How severe is CVE-2025-46687?

CVE-2025-46687 has a CVSS 3.x base score of 5.6, rated medium severity. It is exploitable over local access with high attack complexity, requires no privileges and no user interaction. Impact on confidentiality is low, integrity low, and availability low.

Is CVE-2025-46687 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (21st percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2025-46687?

CVE-2025-46687 primarily affects Bellard Quickjs. In total, 2 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2025-46687?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

Does CVE-2025-46687 have an EU (EUVD) identifier?

Yes. CVE-2025-46687 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-12428.

When was CVE-2025-46687 published?

CVE-2025-46687 was published on 2025-04-27 and last updated on 2026-06-17.

CVE-2025-46687

CVE-2025-46687 is a medium-severity vulnerability in Bellard Quickjs with a CVSS 3.x base score of 5.6. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-770.

Key facts

Severity: Medium (CVSS 3.x base score 5.6)
EPSS exploit prediction: 0% (21st percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2025-12428
Weakness: CWE-770
Affected product: Bellard Quickjs
Published: 2025-04-27
Last modified: 2026-06-17

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.

Frequently asked questions

What is 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. QuickJS before 2025-04-26 is also affected.
How severe is CVE-2025-46687?: CVE-2025-46687 has a CVSS 3.x base score of 5.6, rated medium severity. It is exploitable over local access with high attack complexity, requires no privileges and no user interaction. Impact on confidentiality is low, integrity low, and availability low.
Is CVE-2025-46687 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (21st percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2025-46687?: CVE-2025-46687 primarily affects Bellard Quickjs. In total, 2 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2025-46687?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2025-46687 have an EU (EUVD) identifier?: Yes. CVE-2025-46687 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-12428.
When was CVE-2025-46687 published?: CVE-2025-46687 was published on 2025-04-27 and last updated on 2026-06-17.

References

Affected products (2)

cpe:2.3:a:bellard:quickjs:*:*:*:*:*:*:*:*
cpe:2.3:a:quickjs-ng:quickjs:*:*:*:*:*:*:*:*

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