Which versions of Quickjs are affected by CVE-2025-12745?

Organizations using QuickJS should be aware of moderate risk from CVE-2025-12745, a buffer overflow vulnerability rated CVSS 4.8. Exploitation could cause memory corruption or application crashes.. A patch is available.

Is there a public PoC exploit available for CVE-2025-12745?

Yes, a public proof-of-concept exploit is available for CVE-2025-12745. Prioritise patching immediately. EPSS: 0.0%.

How to fix or mitigate CVE-2025-12745?

During next maintenance window: Identify affected systems running QuickJS and apply vendor patches when convenient. Vendor patch is available.

Quickjs CVE-2025-12745

Q: What is the CVSS score of CVE-2025-12745?

CVE-2025-12745 has a CVSS 4.0 base score of 1.9 (Low). CVSS vector: CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P/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 exploitation probability: 0.0%.

LOW

Buffer Overflow (CWE-119)

2025-11-05 cna@vuldb.com

Buffer Overflow Quickjs Bellard

1.9

CVSS 4.0 · NVD

Severity by source

NVD PRIMARY

1.9 LOW

CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P/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

Primary rating from NVD · only source for this CVE.

CVSS VectorNVD

Attack Vector

Local

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Lifecycle Timeline

Severity Changed

Apr 29, 2026 - 01:11 NVD

MEDIUM LOW

CVSS changed

Apr 29, 2026 - 01:11 NVD

4.8 (MEDIUM) 1.9 (LOW)

Analysis Generated

Mar 28, 2026 - 19:20 vuln.today

Patch released

Mar 28, 2026 - 19:20 nvd

Patch available

PoC Detected

Jan 08, 2026 - 21:50 vuln.today

Public exploit code

CVE Published

Nov 05, 2025 - 19:15 nvd

MEDIUM 4.8

DescriptionCVE.org

A weakness has been identified in QuickJS up to eb2c89087def1829ed99630cb14b549d7a98408c. This affects the function js_array_buffer_slice of the file quickjs.c. This manipulation causes buffer over-read. The attack is restricted to local execution. The exploit has been made available to the public and could be exploited. This product adopts a rolling release strategy to maintain continuous delivery Patch name: c6fe5a98fd3ef3b7064e6e0145dfebfe12449fea. To fix this issue, it is recommended to deploy a patch.

AnalysisAI

A weakness has been identified in QuickJS up to eb2c89087def1829ed99630cb14b549d7a98408c. Rated medium severity (CVSS 4.8), this vulnerability is low attack complexity. Public exploit code available.

Technical ContextAI

This vulnerability is classified as Buffer Overflow (CWE-119), which allows attackers to corrupt memory to execute arbitrary code or crash the application. A weakness has been identified in QuickJS up to eb2c89087def1829ed99630cb14b549d7a98408c. This affects the function js_array_buffer_slice of the file quickjs.c. This manipulation causes buffer over-read. The attack is restricted to local execution. The exploit has been made available to the public and could be exploited. This product adopts a rolling release strategy to maintain continuous delivery Patch name: c6fe5a98fd3ef3b7064e6e0145dfebfe12449fea. To fix this issue, it is recommended to deploy a patch. Affected products include: Bellard Quickjs.

RemediationAI

A vendor patch is available. Apply the latest security update as soon as possible. Use memory-safe languages or bounds-checking. Enable ASLR, DEP/NX, stack canaries. Use safe string functions.