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Vulnerability record · CVE-2025-12745 · published 5 November 2025

CVE-2025-12745: Bellard quickjs memory buffer overflow vulnerability

Bellard · Quickjs

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.

1.9 CVSS 4.0 Low EPSS 0.20% · top 91.1% CWE-119 · Memory buffer overflowCWE-126 · CWE-126
1.9CVSS 4.0 base score, v2 4.3
0.20%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
10References, 7 tagged exploit
17 Jun 2026Last modified by NVD

Description

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.

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:

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://github.com/bellard/quickjs/commit/c6fe5a98fd3ef3b7064e6e0145dfebfe12449fea Patch
https://github.com/bellard/quickjs/issues/451 ExploitIssue Tracking
https://github.com/bellard/quickjs/issues/451#issue-3533698042 ExploitIssue Tracking
https://github.com/bellard/quickjs/issues/451#issuecomment-3481807558 ExploitIssue Tracking
https://vuldb.com/?ctiid.331268 Permissions RequiredVDB Entry
https://vuldb.com/?id.331268 Third Party AdvisoryVDB Entry
https://vuldb.com/?submit.678850 ExploitThird Party AdvisoryVDB Entry
https://github.com/bellard/quickjs/issues/451 ExploitIssue Tracking
https://github.com/bellard/quickjs/issues/451#issue-3533698042 ExploitIssue Tracking
https://github.com/bellard/quickjs/issues/451#issuecomment-3481807558 ExploitIssue Tracking

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

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Source: NIST National Vulnerability Database (record CVE-2025-12745), CISA KEV, FIRST EPSS (scores of 2026-09-29). This page is refreshed as NVD updates the record.