Heap-based Buffer Overflow in quickjs by quickjs-ng
CVE-2026-0822

5.3MEDIUM

Key Information:

Vendor

Quickjs-ng

Status
Quickjs
Vendor
CVE Published:
10 January 2026

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2026-0822?

A vulnerability has been detected in quickjs-ng's quickjs version 0.11.0 and earlier, specifically in the js_typed_array_sort function found in quickjs.c. This flaw allows attackers to perform remote exploitation through a heap-based buffer overflow, potentially leading to unauthorized access and compromise of systems running the affected version. As exploits for this vulnerability are publicly available, it is crucial for users to apply the available patch (identifier: 53eefbcd695165a3bd8c584813b472cb4a69fbf5) to mitigate risk.

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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-2026-0822 - Proof of Concept

References

https://vuldb.com/?id.340356
vdb-entrytechnical-description
https://vuldb.com/?ctiid.340356
signaturepermissions-required
https://vuldb.com/?submit.731783
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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