1499.003 Application Exhaustion Flood Impact
Adversaries may target resource intensive features of applications to cause a denial of service (DoS), denying availability to those applications.
attack.mitre.org →
T1667 Email Bombing Impact
Adversaries may flood targeted email addresses with an overwhelming volume of messages.
attack.mitre.org →
T1110.001 Password Guessing Credential Access
Adversaries with no prior knowledge of legitimate credentials within the system or environment may guess passwords to attempt access to accounts.
attack.mitre.org →
T1110.003 Password Spraying Credential Access
Adversaries may use a single or small list of commonly used passwords against many different accounts to attempt to acquire valid account credentials.
attack.mitre.org →
Derived from this CVE’s CWE(s) via the direct CWE→ATT&CK cross-walk.

CVEs Like This One

CVE-2026-33538Same product: Parseplatform Parse-Server
CVE-2026-30946Same product: Parseplatform Parse-Server
CVE-2026-33323Same product: Parseplatform Parse-Server
CVE-2026-31901Same product: Parseplatform Parse-Server
CVE-2026-34573Same product: Parseplatform Parse-Server
CVE-2026-30925Same product: Parseplatform Parse-Server
CVE-2026-39321Same product: Parseplatform Parse-Server
CVE-2026-33508Same product: Parseplatform Parse-Server
CVE-2026-33498Same product: Parseplatform Parse-Server
CVE-2026-32944Same product: Parseplatform Parse-Server

Affected Assets

parseplatform
parse-server
9.5.2 · ≤ 8.6.23 · 9.0.0 — 9.5.2

Mitigating Controls

Mitigating Controls (NIST 800-53 r5) AI

AC-10 Concurrent Session Control good match

ac-10 enforces a hard limit on concurrent sessions per user, directly stopping uncontrolled interaction frequency at the session level.

AC-7 Unsuccessful Logon Attempts good match

ac-7 directly enforces a limit on the frequency of invalid authentication attempts, structurally preventing the weakness for that interaction class.

SC-5 Denial-of-service Protection partial match

sc-5 reduces the impact of excessive request volume (DoS) but does not itself impose the frequency controls whose absence defines the weakness.

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.IR-01 partial match
prevents

Protecting networks from unauthorized usage can incorporate rate limiting to bound interaction frequency.

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.8.20 Networks security partial match
mitigates

Network security controls can enforce rate limiting and throttling at the perimeter.

A.8.26 Application security requirements partial match
prevents

Application security requirements explicitly include controls on interaction frequency and throttling.

A.8.27 Secure system architecture and engineering principles partial match
prevents

Secure architecture principles recommend rate-limiting and resource-management mechanisms.

A.8.28 Secure coding partial match
prevents

Secure coding practices can embed input-frequency and throttling checks in code.

A.8.6 Capacity management partial match
degrades

Capacity management directly limits request rates and resource exhaustion that CWE-799 describes.

References