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CVE Record

CVE-2026-50628: Apache CXF: OAuth2: Inverted IP Binding Check Defeats Security Control

A logic error in OAuthRequestFilter rejects legitimate requests originating from the bound IP address, while blindly allowing requests from any other IP address. Enabling this security feature inadvertently creates an inverse security check. Users are recommended to upgrade to versions 4.2.2 or 4.1.7, which fixes this issue.

CriticalCVSS 9.8Not KEV-listedUpdated
Glexia's TakeAutomated analysis

Security readout for executives and security teams

Apache CXF shipped an OAuth2 IP-binding feature that does the opposite of what it promises: it blocks the trusted IP and lets every other IP through. Organizations that enabled this protection thinking it hardened their APIs actually widened access. Upgrading to Apache CXF 4.2.2 or 4.1.7 corrects the check. Exposure is limited to deployments running Apache CXF 4.2.0–4.2.1 or 4.1.x prior to 4.1.7 that explicitly enable the OAuth2 IP-binding feature in OAuthRequestFilter. Public-facing OAuth2-protected APIs built on cxf-rt-rs-security-oauth2 are the highest concern, especially where operators believed IP binding was an active safeguard. Treat as high urgency for any team running Apache CXF OAuth2 with IP binding enabled: patch within the next change window and reconfirm compensating controls. If the feature is not used, prioritize on the normal patch cadence but do not enable IP binding until upgraded. Mitigation focus: Upgrade Apache CXF to 4.2.2 or 4.1.7 per the vendor advisory.; Apply Red Hat RHSA-2026:37390 updates on affected Red Hat products.; If patching is delayed, disable the OAuth2 IP-binding option rather than rely on it..

Prepared

Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.

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-20: Exact CWE lookup

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cwe · low confidence lookup

CWE-358: Exact CWE lookup

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cve · low confidence lookup

CVE-2026-50628 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
Critical
CVSS
9.8 (3.1)
Known Exploited
No
Published

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

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.

2CVSS vectors
5Timeline events
3ADP providers
6Source links

SSVC decision data

CISA-ADPCISA Coordinator
Timestamp
Version
2.0.3
Exploitation: noneAutomatable: yesTechnical Impact: total

CVSS vector scores

2 official scores

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
9.8CVSS 3.1CriticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H3.95.9CISA-ADP
7.4CVSS 3.1HighCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N2.25.2redhat-SADP

Vulnerability scoring details

Base CVSS 3.1 score

9.8Critical
CVSS 3.1 vector shape for CVE-2026-50628Attack VectorAttack ComplexityPrivileges RequiredUser InteractionScopeConfidentiality ImpactIntegrity ImpactAvailability Impact

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

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. CVE reservedCVE Program

    The CVE ID was reserved by the assigning CNA.

  2. ADP timelineredhat-SADP

    Made public.

  3. CVE publishedCVE Program

    The CVE record was published.

  4. ADP timelineredhat-SADP

    Reported to Red Hat.

  5. CVE updatedCVE Program

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

ADP provider summaries

CVECVE Program Container
CISA-ADPCISA ADP Vulnrichment
cvssV3_1other:ssvc
redhat-SADPcxf: org.apache.cxf/cxf-rt-rs-security-oauth2: cxf: Unauthorized access due to logic error in OAuthRequestFilter
other:Red Hat severity ratingcvssV3_1
  • 2026-06-12T10:01:04.467Z: Reported to Red Hat.
  • 2026-06-12T08:56:28.526Z: Made public.

Source materials

Affected products

Products and packages named in the record

VendorProductVersion / packageStatus
Apache Software FoundationApache CXForg.apache.cxf:cxf-rt-rs-security-oauth2, 4.2.0, 0unaffected
Weakness

CWE details

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

CWE-20 · source CWE mapping

Improper Input Validation

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

CWE-358 · source CWE mapping

Improperly Implemented Security Check for Standard

Improperly Implemented Security Check for Standard represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.