CVE-2026-48590
Element and Attribute Names Injected Verbatim into XML Output in xml_builder
Description
XML Injection vulnerability in joshnuss xml_builder (XmlBuilder module) allows Content Spoofing, XML Injection. This vulnerability is associated with program files lib/xml_builder.ex and program routines XmlBuilder.generate/1, XmlBuilder.generate/2, XmlBuilder.element/1, XmlBuilder.element/2, XmlBuilder.element/3. Element names, attribute names, and doctype identifiers are interpolated verbatim into the serialized XML output without validation or escaping of structural characters (<, >, ", ', &). An attacker who can influence a name argument (for example, an element name derived from a JSON object key or an HTTP form field name) can inject arbitrary XML markup including extra elements, comments, and event-handler attributes into the output document. This issue affects xml_builder: from 0.0.1 before 2.4.1.
INFO
Published Date :
Aug. 21, 2026, 10:16 a.m.
Last Modified :
Aug. 21, 2026, 10:16 a.m.
Remotely Exploit :
No
Source :
6b3ad84c-e1a6-4bf7-a703-f496b71e49db
Affected Products
The following products are affected by CVE-2026-48590
vulnerability.
Even if cvefeed.io is aware of the exact versions of the
products
that
are
affected, the information is not represented in the table below.
No affected product recoded yet
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS 4.0 | LOW | 6b3ad84c-e1a6-4bf7-a703-f496b71e49db | ||||
| CVSS 4.0 | LOW | 6b3ad84c-e1a6-4bf7-a703-f496b71e49db |
Solution
- Update the xml_builder dependency to version 2.4.1 or later.
- Validate all input used for XML element and attribute names.
- Escape structural characters in XML content.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2026-48590.
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-48590 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2026-48590
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2026-48590 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2026-48590 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
New CVE Received by 6b3ad84c-e1a6-4bf7-a703-f496b71e49db
Aug. 21, 2026
Action Type Old Value New Value Added Affected [{'cpes': ['cpe:2.3:a:joshnuss:xml_builder:*:*:*:*:*:*:*:*'], 'repo': 'https://github.com/joshnuss/xml_builder', 'vendor': 'joshnuss', 'modules': ["'Elixir.XmlBuilder'"], 'product': 'xml_builder', 'versions': [{'status': 'affected', 'version': '0.0.1', 'lessThan': '2.4.1', 'versionType': 'semver'}], 'packageURL': 'pkg:hex/xml_builder', 'packageName': 'xml_builder', 'programFiles': ['lib/xml_builder.ex'], 'collectionURL': 'https://repo.hex.pm', 'defaultStatus': 'unaffected', 'programRoutines': [{'name': "'Elixir.XmlBuilder':generate/1"}, {'name': "'Elixir.XmlBuilder':generate/2"}, {'name': "'Elixir.XmlBuilder':element/1"}, {'name': "'Elixir.XmlBuilder':element/2"}, {'name': "'Elixir.XmlBuilder':element/3"}]}, {'cpes': ['cpe:2.3:a:joshnuss:xml_builder:*:*:*:*:*:*:*:*'], 'repo': 'https://github.com/joshnuss/xml_builder', 'vendor': 'joshnuss', 'modules': ["'Elixir.XmlBuilder'"], 'product': 'xml_builder', 'versions': [{'status': 'affected', 'version': '9fb49131ad3ee146a4c9db9bc175bdffe32e30a0', 'lessThan': 'd5c0aec32a8eecbb440fb9bbb0f59d4d188d5859', 'versionType': 'git'}], 'packageURL': 'pkg:github/joshnuss/xml_builder', 'packageName': 'joshnuss/xml_builder', 'programFiles': ['lib/xml_builder.ex'], 'collectionURL': 'https://github.com', 'defaultStatus': 'unaffected', 'programRoutines': [{'name': "'Elixir.XmlBuilder':generate/1"}, {'name': "'Elixir.XmlBuilder':generate/2"}, {'name': "'Elixir.XmlBuilder':element/1"}, {'name': "'Elixir.XmlBuilder':element/2"}, {'name': "'Elixir.XmlBuilder':element/3"}]}] Added Description XML Injection vulnerability in joshnuss xml_builder (XmlBuilder module) allows Content Spoofing, XML Injection. This vulnerability is associated with program files lib/xml_builder.ex and program routines XmlBuilder.generate/1, XmlBuilder.generate/2, XmlBuilder.element/1, XmlBuilder.element/2, XmlBuilder.element/3. Element names, attribute names, and doctype identifiers are interpolated verbatim into the serialized XML output without validation or escaping of structural characters (<, >, ", ', &). An attacker who can influence a name argument (for example, an element name derived from a JSON object key or an HTTP form field name) can inject arbitrary XML markup including extra elements, comments, and event-handler attributes into the output document. This issue affects xml_builder: from 0.0.1 before 2.4.1. Added CVSS V4.0 AV:L/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:N/SC:N/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 Added CWE CWE-91 Added Reference https://cna.erlef.org/cves/CVE-2026-48590.html Added Reference https://github.com/joshnuss/xml_builder/commit/d5c0aec32a8eecbb440fb9bbb0f59d4d188d5859 Added Reference https://github.com/joshnuss/xml_builder/security/advisories/GHSA-r82p-3q2p-728w Added Reference https://osv.dev/vulnerability/EEF-CVE-2026-48590