bellard mquickjs JS_Call out-of-bounds

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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4.1$0-$5k0.00+

Summaryinfo

A vulnerability described as problematic has been identified in bellard mquickjs. Affected by this issue is the function JS_Call. The manipulation results in out-of-bounds. This vulnerability is identified as CVE-2025-71470. The attack is only possible with local access. There is not any exploit available. It is best practice to apply a patch to resolve this issue.

Detailsinfo

A vulnerability classified as problematic has been found in bellard mquickjs (unknown version). Affected is the function JS_Call. The manipulation with an unknown input leads to a out-of-bounds vulnerability. CWE is classifying the issue as CWE-125. The product reads data past the end, or before the beginning, of the intended buffer. This is going to have an impact on availability. CVE summarizes:

MicroQuickJS (mquickjs) before commit 99eed3f contains an out-of-bounds read vulnerability because JS_Call() raises exceptions during frame setup without updating ctx->sp and ctx->fp. Attackers can supply JavaScript that calls a non-function value, causing build_backtrace() to walk stale frame pointers and crash the engine for denial of service.

The advisory is available at github.com. This vulnerability is traded as CVE-2025-71470 since 11/15/2026. The exploitability is told to be easy. Local access is required to approach this attack. Successful exploitation requires user interaction by the victim. Technical details are known, but there is no available exploit.

Applying the patch 99eed3f94cb66ea7e02fd3472ca7374dee31bb89 is able to eliminate this problem.

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Productinfo

Vendor

Name

Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CNA CVSS-B Score: 🔒
CNA CVSS-BT Score: 🔒
CNA Vector: 🔒

CVSSv3info

VulDB Meta Base Score: 4.1
VulDB Meta Temp Score: 4.1

VulDB Base Score: 2.8
VulDB Temp Score: 2.7
VulDB Vector: 🔒
VulDB Reliability: 🔍

CNA Base Score: 5.5
CNA Vector (VulnCheck): 🔒

CVSSv2info

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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Out-of-bounds
CWE: CWE-125 / CWE-119
CAPEC: 🔒
ATT&CK: 🔒

Physical: Partially
Local: Yes
Remote: Partially

Availability: 🔒
Status: Not defined
Price Prediction: 🔍
Current Price Estimation: 🔒

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Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Patch
Status: 🔍

0-Day Time: 🔒

Patch: 99eed3f94cb66ea7e02fd3472ca7374dee31bb89

Timelineinfo

11/15/2026 Advisory disclosed
11/15/2026 +0 days CVE reserved
11/15/2026 +0 days VulDB entry created
11/15/2026 +0 days VulDB entry last update

Sourcesinfo

Product: github.com

Advisory: github.com
Status: Confirmed

CNA: VulnCheck
CVE: CVE-2025-71470 (🔒)

GCVE (CVE): GCVE-0-2025-71470
GCVE (VulDB): GCVE-100-437526

Entryinfo

Created: 11/15/2026 17:19
Changes: 11/15/2026 17:19 (75)
Complete: 🔍
Cache ID: 216::103

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