Invoking denial of service when parsing arbitrary HTML in golang.org/x/net/html

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PT-2026-43458

Name of the Vulnerable Software and Affected Versions LiquidJS versions prior to 10.26.0 Description A flaw in the strip html filter logic allows for Cross-Site Scripting XSS. The filter is designed to remove HTML tags from strings to act as a sanitizer; however, it uses a regular expression wher...

GHSA-5CV4-JP36-H3MW Go Net HTML parser is vulnerable to denial of service

In Go Net golang.org/x/net before verion 0.55.0, parsing arbitrary HTML can consume excessive CPU time, possibly leading to denial of service...

Cross-site Scripting (XSS)

Overview golang.org/x/net/html is a package that implements an HTML5-compliant tokenizer and parser. Affected versions of this package are vulnerable to Cross-site Scripting XSS via the writeQuoted function, which does not properly handle characters in DOCTYPE data. An attacker can cause the...

Cross-site Scripting (XSS)

Overview golang.org/x/net/html is a package that implements an HTML5-compliant tokenizer and parser. Affected versions of this package are vulnerable to Cross-site Scripting XSS via the childTextNodesAreLiteral function in render.go. An attacker can cause the execution of scripts in the context o...

AZL-87152 CVE-2026-42506 affecting package azl-otel-collector 0.127.0-1

Parsing arbitrary HTML which is then rendered using Render can result in an unexpected HTML tree. This can be leveraged to execute XSS attacks in applications that attempt to sanitize input HTML before rendering...

AZL-87558 CVE-2026-27136 affecting package containerized-data-importer for versions less than 1.62.0-6

Parsing arbitrary HTML which is then rendered using Render can result in an unexpected HTML tree. This can be leveraged to execute XSS attacks in applications that attempt to sanitize input HTML before rendering...

CVE-2026-27136 Invoking duplicate attributes can cause XSS in golang.org/x/net/html

Parsing arbitrary HTML which is then rendered using Render can result in an unexpected HTML tree. This can be leveraged to execute XSS attacks in applications that attempt to sanitize input HTML before rendering...

CVE-2026-25680 Invoking denial of service when parsing arbitrary HTML in golang.org/x/net/html

Parsing arbitrary HTML can consume excessive CPU time, possibly leading to denial of service...

CVE-2026-25681 Invoking incorrect handling of character references in DOCTYPE nodes in golang.org/x/net/html

Parsing arbitrary HTML which is then rendered using Render can result in an unexpected HTML tree. This can be leveraged to execute XSS attacks in applications that attempt to sanitize input HTML before rendering...

GO-2026-5029 Invoking incorrect handling of character references in DOCTYPE nodes in golang.org/x/net/html

Parsing arbitrary HTML which is then rendered using Render can result in an unexpected HTML tree. This can be leveraged to execute XSS attacks in applications that attempt to sanitize input HTML before rendering...

Unity Linux 20.1050e / 20.1060e / 20.1070-8ae / 20.1070e Security Update: rubygem-nokogiri (UTSA-2026-016636)

The Unity Linux 20 host has a package installed that is affected by a vulnerability as referenced in the UTSA-2026-016636 advisory. Nokogiri is a Rubygem providing HTML, XML, SAX, and Reader parsers with XPath and CSS selector support. In Nokogiri v1.12.4 and earlier, on JRuby only, the SAX parse...

CLSA-2026-1779213441 python3.11: Fix of 11 CVEs

CVE-2026-4224: avoid unbound C recursion in convcontentmodel in pyexpat - CVE-2026-3644: reject control characters in http.cookies.Morsel.update - CVE-2026-0672: reject control characters in http.cookies.Morsel - CVE-2025-8291: check consistency of zip64 end of central directory record -...

python-markdown: denial of service via malformed HTML-like sequences

A flaw was found in Python-Markdown. Parsing crafted markdown content containing malformed HTML-like sequences causes html.parser.HTMLParser to raise an unhandled AssertionError. This unhandled exception allows an attacker to cause an application crash and potentially disclose sensitive informati...

openSUSE 16 Security Update : apptainer (openSUSE-SU-2026:20730-1)

The remote openSUSE 16 host has packages installed that are affected by multiple vulnerabilities as referenced in the openSUSE-SU-2026:20730-1 advisory. Changes in apptainer: - Fix CVE-2026-34986 bsc1262956 github.com/go-jose/go-jose/[email protected] CVE-2026-33186 GO-2026-4762 bsc1260311...

OPENSUSE-SU-2026:20730-1 Security update for apptainer

This update for apptainer fixes the following issues: Changes in apptainer: - Fix CVE-2026-34986 bsc1262956 github.com/go-jose/go-jose/[email protected] CVE-2026-33186 GO-2026-4762 bsc1260311 google.golang.org/[email protected] CVE-2026-24137 GO-2026-4358 bsc1264177 github.com/sigstore/[email protected] Fix...

Unity Linux 20.1060e / 20.1070e Security Update: clamav (UTSA-2026-017369)

The Unity Linux 20 host has a package installed that is affected by a vulnerability as referenced in the UTSA-2026-017369 advisory. On April 20, 2022, the following vulnerability in the ClamAV scanning library versions 0.103.5 and earlier and 0.104.2 and earlier was disclosed: A vulnerability in...

CLSA-2026-1778129970 python3.11: Fix of 7 CVEs

CVE-2026-0672: reject control characters in http.cookies cookie names, values, and parameters to prevent header injection - CVE-2026-3644: reject control characters in Morsel.update, |= operator, and unpickling paths missed by CVE-2026-0672; add output validation to BaseCookie.jsoutput -...

python-markdown: denial of service via malformed HTML-like sequences

A flaw was found in Python-Markdown. Parsing crafted markdown content containing malformed HTML-like sequences causes html.parser.HTMLParser to raise an unhandled AssertionError. This unhandled exception allows an attacker to cause an application crash and potentially disclose sensitive informati...

SUSE CVE-2026-6019

http.cookies.Morsel.jsoutput returns an inline snippet and only escapes " for JavaScript string context. It does not neutralize the HTML parser-sensitive sequence inside the generated script element. Mitigation base64-encodes the cookie value to disallow escaping using cookie value...