HighCVE-2026-41673

    xmldom: Denial of service via uncontrolled recursion in XML serialization (CVE-2026-41673)

    Published Last modified Sources: Red Hat, Msrc Update Guide, OSV, CVE.org, EUVD, BSI

    What is affected, what to do

    A flaw was found in the `xmldom` library, a JavaScript module for parsing XML documents. An attacker could exploit this vulnerability by providing a specially crafted, deeply nested XML document.

    Update App Connect Enterprise to version 13.0.7.1.

    Affected
    • Xmldom eq xmldom <= 0.6.0..xmldom <= 0.6.0
    • Xmldom eq @xmldom/xmldom >= 0.9.0, < 0.9.10..@xmldom/xmldom >= 0.9.0, < 0.9.10
    • Xmldom eq @xmldom/xmldom < 0.8.13..@xmldom/xmldom < 0.8.13

    Not sure whether and how you are affected? Ask a question about this vulnerability

    Metrics

    8.7

    Priority

    XIEM Effective CVSS: highest available CVSS rating from NVD and vendor data.

    Source: NVD, CVSS v4

    7.5

    CVSS v3

    Severity High on the scale from 0 to 10.

    Source: Red Hat, Msrc Update Guide, OSV, CVE.org, EUVD, BSI

    0.6 %

    EPSS score

    Low — model estimates < 1% exploitation likelihood.

    Source: FIRST EPSS, percentile 50.7

    Show all metrics
    Severity
    High
    Priority (0–325)

    The priority score is a consolidated metric that condenses several individual signals into a single, action-guiding ranking: technical severity (CVSS), exploitation likelihood (EPSS), known-exploited status (KEV) and the context of the affected asset. The aim is to answer the only truly important question in vulnerability management: what first?

    Read in glossary
    81.15 Methodology
    Exploit maturity

    An exploit is code or a technique that specifically uses a concrete vulnerability to force unintended behaviour — such as executing code or escalating privileges. It is the tool that turns a theoretical flaw into a practical attack.

    Read in glossary
    no public PoC known
    XIEM Effective CVSS

    XIEM® is the tiered managed-security operating model from NEOSEC and a registered trademark of NEOSEC GmbH. It extends classic SIEM — the central collection, normalisation and correlation of security-relevant events — with endpoint forensics, network visibility and deception technology, and consolidates them into three building tiers: Sentry, Orchestrate and Command.

    Read in glossary
    8.7 Methodology
    CVSS v3

    CVSS is the globally established, open standard for assessing the technical severity of a vulnerability on a scale from 0 to 10. It describes how easily a flaw can be exploited and what damage it can cause — but not how likely its actual exploitation is. CVSS and the complementary EPSS deliberately answer different questions.

    Read in glossary
    7.5
    CVSS v4

    CVSS is the globally established, open standard for assessing the technical severity of a vulnerability on a scale from 0 to 10. It describes how easily a flaw can be exploited and what damage it can cause — but not how likely its actual exploitation is. CVSS and the complementary EPSS deliberately answer different questions.

    Read in glossary
    8.7
    EPSS score

    The EPSS score is the absolute model output for an individual vulnerability: the estimated probability of real-world exploitation within the next 30 days, expressed as a value between 0 and 1 (i.e. 0 % to 100 %). A score of 0.42 means „the model estimates a 42 % chance of real-world exploitation within 30 days“.

    Read in glossary
    0.6 %
    Low — model estimates < 1% exploitation likelihood.
    EPSS percentile

    The EPSS percentile is the relative position of a vulnerability within all EPSS-scored CVEs, expressed as a value between 0 and 1. A percentile of 0.90 means „this CVE has a higher EPSS score than 90 % of all other scored CVEs“. Unlike the EPSS score, it is not a probability — but a positioning within a ranking.

