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CVE Record

CVE-2026-89058: Resteasy-core: resteasy: corsfilter reflects arbitrary origin with credentials under wildcard config

A flaw was found in RESTEasy's CorsFilter, which, when configured to allow all origins ("*"), reflects the request's Origin header back in the Access-Control-Allow-Origin response together with Access-Control-Allow-Credentials: true. This permissive cross-origin policy allows a malicious website to make credentialed cross-origin requests and read authenticated responses from a victim's session, resulting in a loss of confidentiality.

HighCVSS 7.4Not KEV-listedUpdated
Potential ATT&CK relevance

Conservative CVE-to-ATT&CK context

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ATT&CK lookup starting points

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cwe · low confidence lookup

CWE-346: Exact CWE lookup

Use the exact CWE identifier as the starting point before reviewing related ATT&CK behavior. Open the exact CWE lookup page first, then review the ATT&CK searches from that MITRE weakness context. This is a Glexia lookup hint, not an official ATT&CK mapping.

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cwe · low confidence lookup

CWE-942: Exact CWE lookup

Use the exact CWE identifier as the starting point before reviewing related ATT&CK behavior. Open the exact CWE lookup page first, then review the ATT&CK searches from that MITRE weakness context. This is a Glexia lookup hint, not an official ATT&CK mapping.

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cve · low confidence lookup

CVE-2026-89058 mapping review

Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.

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Vulnerability profileCVE Program record
Severity
High
CVSS
7.4 (3.1)
Known Exploited
No
Published

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

Official CVE source material

CNA and ADP enrichment extracted from CVE v5

These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.

1CVSS vectors
5Timeline events
1ADP providers
5Source links

SSVC decision data

CISA-ADPCISA Coordinator
Timestamp
Version
2.0.3
Exploitation: pocAutomatable: noTechnical Impact: partial

CVSS vector scores

1 official score

We collect every scored CVSS vector available in the official CNA and ADP containers. When more than one version is present, the table keeps the source vectors side by side instead of collapsing them into the highest score.

ScoreVersionSeverityVectorExploitImpactSource
7.4CVSS 3.1HighCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:N/A:N2.84redhat

Vulnerability scoring details

Base CVSS 3.1 score

7.4High
CVSS 3.1 vector shape for CVE-2026-89058Attack VectorAttack ComplexityPrivileges RequiredUser InteractionScopeConfidentiality ImpactIntegrity ImpactAvailability Impact

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

Attack Vector
NetworkAdjacentLocalPhysical
Attack Complexity
LowHigh
Privileges Required
NoneLowHigh
User Interaction
NoneRequired
Scope
ChangedUnchanged
Confidentiality Impact
HighLowNone
Integrity Impact
HighLowNone
Availability Impact
HighLowNone

Vulnerability timeline

Timeline events are normalized from CVE metadata, CNA source timelines, ADP timelines, and KEV metadata when present.

  1. Source timelineredhat

    Reported to Red Hat.

  2. CVE reservedCVE Program

    The CVE ID was reserved by the assigning CNA.

  3. Source timelineredhat

    Made public.

  4. CVE publishedCVE Program

    The CVE record was published.

  5. CVE updatedCVE Program

    The CVE record metadata indicates this as the latest update time.

ADP provider summaries

CISA-ADPCISA ADP Vulnrichment
other:ssvc

Source materials

Affected products

Products and packages named in the record

VendorProductVersion / packageStatus
Red HatRESTEasyRESTEasy, 0, 7.0.0.Alpha1unaffected
Red HatRed Hat build of Apache Camel 4 for Quarkus 3resteasy-coreaffected
Red HatRed Hat build of Apicurio Registry 3resteasy-coreaffected
Red HatRed Hat build of Debezium 3resteasy-coreaffected
Red HatRed Hat Build of Keycloakresteasy-coreaffected
Red HatRed Hat Build of Keycloakrhbk/keycloak-rhel9-operatoraffected
Red HatRed Hat build of Quarkusresteasy-coreaffected
Red HatRed Hat Certificate System 10redhat-pki:10/redhat-pkiaffected
Red HatRed Hat Certificate System 11redhat-pkiaffected
Red HatRed Hat Enterprise Linux 10dogtag-pkiunaffected
Red HatRed Hat Enterprise Linux 8pki-core:10.6/pki-coreunaffected
Red HatRed Hat Enterprise Linux 9jackson-jaxrs-providersunaffected
Red HatRed Hat Enterprise Linux 9pki-coreunaffected
Red HatRed Hat Enterprise Linux 9resteasyaffected
Red HatRed Hat Fuse 7resteasy-coreaffected
Red HatRed Hat Fuse 7resteasy-jaxrsaffected
Red HatRed Hat JBoss Enterprise Application Platform 7jboss-eap-7/eap74-els-openjdk11-openshift-rhel8affected
Red HatRed Hat JBoss Enterprise Application Platform 7jboss-eap-7/eap74-els-openjdk17-openshift-rhel8affected
Red HatRed Hat JBoss Enterprise Application Platform 7jboss-eap-7/eap74-els-openjdk8-openshift-rhel8affected
Red HatRed Hat JBoss Enterprise Application Platform 7resteasy-jaxrsaffected
Red HatRed Hat JBoss Enterprise Application Platform 8resteasy-coreaffected
Red HatRed Hat JBoss Enterprise Application Platform Expansion Packresteasy-coreaffected
Red HatRed Hat Satellite 6candlepinunaffected
Red HatRed Hat Single Sign-On 7resteasy-jaxrsaffected
Weakness

CWE details

CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.

CWE-346 · source CWE mapping

Origin Validation Error

Origin Validation Error represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.

CWE-942 · source CWE mapping

Permissive Cross-domain Security Policy with Untrusted Domains

Permissive Cross-domain Security Policy with Untrusted Domains represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.