HighCVE-2026-17615

    Resteasy-core: resteasy sourceprovider remote unauthenticated file read (CVE-2026-17615)

    Published Last modified Sources: Red Hat, BSI, HKCERT, CVE.org

    What is affected, what to do

    A flaw was found in RESTEasy's SourceProvider. This vulnerability allows an unauthenticated attacker to perform an unauthenticated remote file read.

    Update Red Hat Build of Apache Camel 3.33.3.SP1 to version 6.2.16.Final-redhat-00003, Red Hat build of Keycloak 26.6 to version 26.6.7-3, Red Hat build of Keycloak 26.6 to version 26.6-20.

    Affected
    • Red Hat Build of Apache Camel 3.33.3.SP1 lt *..6.2.16.Final-redhat-00003
    • Red Hat build of Keycloak 26.6 lt *..26.6.7-3
    • Red Hat build of Keycloak 26.6 lt *..26.6-20
    • Red Hat build of Quarkus 3.27.5.SP1 lt *..6.2.12.Final-redhat-00003
    • Red Hat build of Quarkus 3.33.3.SP1 lt *..6.2.16.Final-redhat-00003
    • Red Hat Enterprise Linux 9 lt *..0:3.0.26-20.el9_8
    • Red Hat Enterprise Linux 9.4 Update Services for SAP Solutions lt *..0:3.0.26-20.el9_4
    • Red Hat Enterprise Linux 9.6 Extended Update Support lt *..0:3.0.26-20.el9_6
    Fixed in
    • Red Hat Build of Apache Camel 3.33.3.SP1 6.2.16.Final-redhat-00003
    • Red Hat build of Keycloak 26.6 26.6.7-3
    • Red Hat build of Keycloak 26.6 26.6-20
    • Red Hat build of Quarkus 3.27.5.SP1 6.2.12.Final-redhat-00003
    • Red Hat build of Quarkus 3.33.3.SP1 6.2.16.Final-redhat-00003
    • Red Hat Enterprise Linux 9 0:3.0.26-20.el9_8
    • Red Hat Enterprise Linux 9.4 Update Services for SAP Solutions 0:3.0.26-20.el9_4
    • Red Hat Enterprise Linux 9.6 Extended Update Support 0:3.0.26-20.el9_6

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

    Metrics

    7.5

    Priority

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

    Source: NVD, CVSS v3

    7.5

    CVSS v3

    Severity High on the scale from 0 to 10.

    Source: Red Hat, BSI, HKCERT, CVE.org

    0.8 %

    EPSS score

    Low — model estimates < 1% exploitation likelihood.

    Source: FIRST EPSS, percentile 57.0

    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
    88.69 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
    7.5 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
    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
    0.8 %
    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
    57.0
    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
    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-611

    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 RESTEasy's SourceProvider. This vulnerability allows an unauthenticated attacker to perform an unauthenticated remote file read. By sending a specially crafted XML body with a DOCTYPE declaration referencing external entities to an endpoint that accepts application/xml and returns Source or StreamSource, the server can be tricked into resolving the entity and including sensitive file contents in the HTTP response. This is due to the SourceProvider.writeTo() method creating a SAXParser without disabling external entity resolution, leading to an XML External Entity (XXE) vulnerability.

    Source: redhat_csaf, BSI WID Portal, BSI CSAF, HKCERT (CC BY 3.0 HK) · HKCERT rating: medium, NVD (NIST), cvelistv5

    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
    Red HatRed Hat Build of Apache Camel 3.33.3.SP1
    • < 6.2.16.Final-redhat-00003
    • 6.2.16.Final-redhat-00003
    Red HatRed Hat build of Apache Camel 4 for Quarkus 3
    • —
    • —
    Red HatRed Hat build of Apicurio Registry 3
    • —
    • —
    Red HatRed Hat build of Debezium 3
    • —
    • —
    Red HatRed Hat build of Keycloak 26.6
    • < 26.6-20
    • < 26.6.7-3
    • 26.6-20
    • 26.6.7-3
    Red HatRed Hat build of Keycloak 26.6.7
    • —
    • —
    Red HatRed Hat build of Quarkus 3.27.5.SP1
    • < 6.2.12.Final-redhat-00003
    • 6.2.12.Final-redhat-00003
    Red HatRed Hat build of Quarkus 3.33.3.SP1
    • < 6.2.16.Final-redhat-00003
    • 6.2.16.Final-redhat-00003
    Red HatRed Hat Enterprise Linux 8
    • —
    • —
    Red HatRed Hat Enterprise Linux 9
    • < 0:3.0.26-20.el9_8
    • 0:3.0.26-20.el9_8
    Red HatRed Hat Enterprise Linux 9.4 Update Services for SAP Solutions
    • < 0:3.0.26-20.el9_4
    • 0:3.0.26-20.el9_4
    Red HatRed Hat Enterprise Linux 9.6 Extended Update Support
    • < 0:3.0.26-20.el9_6
    • 0:3.0.26-20.el9_6
    Red HatRed Hat Fuse 7
    • —
    • —
    Red HatRed Hat JBoss Enterprise Application Platform 8
    • —
    • —
    Red HatRed Hat JBoss Enterprise Application Platform Expansion Pack
    • —
    • —
    Red HatRed Hat Satellite 6
    • —
    • —
    IBMWebSphere Application Server Liberty
    • < 26.0.0.11
    • 26.0.0.11
    Red HatEnterprise Linux
    • resteasy
    • —

    Vendors and products

    Weakness classes (CWE)

    • CWE-611Improper Restriction of XML External Entity Reference

      Base

      The product processes an XML document that can contain XML entities with URIs that resolve to documents outside of the intended sphere of control, causing the product to embed incorrect documents into its output.