    Read in glossary
    50.7
    High — this CVE ranks above the median of all CVEs scored today (rank ≥ 36%).
    KEV status

    The KEV catalogue is a list maintained by the US authority CISA of vulnerabilities for which active exploitation in the wild has been confirmed. It answers not the question „how severe?“ but „is it already being attacked?“ — thereby sharply prioritising patching.

    Read in glossary
    —
    Published
    CISA assessment (SSVC)
    Exploitation: proof of concept · automatable · Technical impact: partial
    Source: CISA Vulnrichment, as of 7 May 2026
    CWE

    CWE is a catalogue of typical weakness types in software and hardware — such as flawed input validation, unsafe memory handling or poor authentication. Where a CVE names a concrete vulnerability in a concrete product, a CWE describes the underlying class of defect.

    Read in glossary
    CWE-674

    Detection rules

    No NEOSEC detection rule is available for this vulnerability yet.

    Classification under NIS2 and CRA

    Rule-based classification from exploitation status and severity. It does not replace a case-by-case assessment.

    NIS2

    NIS2 is EU Directive (EU) 2022/2555 to raise the level of cybersecurity across the Union. It substantially broadens obligations compared with the first NIS directive: more sectors, mandatory risk management, staged reporting duties and personal accountability of senior management.

    Read in glossary
    High technical severity: assess and remediate the vulnerability in vulnerability handling under Art. 21(2)(e) NIS2 and document the decision.
    CRA

    The CRA is EU Regulation (EU) 2024/2847 setting horizontal cybersecurity requirements for „products with digital elements“ — from industrial controllers and software to connected consumer devices. For the first time manufacturers must ensure security across the entire product lifecycle, handle vulnerabilities and provide security updates.

    Read in glossary
    From 11.12.2027, Annex I Part II CRA requires manufacturers of affected products with digital elements to handle vulnerabilities without delay and provide security updates.
    ISO/IEC 27001

    ISO/IEC 27001 is the internationally leading standard for an information security management system (ISMS). It describes a risk-based, process-oriented framework to systematically plan, implement, review and improve information security.

    Read in glossary
    Control A.8.8, management of technical vulnerabilities: assess relevance to your systems, plan remediation and keep evidence.

    Description

    A flaw was found in the `xmldom` library, a JavaScript module for parsing XML documents. An attacker could exploit this vulnerability by providing a specially crafted, deeply nested XML document. This could lead to a Denial of Service (DoS) by causing the application to crash due to excessive recursion.

    Source: redhat_csaf, Microsoft Security Update Guide, OSV (Open Source Vulnerabilities), cvelistv5, NVD (NIST), CVE.org (MITRE), ENISA EUVD, BSI CSAF, BSI WID Portal

    Affected products

    The following versions are affected. Older releases of the same product line are also vulnerable unless stated otherwise.

    Affected products
    Affected versionsFixed in
    xmldomxmldom
    • xmldom <= 0.6.0
    • @xmldom/xmldom < 0.8.13
    • @xmldom/xmldom >= 0.9.0, < 0.9.10
    • —
    • —
    • —
    HCLBigFix
    • WebUI Applications
    • —
    IBMApp Connect Enterprise
    • < 13.0.7.1
    • < 12.0.12.26
    • 13.0.7.1
    • 12.0.12.26
    npm@xmldom/xmldom
    • —
    • 0.9.0
    • —
    • —
    npmxmldom
    • —
    • —

    Vendors and products

    Weakness classes (CWE)

    • CWE-674Uncontrolled Recursion

      Class

      The product does not properly control the amount of recursion that takes place, consuming excessive resources, such as allocated memory or the program stack.

