CVE-2026-15920: Software Security Vulnerability Vulnerability

MODERATE
Advisory Identifier: GHSA-8rmj-xgq5-w9qm
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CVSS 6.1
CWE-83
Published
Advisory Summary

CVE-2026-15920 is a MODERATE (CVSS 6.1) security vulnerability vulnerability (CWE-83: Improper Neutralization of Script in Attributes in a Web Page) affecting Software libraries in the Maven ecosystem. The weakness occurs when the product does not neutralize or incorrectly neutralizes "javascript:" or other uris from dangerous attributes within tags, such as onmouseover, onload, onerror, or style.. Remediation is available in the latest vendor maintenance releases.

CVE-2026-15920 at a Glance

CVE Identifier CVE-2026-15920
GHSA Identifier GHSA-8rmj-xgq5-w9qm
Severity MODERATE
CVSS v3.1 Base Score 6.1
CWE Classification CWE-83: Improper Neutralization of Script in Attributes in a Web Page
Affected Product Software
Package Ecosystem Maven
Published Date
Last Updated

Security Impact

CVSS: 6.1

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

Attack Vector Network (AV:N)
Attack Complexity Low (AC:L)
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-2026-15920

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

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

How to Check if You Are Affected

To determine whether your Java application is affected by CVE-2026-15920, inspect your build dependencies using the Maven Dependency Plugin:

mvn dependency:tree

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

Note: The mvn dependency:tree 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-83: Improper Neutralization of Script in Attributes in a Web Page, where the product does not neutralize or incorrectly neutralizes "javascript:" or other uris from dangerous attributes within tags, such as onmouseover, onload, onerror, or style. In Software, 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

An issue was discovered in Django 5.2 before 5.2.17 and 6.0 before 6.0.8. `django.contrib.admin.utils.display_for_field()` renders `URLField` values as clickable links in the admin without validating the URL. A value stored with an unsafe scheme is displayed as a link on changelist and read-only admin pages, which allows cross-site scripting against staff users who click the link. Exploitation requires the unsafe value to already be stored in the database. `URLField` validation through a `ModelForm` or the admin rejects unsafe schemes, so this affects applications that persist `URLField` data without running model validation, for example through direct queryset writes, deserialization, or bulk import of untrusted input. Django would like to thank Egor Saltykov for reporting this issue.

References

NVD — CVE-2026-15920 NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-15920
Security Fix Commit FIX COMMIT
https://github.com/django/django/commit/13debb622a32720bda1bccda7622fd14fbf3931b
Security Fix Commit FIX COMMIT
https://github.com/django/django/commit/47511a21026cdd721d8fbf8571cc079bc38bb46d
Security Fix Commit FIX COMMIT
https://github.com/django/django/commit/5a260d309a4c8010c2ebda24eb758a5d95e2508a
Security Fix Commit FIX COMMIT
https://github.com/django/django/commit/b9adb81339cc418f8f56b1050cca6dfec3ab6349
Software Release RELEASE
https://docs.djangoproject.com/en/dev/releases/security
groups.google.com/g/django-announce WEB
https://groups.google.com/g/django-announce
Software Release RELEASE
https://www.djangoproject.com/weblog/2026/aug/04/security-releases

Frequently Asked Questions

What is CVE-2026-15920?
CVE-2026-15920 is a security vulnerability in Software classified as a security vulnerability vulnerability under CWE-83: Improper Neutralization of Script in Attributes in a Web Page.
Which Software versions are affected?
Affected versions include releases prior to current release patches.
What version fixes CVE-2026-15920?
Upgrading to current release patches (or the latest patched release for your respective branch) resolves the vulnerability.
What is the CVSS score of CVE-2026-15920?
CVE-2026-15920 has a CVSS v3.1 base score of 6.1 (MODERATE) with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N.
What CWE is associated with CVE-2026-15920?
CVE-2026-15920 is classified under CWE-83: Improper Neutralization of Script in Attributes in a Web Page (The product does not neutralize or incorrectly neutralizes "javascript:" or other URIs from dangerous attributes within tags, such as onmouseover, onload, onerror, or style.).
How can I check Maven dependencies for CVE-2026-15920?
Run the dependency tree command: 'mvn dependency:tree'. 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-8rmj-xgq5-w9qm",
  "modified" : "2026-08-04T18:31:27Z",
  "published" : "2026-08-04T18:31:27Z",
  "aliases" : [ "CVE-2026-15920" ],
  "details" : "An issue was discovered in Django 5.2 before 5.2.17 and 6.0 before 6.0.8.\n`django.contrib.admin.utils.display_for_field()` renders `URLField` values as clickable links in the admin without validating the URL. A value stored with an unsafe scheme is displayed as a link on changelist and read-only admin pages, which allows cross-site scripting against staff users who click the link.\nExploitation requires the unsafe value to already be stored in the database. `URLField` validation through a `ModelForm` or the admin rejects unsafe schemes, so this affects applications that persist `URLField` data without running model validation, for example through direct queryset writes, deserialization, or bulk import of untrusted input.\nDjango would like to thank Egor Saltykov for reporting this issue.",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N"
  }, {
    "type" : "CVSS_V4",
    "score" : "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X"
  } ],
  "affected" : [ ],
  "references" : [ {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2026-15920"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/django/django/commit/13debb622a32720bda1bccda7622fd14fbf3931b"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/django/django/commit/47511a21026cdd721d8fbf8571cc079bc38bb46d"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/django/django/commit/5a260d309a4c8010c2ebda24eb758a5d95e2508a"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/django/django/commit/b9adb81339cc418f8f56b1050cca6dfec3ab6349"
  }, {
    "type" : "WEB",
    "url" : "https://docs.djangoproject.com/en/dev/releases/security"
  }, {
    "type" : "WEB",
    "url" : "https://groups.google.com/g/django-announce"
  }, {
    "type" : "WEB",
    "url" : "https://www.djangoproject.com/weblog/2026/aug/04/security-releases"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-83" ],
    "severity" : "MODERATE",
    "github_reviewed" : false,
    "github_reviewed_at" : null,
    "nvd_published_at" : "2026-08-04T17:16:46Z"
  }
}