What is the CVSS score of CVE-2025-46687?

CVE-2025-46687 has a CVSS 3.1 base score of 5.6 (Medium). CVSS vector: CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:C/C:L/I:L/A:L. EPSS exploitation probability: 0.1%.

Which versions of Quickjs are affected by CVE-2025-46687?

Organizations using quickjs-ng through 0.9.0 should be aware of moderate risk from CVE-2025-46687 rated CVSS 5.6. Exploitation could compromise the security of affected deployments.. A patch is available.

Is there a public PoC exploit available for CVE-2025-46687?

Yes, a public proof-of-concept exploit is available for CVE-2025-46687. Prioritise patching immediately. EPSS: 0.1%.

How to fix or mitigate CVE-2025-46687?

Within 30 days: Identify affected systems and apply vendor patches as part of regular patch cycle. Vendor patch is available.

Quickjs CVE-2025-46687

MEDIUM

Allocation of Resources Without Limits or Throttling (CWE-770)

2025-04-27 cve@mitre.org

Buffer Overflow Denial Of Service Quickjs Quickjs Ng Bellard

5.6

CVSS 3.1 · NVD

Severity by source

NVD PRIMARY

5.6 MEDIUM

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

Primary rating from NVD · only source for this CVE.

CVSS VectorNVD

Attack Vector

Local

Attack Complexity

High

Privileges Required

None

User Interaction

None

Scope

Changed

Confidentiality

Low

Integrity

Low

Availability

Low

Lifecycle Timeline

Analysis Generated

Mar 28, 2026 - 18:38 vuln.today

Patch released

Mar 28, 2026 - 18:38 nvd

Patch available

PoC Detected

Jan 14, 2026 - 17:30 vuln.today

Public exploit code

CVE Published

Apr 27, 2025 - 20:15 nvd

MEDIUM 5.6

DescriptionCVE.org

quickjs-ng through 0.9.0 has a missing length check in JS_ReadString for a string, leading to a heap-based buffer overflow. QuickJS before 2025-04-26 is also affected.

AnalysisAI

quickjs-ng through 0.9.0 has a missing length check in JS_ReadString for a string, leading to a heap-based buffer overflow. Rated medium severity (CVSS 5.6), this vulnerability is no authentication required. Public exploit code available.

Technical ContextAI

This vulnerability is classified as Allocation of Resources Without Limits (CWE-770), which allows attackers to exhaust system resources through uncontrolled allocation. quickjs-ng through 0.9.0 has a missing length check in JS_ReadString for a string, leading to a heap-based buffer overflow. QuickJS before 2025-04-26 is also affected. Affected products include: Bellard Quickjs, Quickjs-Ng Quickjs. Version information: through 0.9.0.

RemediationAI

A vendor patch is available. Apply the latest security update as soon as possible. Set resource limits, implement rate limiting, validate input sizes.