CVE-2026-71497: jsoup Cleaner May Expose Markup With Vulnerability

MODERATE
Advisory Identifier: GHSA-pmhh-3w7g-xqp8
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CVSS 4.7
CWE-79
Published
Advisory Summary

CVE-2026-71497 is a MODERATE (CVSS 4.7) cleaner may expose markup with vulnerability (CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')) affecting jsoup libraries in the Maven ecosystem. The issue involves cleaner may expose markup with custom raw-text elements. Remediation is available by upgrading affected packages to version 1.23.1.

CVE-2026-71497 at a Glance

CVE Identifier CVE-2026-71497
GHSA Identifier GHSA-pmhh-3w7g-xqp8
Severity MODERATE
CVSS v3.1 Base Score 4.7
CWE Classification CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
Affected Product jsoup
Package Ecosystem Maven
Published Date
Last Updated

Security Impact

CVSS: 4.7

The security impact metrics below are parsed directly from the CVSS v3.1 vector string (CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:L/I:L/A:N).

Attack Vector Network (AV:N)
Attack Complexity High (AC:H)
Privileges Required None (PR:N)
User Interaction Required (UI:R)
Scope Changed (S:C)
Confidentiality Low (C:L)
Integrity Low (I:L)
Availability None (A:N)

How to Fix CVE-2026-71497

To remediate this vulnerability, upgrade all affected jsoup dependencies to a patched release. Both direct and transitive dependencies should be checked, as frameworks or security libraries may pull in vulnerable versions transitively.

org.jsoup:jsoup fixed: 1.23.1 
<dependency>
    <groupId>org.jsoup</groupId>
    <artifactId>jsoup</artifactId>
    <version>1.23.1</version>
</dependency>
Verify Direct and Transitive Dependencies

Run the following command in your project directory to verify that all resolved dependencies use the patched release: 

mvn dependency:tree -Dincludes=org.jsoup

How to Check if You Are Affected

To determine whether your Java application is affected by CVE-2026-71497, inspect your build dependencies using the Maven Dependency Plugin:

mvn dependency:tree -Dincludes=org.jsoup

Analyze the terminal output to locate any version of jsoup in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than 1.23.1), your application is affected.

Note: The mvn dependency:tree -Dincludes=org.jsoup command inspects the resolved dependency graph declared in your project's POM files; it does not perform automated security scanning or inspect runtime dynamic classpaths. Always verify runtime container classpaths and shaded JARs.

Technical Details

Vulnerability Mechanism & Technical Analysis

This vulnerability is classified under CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting'), where the product does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users. In jsoup, software state validation or input boundaries are circumvented during processing. Review the official source advisory statement below for specific affected components, classes, and reproduction details.

Source Advisory Statement

When a custom `Safelist` permits certain raw-text elements, jsoup may incorrectly sanitize malformed HTML containing a tag name that ends in a control character. The tag may acquire the parsing behavior of a different element, causing content that should remain text to be emitted as active markup after serialization and potentially allowing XSS. jsoup’s built-in Safelists are unaffected. ## Patches Upgrade to jsoup 1.23.1. ## Workarounds Until upgrading, do not permit raw-text elements in custom Safelists used to clean untrusted HTML. ## Additional security considerations This fix addresses malformed tag-name handling only. Permitting raw-text elements in a custom `Safelist` does not make their contents inherently safe. For example, applications that permit `style` must apply appropriate CSS safeguards separately, because jsoup does not parse or sanitize CSS.

CVE-2026-71497 Affected jsoup Versions

1 component(s)
Fixed Versions:
1.23.1
Product / Package Ecosystem Affected Versions Fixed Version
org.jsoup:jsoup
maven/org.jsoup/jsoup
Maven
≥ 1.14.3
< 1.23.1
1.23.1

References

GitHub Advisory / Wiki ADVISORY
https://github.com/jhy/jsoup/security/advisories/GHSA-pmhh-3w7g-xqp8
jsoup Source Repository REPOSITORY
https://github.com/jhy/jsoup/issues/2538
Security Fix Commit FIX COMMIT
https://github.com/jhy/jsoup/commit/92f1aca552548b484bc7d4b94c51e48b8e6eca70
jsoup Source Repository REPOSITORY
https://github.com/jhy/jsoup
jsoup Release RELEASE
https://github.com/jhy/jsoup/releases/tag/jsoup-1.23.1

Frequently Asked Questions

What is CVE-2026-71497?
CVE-2026-71497 is a security vulnerability in jsoup involving Cleaner may expose markup with custom raw-text elements under CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting').
Which jsoup versions are affected?
Affected versions include releases prior to 1.23.1 across affected packages: org.jsoup:jsoup.
What version fixes CVE-2026-71497?
Upgrading to 1.23.1 (or the latest patched release for your respective branch) resolves the vulnerability.
Is jsoup affected?
Yes, org.jsoup:jsoup is affected in releases prior to 1.23.1. Upgrade your dependency to 1.23.1 or later.
What is the CVSS score of CVE-2026-71497?
CVE-2026-71497 has a CVSS v3.1 base score of 4.7 (MODERATE) with vector string CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:L/I:L/A:N.
What CWE is associated with CVE-2026-71497?
CVE-2026-71497 is classified under CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') (The product does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users.).
How can I check Maven dependencies for CVE-2026-71497?
Run the dependency tree command: 'mvn dependency:tree -Dincludes=org.jsoup'. This command lists direct and transitive dependencies in your build configuration so you can verify if a vulnerable version is resolved.
Machine-readable OSV JSON OSV v1.5 Schema
Normalized schema output
View Raw JSON 
{
  "schema_version" : "1.4.0",
  "id" : "GHSA-pmhh-3w7g-xqp8",
  "modified" : "2026-08-06T21:09:36Z",
  "published" : "2026-08-06T21:09:36Z",
  "aliases" : [ "CVE-2026-71497" ],
  "summary" : "jsoup: Cleaner may expose markup with custom raw-text elements",
  "details" : "When a custom `Safelist` permits certain raw-text elements, jsoup may incorrectly sanitize malformed HTML containing a tag name that ends in a control character. The tag may acquire the parsing behavior of a different element, causing content that should remain text to be emitted as active markup after serialization and potentially allowing XSS.\n\njsoup’s built-in Safelists are unaffected.\n\n## Patches\n\nUpgrade to jsoup 1.23.1.\n\n## Workarounds\n\nUntil upgrading, do not permit raw-text elements in custom Safelists used to clean untrusted HTML.\n\n## Additional security considerations\n\nThis fix addresses malformed tag-name handling only.\n\nPermitting raw-text elements in a custom `Safelist` does not make their contents inherently safe. For example, applications that permit `style` must apply appropriate CSS safeguards separately, because jsoup does not parse or sanitize CSS.",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:L/I:L/A:N"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "Maven",
      "name" : "org.jsoup:jsoup"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "1.14.3"
      }, {
        "fixed" : "1.23.1"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "WEB",
    "url" : "https://github.com/jhy/jsoup/security/advisories/GHSA-pmhh-3w7g-xqp8"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/jhy/jsoup/issues/2538"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/jhy/jsoup/commit/92f1aca552548b484bc7d4b94c51e48b8e6eca70"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/jhy/jsoup"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/jhy/jsoup/releases/tag/jsoup-1.23.1"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-79" ],
    "severity" : "MODERATE",
    "github_reviewed" : true,
    "github_reviewed_at" : "2026-08-06T21:09:36Z",
    "nvd_published_at" : null
  }
}