Vulnerability-Lookup

RHSA-2026:72424

Vulnerability from csaf_redhat - Published: 2026-09-28 11:14 - Updated: 2026-10-02 04:51

Summary

Red Hat Security Advisory: resteasy security update

Severity

Important

Notes

Topic: An update for resteasy is now available for Red Hat Enterprise Linux 9. Red Hat Product Security has rated this update as having a security impact of Important. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available for each vulnerability from the CVE link(s) in the References section.

Details: RESTEasy contains a JBoss project that provides frameworks to help build RESTful Web Services and RESTful Java applications. It is a fully certified and portable implementation of the JAX-RS specification. Security Fix(es): * resteasy-core: RESTeasy SourceProvider remote unauthenticated file read (CVE-2026-17615) For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.

Terms of Use: This content is licensed under the Creative Commons Attribution 4.0 International License (https://creativecommons.org/licenses/by/4.0/). If you distribute this content, or a modified version of it, you must provide attribution to Red Hat Inc. and provide a link to the original.

CVE-2026-17615

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.

7.5 (High)


                
                  CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

CWE-611 - Improper Restriction of XML External Entity Reference

Affected products

Fixed 5 products

Product	Version	Remediation
Unresolved product id: AppStream-9.8.0.Z.MAIN.EUS:pki-resteasy-client-0:3.0.26-20.el9_8.noarch	—	Vendor Fix fix Workaround
Unresolved product id: AppStream-9.8.0.Z.MAIN.EUS:pki-resteasy-core-0:3.0.26-20.el9_8.noarch	—	Vendor Fix fix Workaround
Unresolved product id: AppStream-9.8.0.Z.MAIN.EUS:pki-resteasy-jackson2-provider-0:3.0.26-20.el9_8.noarch	—	Vendor Fix fix Workaround
Unresolved product id: AppStream-9.8.0.Z.MAIN.EUS:pki-resteasy-servlet-initializer-0:3.0.26-20.el9_8.noarch	—	Vendor Fix fix Workaround
Unresolved product id: AppStream-9.8.0.Z.MAIN.EUS:resteasy-0:3.0.26-20.el9_8.src	—	Vendor Fix fix Workaround

Threats

Impact Important

References

8 references

URL	Category
https://access.redhat.com/errata/RHSA-2026:72424	self
https://access.redhat.com/security/updates/classi…	external
https://bugzilla.redhat.com/show_bug.cgi?id=2507635	external
https://security.access.redhat.com/data/csaf/v2/a…	self
https://access.redhat.com/security/cve/CVE-2026-17615	self
https://bugzilla.redhat.com/show_bug.cgi?id=2507635	external
https://www.cve.org/CVERecord?id=CVE-2026-17615	external
https://nvd.nist.gov/vuln/detail/CVE-2026-17615	external

Acknowledgments

Leon Zlobecki

JSON

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            "availabilityImpact": "NONE",
            "baseScore": 7.5,
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            "confidentialityImpact": "HIGH",
            "integrityImpact": "NONE",
            "privilegesRequired": "NONE",
            "scope": "UNCHANGED",
            "userInteraction": "NONE",
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            "version": "3.1"
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}

CVE-2026-17615 (GCVE-0-2026-17615)

Vulnerability from cvelistv5 – Published: 2026-08-31 16:15 – Updated: 2026-10-02 04:32

Title

Resteasy-core: resteasy sourceprovider remote unauthenticated file read

Summary

Severity

7.5 (High)


                        
                          CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

SSVC

Exploitation: none Automatable: yes Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-08-31 17:09 UTC

CWE

CWE-611 - Improper Restriction of XML External Entity Reference

Assigner

redhat redhat root Scorecard

References

8 references

URL	Tags
https://access.redhat.com/errata/RHSA-2026:62515	vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:62555	vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:63302	vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:68277	vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:68278	vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:72424	vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/security/cve/CVE-2026-17615	vdb-entryx_refsource_REDHAT
https://bugzilla.redhat.com/show_bug.cgi?id=2507635	issue-trackingx_refsource_REDHAT

Impacted products

12 products

Vendor	Product	Version
Red Hat	Red Hat build of Keycloak 26.6	Unaffected: 26.6.7-3 , < * (rpm) cpe:/a:redhat:build_keycloak:26.6::el9
Red Hat	Red Hat build of Keycloak 26.6	Unaffected: 26.6-20 , < * (rpm) cpe:/a:redhat:build_keycloak:26.6::el9
Red Hat	Red Hat build of Keycloak 26.6.7	cpe:/a:redhat:build_keycloak:26.6::el9
Red Hat	Red Hat Enterprise Linux 9	Unaffected: 0:3.0.26-20.el9_8 , < * (rpm) cpe:/a:redhat:enterprise_linux:9::appstream
Red Hat	Red Hat build of Apache Camel 4 for Quarkus 3	cpe:/a:redhat:camel_quarkus:3
Red Hat	Red Hat build of Apicurio Registry 3	cpe:/a:redhat:apicurio_registry:3
Red Hat	Red Hat build of Debezium 3	cpe:/a:redhat:debezium:3
Red Hat	Red Hat Enterprise Linux 8	cpe:/o:redhat:enterprise_linux:8
Red Hat	Red Hat Fuse 7	cpe:/a:redhat:jboss_fuse:7
Red Hat	Red Hat JBoss Enterprise Application Platform 8	cpe:/a:redhat:jboss_enterprise_application_platform:8
Red Hat	Red Hat JBoss Enterprise Application Platform Expansion Pack	cpe:/a:redhat:jbosseapxp
Red Hat	Red Hat Satellite 6	cpe:/a:redhat:satellite:6

Date Public

2026-08-31 00:00

Credits

Red Hat would like to thank Leon Zlobecki for reporting this issue.

Show details on NVD website

JSON

To clipboard

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Sightings

Author	Source	Type	Date	Other

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.

Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.

Action not permitted

RHSA-2026:72424

CVE-2026-17615 (GCVE-0-2026-17615)

Tags

Sightings

Nomenclature

Related by attack behaviour