Heap-Based Buffer Overflow in QuickJS by QuickJS-ng
CVE-2026-1145

5.3MEDIUM

Key Information:

Vendor

Quickjs-ng

Status
Quickjs
Vendor
CVE Published:
19 January 2026

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2026-1145?

A vulnerability has been identified in QuickJS by QuickJS-ng, specifically within the js_typed_array_constructor_ta function in quickjs.c. This flaw allows for a heap-based buffer overflow that can be exploited remotely. Attackers may leverage this vulnerability to manipulate memory and potentially execute malicious code. A patch (commit 53aebe66170d545bb6265906fe4324e4477de8b4) has been developed to rectify this issue. It is crucial for users to apply this patch promptly to mitigate the risk associated with this vulnerability.

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Affected Version(s)

quickjs 0.1

quickjs 0.2

quickjs 0.3

Exploit Proof of Concept (PoC)

PoC code is written by security researchers to demonstrate the vulnerability can be exploited. PoC code is also a key component for weaponization which could lead to ransomware.

CVE-2026-1145 - Proof of Concept

References

https://vuldb.com/?id.341738
vdb-entrytechnical-description
https://vuldb.com/?ctiid.341738
signaturepermissions-required
https://vuldb.com/?submit.735539
third-party-advisory

CVSS V4

Score:
5.3
Severity:
MEDIUM
Confidentiality:
Low
Integrity:
Low
Availability:
Low
Attack Vector:
Network
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
Unknown

Timeline

  • 🟡

    Public PoC available

  • 👾

    Exploit known to exist

  • Vulnerability published

  • Vulnerability Reserved

Credit

mcsky23 (VulDB User)
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