      Entry at MITRE CWE-674

    References & sources

    • github.comxmldom/xmldom/security/advisories/GHSA-2v35-w6hq-6mfwweb, x_refsource_CONFIRM
    • NVD (NIST)vuln/detail/CVE-2026-41673advisory
    • github.comxmldom/xmldom/commit/17678a2a73ecbd1a2da90f3d47dc23da9cef81aaweb, x_refsource_MISC
    • github.comxmldom/xmldom/commit/291257493cb0eb6980eda83b162a9c4e6d7d2597web, x_refsource_MISC
    • github.comxmldom/xmldom/commit/2d6d6916ed8a4c223db1f6d7560ab4544c465b0fweb, x_refsource_MISC
    • github.comxmldom/xmldom/commit/430357c7b6333108856e917bf2367afe5ceb6f8aweb, x_refsource_MISC
    • github.comxmldom/xmldom/commit/4845ef109221df0890825de2822fbe77afba3afeweb, x_refsource_MISC
    • github.comxmldom/xmldom/commit/8834218c85ac2a4d757b9587c9028e67c2f7b6c3web, x_refsource_MISC
    • github.comxmldom/xmldom/commit/8b7cfd1491314abdc347261921d7334ff15f7112web, x_refsource_MISC
    • github.comxmldom/xmldom/commit/b0620383abc1df067f3ce1014c43ae1bc1161eebweb, x_refsource_MISC
    • github.comxmldom/xmldom/commit/e6edcab6bef5bcdba0b220bb35442aa72f452b84web, x_refsource_MISC
    • github.comxmldom/xmldompackage
    • github.comxmldom/xmldom/releases/tag/0.8.13web, x_refsource_MISC
    • github.comxmldom/xmldom/releases/tag/0.9.10web, x_refsource_MISC
    • access.redhat.comsecurity/cve/CVE-2026-41673Vulnerability database, x_refsource_REDHAT
    • bugzilla.redhat.comRHBZ#2467630Issue tracking, x_refsource_REDHAT
    • security.access.redhat.comdata/csaf/v2/vex/2026/cve-2026-41673.jsonx_sadp-csaf-vex
    • access.redhat.comerrata/RHSA-2026:26234Vendor advisory, x_refsource_REDHAT
    • access.redhat.comerrata/RHSA-2026:60520Vendor advisory, x_refsource_REDHAT

    Changes to this CVE

    Who changed this CVE and when: NVD (analysis, affected products, CVSS), the CVE publisher (CNA) and additional providers such as CISA (ADP).

    1. Record modifiedGitHub

      Show 24 original changes
      Individual changes of this event as published by NVD
      TypeActionBeforeAfter
      Referenceadded
      —
      https://github.com/xmldom/xmldom/commit/17678a2a73ecbd1a2da90f3d47dc23da9cef81aa
      Referenceadded
      —
      https://github.com/xmldom/xmldom/commit/291257493cb0eb6980eda83b162a9c4e6d7d2597
      Referenceadded
      —
      https://github.com/xmldom/xmldom/commit/2d6d6916ed8a4c223db1f6d7560ab4544c465b0f
      Referenceadded
      —
      https://github.com/xmldom/xmldom/commit/430357c7b6333108856e917bf2367afe5ceb6f8a
      Referenceadded
      —
      https://github.com/xmldom/xmldom/commit/4845ef109221df0890825de2822fbe77afba3afe
      Referenceadded
      —
      https://github.com/xmldom/xmldom/commit/8834218c85ac2a4d757b9587c9028e67c2f7b6c3
      Referenceadded
      —
      https://github.com/xmldom/xmldom/commit/8b7cfd1491314abdc347261921d7334ff15f7112
      Referenceadded
      —
      https://github.com/xmldom/xmldom/commit/b0620383abc1df067f3ce1014c43ae1bc1161eeb
      Referenceadded
      —
      https://github.com/xmldom/xmldom/commit/e6edcab6bef5bcdba0b220bb35442aa72f452b84
      Referenceadded
      —
      https://github.com/xmldom/xmldom/releases/tag/0.8.13
      Referenceadded
      —
      https://github.com/xmldom/xmldom/releases/tag/0.9.10
      Referenceadded
      —
      https://github.com/xmldom/xmldom/security/advisories/GHSA-2v35-w6hq-6mfw
      Referenceremoved
      https://github.com/xmldom/xmldom/commit/17678a2a73ecbd1a2da90f3d47dc23da9cef81aa
      —
      Referenceremoved
      https://github.com/xmldom/xmldom/commit/291257493cb0eb6980eda83b162a9c4e6d7d2597
      —
      Referenceremoved
      https://github.com/xmldom/xmldom/commit/2d6d6916ed8a4c223db1f6d7560ab4544c465b0f
      —
      Referenceremoved
      https://github.com/xmldom/xmldom/commit/430357c7b6333108856e917bf2367afe5ceb6f8a
      —
      Referenceremoved
      https://github.com/xmldom/xmldom/commit/4845ef109221df0890825de2822fbe77afba3afe
      —
      Referenceremoved
      https://github.com/xmldom/xmldom/commit/8834218c85ac2a4d757b9587c9028e67c2f7b6c3
      —
      Referenceremoved
      https://github.com/xmldom/xmldom/commit/8b7cfd1491314abdc347261921d7334ff15f7112
      —
      Referenceremoved
      https://github.com/xmldom/xmldom/commit/b0620383abc1df067f3ce1014c43ae1bc1161eeb
      —
      Referenceremoved
      https://github.com/xmldom/xmldom/commit/e6edcab6bef5bcdba0b220bb35442aa72f452b84
      —
      Referenceremoved
      https://github.com/xmldom/xmldom/releases/tag/0.8.13
      —
      Referenceremoved
      https://github.com/xmldom/xmldom/releases/tag/0.9.10
      —
      Referenceremoved
      https://github.com/xmldom/xmldom/security/advisories/GHSA-2v35-w6hq-6mfw
      —

