PatchTheCVECVE-2025-46687: quickjs-ng through 0.9.0 has a missing length check in JS_ReadString for a string, leading to a heap-based buf
CVE-2025-46687 is a medium-severity flaw (CVSS 5.6) affecting quickjs, quickjs. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.
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.
Why this priority
- Public exploit reference
A fixed release or distro patch exists.
Risk facts
| CVSS score | 5.6 (Medium) |
| Attack vector | Local |
| Attack complexity | High |
| Privileges needed | None |
| User interaction | None |
| EPSS exploit chance | 0.3% (top 77%) |
| CISA exploited list | No |
| Weakness | CWE-770 |
| Published | 2025-04-27 |
| Last modified | 2026-06-17 |
Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score
Am I affected?
Timeline
- Published CVE record published
- Updated Record last modified
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.
Quick answers
How do I fix CVE-2025-46687?
quickjs: upgrade to 2025-04-26; quickjs: upgrade to newer than 0.9.0. Exact commands for each OS are on this page.
Is CVE-2025-46687 being exploited?
CVE-2025-46687 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.
What does CVE-2025-46687 affect?
CVE-2025-46687 affects quickjs, quickjs. Severity is medium (CVSS 5.6). 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.
How urgent is CVE-2025-46687?
Priority 30/100. Public exploit reference
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