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CVE-2026-56852

golang.org/x/text: golang.org/x/text: Denial of Service via invalid UTF-8 input

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Severity

Important

Red Hat Product Security

7.5

CVSS 3.1

Review impact separately from score.

Published · July 22, 2026

Updated · November 5, 2026

Description

A flaw was found in golang.org/x/text. The norm.Iter component can enter an infinite loop when processing input that contains invalid UTF-8 (Unicode Transformation Format - 8-bit) bytes. A remote attacker could exploit this vulnerability by providing specially crafted input, leading to a Denial of Service (DoS) condition where the affected application becomes unresponsive.

Statement

Important: This flaw in the golang.org/x/text library can lead to a denial of service. An attacker could provide specially crafted invalid UTF-8 input to an application using the affected norm.Iter functionality, causing it to enter an infinite loop and become unresponsive.

CVSS score applicability

The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.

Mitigation

Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base, or stability.

CVSS / CWE

CVSS 3.1 · 7.5
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

CWE-835 · Loop with Unreachable Exit Condition