      Entry at MITRE CWE-611

    References & sources

    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 modifiedRed Hat

      1 individual change: Affected versions (publisher)

      Show the original change
      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/2026/17xxx/CVE-2026-17615.json">CVE-2026-17615</a>

      Source identifier: secalert@redhat.com

    2. Record modifiedRed Hat

      Show 2 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/2026/17xxx/CVE-2026-17615.json">CVE-2026-17615</a>
      Referenceadded
      —
      https://access.redhat.com/errata/RHSA-2026:80505

      Source identifier: secalert@redhat.com

    3. Record modifiedRed Hat

      1 individual change: Affected versions (publisher)

      Show the original change
      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/2026/17xxx/CVE-2026-17615.json">CVE-2026-17615</a>

      Source identifier: secalert@redhat.com

    4. Record modifiedRed Hat

      Show 2 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/2026/17xxx/CVE-2026-17615.json">CVE-2026-17615</a>
      Referenceadded
      —
      https://access.redhat.com/errata/RHSA-2026:77297

      Source identifier: secalert@redhat.com

    5. Record modifiedRed Hat

      1 individual change: Affected versions (publisher)

      Show the original change
      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/2026/17xxx/CVE-2026-17615.json">CVE-2026-17615</a>

      Source identifier: secalert@redhat.com

    Show 8 older changes

    1. Record modifiedRed Hat

      Show 2 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/2026/17xxx/CVE-2026-17615.json">CVE-2026-17615</a>
      Referenceadded
      —
      https://access.redhat.com/errata/RHSA-2026:72424

      Source identifier: secalert@redhat.com

    2. Record modifiedRed Hat

      1 individual change: Affected versions (publisher)

      Show the original change
      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/2026/17xxx/CVE-2026-17615.json">CVE-2026-17615</a>

      Source identifier: secalert@redhat.com

    3. Record modifiedRed Hat

      Show 3 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/2026/17xxx/CVE-2026-17615.json">CVE-2026-17615</a>
      Referenceadded
      —
      https://access.redhat.com/errata/RHSA-2026:68277
      Referenceadded
      —
      https://access.redhat.com/errata/RHSA-2026:68278

      Source identifier: secalert@redhat.com

    4. Record modifiedRed Hat

      Show 3 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/2026/17xxx/CVE-2026-17615.json">CVE-2026-17615</a>
      Referenceadded
      —
      https://access.redhat.com/errata/RHSA-2026:62515
      Referenceadded
      —
      https://access.redhat.com/errata/RHSA-2026:62555

      Source identifier: secalert@redhat.com

    5. Record modifiedRed Hat

      1 individual change: Affected versions (publisher)

      Show the original change
      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/2026/17xxx/CVE-2026-17615.json">CVE-2026-17615</a>

      Source identifier: secalert@redhat.com

    6. Record modifiedRed Hat

      Show 2 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/2026/17xxx/CVE-2026-17615.json">CVE-2026-17615</a>
      Referenceadded
      —
      https://access.redhat.com/errata/RHSA-2026:63302

      Source identifier: secalert@redhat.com

    7. Record modifiedCISA ADP

      CISA assessment (SSVC): exploitation: none known, automatable: yes

      Show the original change
      Individual changes of this event as published by NVD
      TypeActionBeforeAfter
      SSVC assessmentadded
      —
      {"id":"CVE-2026-17615","role":"CISA Coordinator","options":[{"exploitation":"none"},{"automatable":"yes"},{"technicalImpact":"partial"}],"version":"2.0.3","timestamp":"2026-08-31T17:09:02.820161Z"}

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

    8. ReceivedRed Hat

      CVSS V3.1: AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

      Weakness type: CWE-611

      Description added or changed

      Show 6 original changes
      Individual changes of this event as published by NVD
      TypeActionBeforeAfter
      Descriptionadded
      —
      A flaw was found in RESTEasy's SourceProvider. This vulnerability allows an unauthenticated attacker to perform an unauthenticated remote file read. By sending a specially crafted XML body with a DOCTYPE declaration referencing external entities to an endpoint that accepts application/xml and returns Source or StreamSource, the server can be tricked into resolving the entity and including sensitive file contents in the HTTP response. This is due to the SourceProvider.writeTo() method creating a SAXParser without disabling external entity resolution, leading to an XML External Entity (XXE) vulnerability.
      CVSSadded
      —
      AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
      Weakness type (CWE)added
      —
      CWE-611
      Affected versions (publisher)added
      —
      New affected value received. <a href="https://github.com/CVEProject/cvelistV5/blob/main/cves/2026/17xxx/CVE-2026-17615.json">CVE-2026-17615</a>
      Referenceadded
      —
      https://access.redhat.com/security/cve/CVE-2026-17615
      Referenceadded
      —
      https://bugzilla.redhat.com/show_bug.cgi?id=2507635

      Source identifier: secalert@redhat.com

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