CVE-2026-47080Public exploit

XML injection via unsplit CDATA terminators

Published Aug 21, 2026 · Updated Aug 21, 2026

XML injection in Joshua Nussbaum xml_builder 0.0.7 through 2.4.0 allows attackers to inject markup through crafted CDATA content. The XmlBuilder.escape/1 clause for {:cdata, data} writes data verbatim between CDATA delimiters and fails to split embedded ]]> sequences. Attackers must control bytes passed in a :cdata tuple; early termination makes following bytes ordinary XML elements, text, or entity references for a downstream parser.

CVSS severity2.1
Low
EPSS probability0.17%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

XML injection in Joshua Nussbaum xml_builder 0.0.7 through 2.4.0 allows attackers to inject markup through crafted CDATA content. The XmlBuilder.escape/1 clause for {:cdata, data} writes data verbatim between CDATA delimiters and fails to split embedded ]]> sequences. Attackers must control bytes passed in a :cdata tuple; early termination makes following bytes ordinary XML elements, text, or entity references for a downstream parser.

The record

CVE
CVE-2026-47080
Published
Aug 21, 2026
Updated
Aug 21, 2026
Vendor
Joshua Nussbaum
Product
xml_builder
Classifications
CWE-91, CAPEC-250
Attack vector
local
Privileges
unauthenticated

Timeline

How it unfolded

  1. Aug 21, 2026CVE publishedPublication date reported by the CVE source.
  2. Aug 21, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=0.0.7 <2.4.1
  2. Affected versionversion=26766f884ed19adee1563522c7afb5f056a6f3b5 <bfb1ada071ccc1e384c30f782197ca5154106706

What conditions does exploitation require?

Attack vectorlocal
Required privilegesunauthenticated

What is affected?

Joshua Nussbaum · xml_builderversion=0.0.7 <2.4.1; version=26766f884ed19adee1563522c7afb5f056a6f3b5 <bfb1ada071ccc1e384c30f782197ca5154106706

Published CVSS scores

2.1Erlang Ecosystem FoundationCVSS:4.0/AV:L/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:N/SC:N/SI:L/SA:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-91XML Injection (aka Blind XPath Injection)
CAPEC-250XML Injection

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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