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TI-2026-57704 Aliases CVE-2026-83605GHSA-4w3w-2rp5-g8jm

xmldom: Attribute name injection via setAttribute() bypasses requireWellFormed

Priority HIGH 77CWE-91Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
Low
Attack requirements
None
Impact type
—
Confidentiality · integrity · availability
None · High · None
Fix status
Partial Red Hat: 1 fixed, 2 without a fix

Attack profile from CVSS 4.0 · CNA. Fix status from CNA, GitHub and Red Hat.

Summary

xmldom is a pure JavaScript W3C standard-based (XML DOM Level 2 Core) DOMParser and XMLSerializer module. Prior to @xmldom/xmldom versions 0.8.14 and 0.9.11, and in xmldom version 0.6.0 and earlier, Element.setAttribute() calls the private _createAttribute(name) path without validating the attribute name, while Document.createAttribute(name) validates against QName. XMLSerializer.serializeToString() emits attribute names verbatim, and requireWellFormed: true did not validate them, so a crafted name can terminate the intended attribute and inject additional attributes, including event handlers, into browser-consumed output; synthesized xmlns:PREFIX declarations expose the same unchecked-name boundary. This issue is fixed in @xmldom/xmldom versions 0.8.14 and 0.9.11; no fixed version is available for xmldom.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.00612 49th percentileScored 2026-11-07
Fix Partial xmldom (@xmldom): 0.8.14, 0.9.11@xmldom/xmldom (npm): 0.9.11, 0.8.14Red Hat: 1 advisoryRed Hat: 1 fixed, 2 without a fix

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
Poc
Automatable
Yes
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
xmldomxmldomup to 0.6.0—No fix listedCNA
xmldomxmldom0.7.0 to before 0.8.14; 0.9.0 to before 0.9.110.8.14, 0.9.11Patch availableCNA
—@xmldom/xmldom (npm)0.9.0 to before 0.9.110.9.11Patch availableGHSA-4w3w-2rp5-g8jm
—@xmldom/xmldom (npm)0.7.0 to before 0.8.140.8.14Patch availableGHSA-4w3w-2rp5-g8jm
—xmldom (npm)up to 0.6.0—No fix listedGHSA-4w3w-2rp5-g8jm
  • xmldom Vendorxmldom Affected up to 0.6.0 Fixed in — No fix listed CNA
  • xmldom Vendorxmldom Affected 0.7.0 to before 0.8.14; 0.9.0 to before 0.9.11 Fixed in 0.8.14, 0.9.11 Patch available CNA
  • @xmldom/xmldom (npm) Vendor— Affected 0.9.0 to before 0.9.11 Fixed in 0.9.11 Patch available GHSA-4w3w-2rp5-g8jm
  • @xmldom/xmldom (npm) Vendor— Affected 0.7.0 to before 0.8.14 Fixed in 0.8.14 Patch available GHSA-4w3w-2rp5-g8jm
  • xmldom (npm) Vendor— Affected up to 0.6.0 Fixed in — No fix listed GHSA-4w3w-2rp5-g8jm

Remediation

  • Fix · CNA xmldom (@xmldom) Fixed in 0.8.14, 0.9.11
  • Fix · GHSA-4w3w-2rp5-g8jm @xmldom/xmldom (npm) Fixed in 0.9.11 Advisory →
  • Fix · GHSA-4w3w-2rp5-g8jm @xmldom/xmldom (npm) Fixed in 0.8.14 Advisory →

Red Hat 1 advisory

  • RHSA-2026:69248 Released 2026-09-21 · Red Hat rating Important
    Red Hat Developer Hub 1.9.9 release.
    • Red Hat Developer Hub 1.9 registry.redhat.io/rhdh/rhdh-hub-rhel9, registry.redhat.io/rhdh/rhdh-rhel9-operator

Vendor assessments

Red Hat

Red Hat rating: Important. Red Hat's page for this CVE →

ProductStatusPlan or fix
Red Hat Build of Podman DesktopAffectedNo fix yet
Red Hat Fuse 7AffectedNo fix planned: Will not fix
Red Hat Developer Hub 1.9Fixed RHSA-2026:69248
Not affected: 6 products
  • Red Hat Developer Hub 1.9
  • Red Hat Enterprise Linux 10
  • Red Hat Enterprise Linux 8
  • Red Hat Enterprise Linux 9
  • Red Hat OpenShift AI (RHOAI)
  • Red Hat OpenShift Container Platform 4

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-83605
  2. 2026-10-03 Alias added: GHSA-4w3w-2rp5-g8jm

References

Advisory 1

Other 8

  • TI-2022-18728 xmldom allows multiple root nodes in a DOM CVSS 3.1CRITICAL 9.8
  • TI-2026-57717 xmldom: requireWellFormed DocType publicId/systemId validation is bypassable via an embedded line terminator CVSS 4.0HIGH 8.7
  • TI-2026-57716 xmldom: requireWellFormed element/attribute name validation is bypassable via an embedded line terminator CVSS 4.0HIGH 8.7
  • TI-2026-57715 xmldom: Processing Instruction Target Injection Bypasses requireWellFormed CVSS 4.0HIGH 8.7
  • TI-2026-57714 xmldom: Quadratic-memory consumption CVSS 4.0HIGH 8.7
  • TI-2026-57712 xmldom: Quadratic-time attribute deduplication CVSS 4.0HIGH 8.7
See all 23 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences