CVE-2026-0821

HIGH
2026-01-10 [email protected]
7.3
CVSS 3.1
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CVSS Vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L
Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
Low
Integrity
Low
Availability
Low

Lifecycle Timeline

4
Analysis Generated
Mar 12, 2026 - 21:54 vuln.today
PoC Detected
Feb 23, 2026 - 09:16 vuln.today
Public exploit code
Patch Released
Feb 23, 2026 - 09:16 nvd
Patch available
CVE Published
Jan 10, 2026 - 13:15 nvd
HIGH 7.3

Tags

Buffer Overflow Heap Overflow Quickjs Redhat

Description

A vulnerability was determined in quickjs-ng quickjs up to 0.11.0. This vulnerability affects the function js_typed_array_constructor of the file quickjs.c. Executing a manipulation can lead to heap-based buffer overflow. The attack may be launched remotely. The exploit has been publicly disclosed and may be utilized. This patch is called c5d80831e51e48a83eab16ea867be87f091783c5. A patch should be applied to remediate this issue.

Analysis

Heap-based buffer overflow in QuickJS up to version 0.11.0 within the js_typed_array_constructor function allows unauthenticated remote attackers to corrupt memory and potentially execute arbitrary code. Public exploit code exists for this vulnerability, increasing the risk of active exploitation. …

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Remediation

Within 7 days: Identify all affected systems running quickjs-ng quickjs and apply vendor patches promptly. Vendor patch is available.

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Priority Score

57
Low Medium High Critical
KEV: 0
EPSS: +0.1
CVSS: +36
POC: +20

Vendor Status

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CVE-2026-0821 vulnerability details – vuln.today
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