CVE-2025-46687
QuickJS Heap Buffer Overflow
Description
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.
INFO
Published Date :
April 27, 2025, 8:15 p.m.
Last Modified :
Jan. 14, 2026, 5:30 p.m.
Remotely Exploit :
No
Source :
[email protected]
Affected Products
The following products are affected by CVE-2025-46687
vulnerability.
Even if cvefeed.io is aware of the exact versions of the
products
that
are
affected, the information is not represented in the table below.
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS 3.1 | MEDIUM | [email protected] | ||||
| CVSS 3.1 | HIGH | [email protected] |
Solution
- Update quickjs-ng to a patched version.
- Ensure the string length check is implemented.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2025-46687.
| URL | Resource |
|---|---|
| https://bellard.org/quickjs/Changelog | Release Notes |
| https://github.com/bellard/quickjs/commit/1eb05e44fad89daafa8ee3eb74b8520b4a37ec9a | Patch |
| https://github.com/bellard/quickjs/issues/399 | Exploit Issue Tracking Vendor Advisory |
| https://github.com/quickjs-ng/quickjs/commit/28fa43d3ddff2c1ba91b6e3a788b2d7ba82d1465 | Patch |
| https://github.com/quickjs-ng/quickjs/issues/1018 | Exploit Issue Tracking Vendor Advisory |
| https://github.com/quickjs-ng/quickjs/pull/1020 | Issue Tracking Patch |
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2025-46687 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2025-46687
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2025-46687 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2025-46687 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
Initial Analysis by [email protected]
Jan. 14, 2026
Action Type Old Value New Value Added CVSS V3.1 AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H Added CPE Configuration OR *cpe:2.3:a:quickjs-ng:quickjs:*:*:*:*:*:*:*:* versions up to (including) 0.9.0 *cpe:2.3:a:bellard:quickjs:*:*:*:*:*:*:*:* versions up to (excluding) 2025-04-26 Added Reference Type MITRE: https://bellard.org/quickjs/Changelog Types: Release Notes Added Reference Type MITRE: https://github.com/bellard/quickjs/commit/1eb05e44fad89daafa8ee3eb74b8520b4a37ec9a Types: Patch Added Reference Type MITRE: https://github.com/bellard/quickjs/issues/399 Types: Exploit, Issue Tracking, Vendor Advisory Added Reference Type MITRE: https://github.com/quickjs-ng/quickjs/commit/28fa43d3ddff2c1ba91b6e3a788b2d7ba82d1465 Types: Patch Added Reference Type MITRE: https://github.com/quickjs-ng/quickjs/issues/1018 Types: Exploit, Issue Tracking, Vendor Advisory Added Reference Type MITRE: https://github.com/quickjs-ng/quickjs/pull/1020 Types: Issue Tracking, Patch -
New CVE Received by [email protected]
Apr. 27, 2025
Action Type Old Value New Value Added Description 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. Added CVSS V3.1 AV:L/AC:H/PR:N/UI:N/S:C/C:L/I:L/A:L Added CWE CWE-770 Added Reference https://bellard.org/quickjs/Changelog Added Reference https://github.com/bellard/quickjs/commit/1eb05e44fad89daafa8ee3eb74b8520b4a37ec9a Added Reference https://github.com/bellard/quickjs/issues/399 Added Reference https://github.com/quickjs-ng/quickjs/commit/28fa43d3ddff2c1ba91b6e3a788b2d7ba82d1465 Added Reference https://github.com/quickjs-ng/quickjs/issues/1018 Added Reference https://github.com/quickjs-ng/quickjs/pull/1020