      Source identifier: security-advisories@github.com

    2. Record modifiedCISA ADP

      Show 2 original changes
      Individual changes of this event as published by NVD
      TypeActionBeforeAfter
      Referenceadded
      —
      https://github.com/xmldom/xmldom/security/advisories/GHSA-2v35-w6hq-6mfw
      Referenceremoved
      https://github.com/xmldom/xmldom/security/advisories/GHSA-2v35-w6hq-6mfw
      —

      Source identifier: 134c704f-9b21-4f2e-91b3-4a467353bcc0

    3. Record modifiedRed Hat ADP

      Show 10 original changes
      Individual changes of this event as published by NVD
      TypeActionBeforeAfter
      Affected versions (publisher)added
      —
      Affected value modified. <a href="https://github.com/CVEProject/cvelistV5/blob/main/cves/2026/41xxx/CVE-2026-41673.json">CVE-2026-41673</a>
      Referenceadded
      —
      https://access.redhat.com/errata/RHSA-2026:26234
      Referenceadded
      —
      https://access.redhat.com/errata/RHSA-2026:60520
      Referenceadded
      —
      https://access.redhat.com/security/cve/CVE-2026-41673
      Referenceadded
      —
      https://bugzilla.redhat.com/show_bug.cgi?id=2467630
      Referenceadded
      —
      https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-41673.json
      Referenceremoved
      https://access.redhat.com/errata/RHSA-2026:26234
      —
      Referenceremoved
      https://access.redhat.com/security/cve/CVE-2026-41673
      —
      Referenceremoved
      https://bugzilla.redhat.com/show_bug.cgi?id=2467630
      —
      Referenceremoved
      https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-41673.json
      —

      Source identifier: 0b0ca135-0b70-47e7-9f44-1890c2a1c46c

    4. Record modifiedRed Hat ADP

      1 individual change: Affected versions (publisher)

      Show the original change
      Individual changes of this event as published by NVD
      TypeActionBeforeAfter
      Affected versions (publisher)changed
      Red Hat Developer Hub 1.9, Red Hat Build of Podman Desktop, Red Hat Fuse 7 (+4)
      Red Hat Developer Hub 1.9, Red Hat Build of Podman Desktop, Red Hat Fuse 7 (+4)

      Source identifier: 0b0ca135-0b70-47e7-9f44-1890c2a1c46c

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