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Vulnerabilities

Vulnerability · CVE-2025-46687

quickjs-ng through 0.9.0 has a missing length check in JS_ReadString for a string, leading to a heap-based buffer overflow.

Published Apr 27, 2025 · catalog updated Apr 28, 2025 · QuickJS Project QuickJS

Check if you run it

No confirmed exploitation is on record for CVE-2025-46687. EPSS is 0.30%. Act only if a listed version of QuickJS Project QuickJS is installed.

Gaps on this record

  • No vendor fix or required action is stored. Compare the linked advisory before you change production.
Severity
Medium5.6
Known exploitation
Not in CISA/VulnCheck KEV
EPSS
0.30%
Remediation
Version ranges on file
Affected products
vendor QuickJS Project QuickJS 0 <2025-04-26

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.

Are you affected?

Enter the version you run. The result uses only the ranges stored on this record.

The check returns affected, not affected, or incomplete. It does not guess a version that is missing from the record.

  • vendor QuickJS Project QuickJS 0 <2025-04-260 <2025-04-26

How to fix CVE-2025-46687

What to do

Three questions, each answered from this record only. Confirm the vendor advisory before you patch.

Should you patch?

No confirmed exploitation is on record for CVE-2025-46687. EPSS is 0.30%. Act only if a listed version of QuickJS Project QuickJS is installed.

Which versions are affected?

Compare what you have installed with QuickJS Project QuickJS 0 <2025-04-26 0 <2025-04-26. Compare the installed version with the linked vendor advisory before you change production.

What should an analyst verify?

No weakness class is stored. EPSS 0.30%. There is no CISA KEV listing. No Exploit-DB or Metasploit reference is linked. Use the source links for the original advisory.

Code

The project this record applies to. Exploit listings stay in References.

Timeline

Detection, updates, and resolution for this record.

  1. Apr 27, 2025 · EUVD

    Detected

    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.

  2. Apr 28, 2025 · EUVD

    Updated

    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.

Sources

  • CVE.orgVulnerability recordCVE-2025-46687

    Official CVE identifier

    cve.org
  • FIRST EPSSExploitation probabilityCVE-2025-46687

    30-day exploitation probability 0.3%

    first.org
  • EUVDVulnerability recordEUVD-2025-12428

    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.

    euvd.enisa.europa.eu

References

Freshness

Last verified in this catalog Oct 18, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.