CVE-2026-61466Suited to automated attack · CISA

Apache CXF: OAuth2 Dynamic Client Registration Scope Self-Escalation

CVSS score

9.1

EPSS probability

%0.7

Risk score

0.1

Published

2 mo ago

Overview Public Exploits (0)Newsroom Vulnerability Timeline

Patch status has not yet been verified

Resmî kaynaklarda yeterli kanıt bulunamadı. Bu sonuç “yama yok” anlamına gelmez.

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Vulnerability description

CVE AI research

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DayBreach AI Explanation

Verified against sources

Apache CXF OAuth2 Dynamic Client Registration Scope Self-Escalation Vulnerability

Sources read

Source agreement

Tam uyum

Evidence confidence

%61

Short explanation

Apache CXF's OAuth2 Dynamic Client Registration endpoint allows clients to self-assign privileged scopes without validation. No active exploitation is reported. Patch status is UNKNOWN. Affected versions are 0 < 3.6.12, 4.0.0 < 4.1.8, and 4.2.0 < 4.2.3.

Why does it matter?

This vulnerability allows privilege escalation during client registration, potentially enabling unauthorized access to sensitive resources. No active exploitation is confirmed. Patch status is UNKNOWN; users must upgrade to fixed versions to mitigate risk.

What should be done?

Upgrade to Apache CXF 3.6.12, 4.1.8, or 4.2.3 to mitigate the vulnerability.

Note on uncertainty

The sources give limited detail on some technical conditions. Review the chain of evidence below before deciding how to act.

Chain of evidence and sources3 verified claims

Apache CXF'nin OAuth2 Dynamic Client Registration uç noktası, `scope` değerini doğrulama olmadan kabul eder ve kayıt sırasında kullanıcıların önceden tanımlı yetkileri atamasına izin verir.

S0 · daybreach-canonical

Etkilenen sürümler 0 < 3.6.12, 4.0.0 < 4.1.8 ve 4.2.0 < 4.2.3 arasındadır; kullanıcılar bu düzeltmeleri içeren sürümlere yükseltilmelidir.

S0 · daybreach-canonical

Public exploit veya aktif istismar raporlanmadı. Yama durumu BİLİNMEYEN; güvenilir kanıt, düzeltme veya çözüme dair bir bulguya sahip değildir.

S0 · daybreach-canonical S1 · cvelist

Show the technical text from the sources

In Apache CXF's OAuth2 Dynamic Client Registration endpoint, the authorization server accepts and stores the `scope` value supplied in the client registration request verbatim, without validating it against an AS-defined allowlist. This could lead to a client self-assigning privileged scopes at registration time. Users are recommended to upgrade to versions 4.2.3 or 4.1.8 or 3.6.12, which fix this issue.

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

CWE: CWE-304

Explanation produced with the local qwen3:4b-instruct model. Numerical metrics and the KEV, patch and exploit statuses are not determined by AI.

IMPACT: Affected Products and Software

Affected Products

The following products are affected by CVE-2026-61466 vulnerability. Where our threat engine knows the exact affected versions, they are listed below.

ID	VENDOR	PRODUCT	ACTION
1	Apache Software Foundation	Apache CXF	View
2	apache	cxf	View
3	apache	cxf	View
4	apache	cxf	View

Total affected vendors: 2|Products: 4

RED HAT CSAF/VEX: Product Impact Check

Red Hat has not yet published a CSAF/VEX impact record for this CVE. This does not mean “not affected”.

SCORING: CVSS from Multiple Sources

CVSS Scores

The Common Vulnerability Scoring System is a standardised framework for assessing the severity of vulnerabilities in software and systems. We collect and display CVSS scores from several sources for each CVE.

SCORE	VERSION	SEVERITY	VECTOR	SOURCE
9.1	CVSS V3_1	CRITICAL	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H	CVE ADP
9.1	CVSS V31	CRITICAL	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H	NVD

Patch and Remediation Guide

Solution & Remediation Advisory

Patch status unknown

İncelenen resmî kaynaklarda yama durumu doğrulanamadı. Bu sonuç “yama yok” anlamına gelmez.

Confirm the affected product and version against the source evidence above.

Restrict access to internet-facing services and apply network segmentation.

Until a patch is confirmed, follow the vendor advisory; do not read an unknown status as “no patch”.

Monitor server logs and network endpoints for signs of anomalous execution.

Public exploit and active exploitation status

Verified exploit intelligence

No verified public PoC, exploit repository or Metasploit module has been found for this CVE yet.

Weakness Classification and Attack Patterns (CWE & CAPEC)

CWE - Common Weakness Enumeration

While CVE identifies specific instances of vulnerabilities, CWE categorises the common flaws or weaknesses that can lead to vulnerabilities. CVE-2026-61466 is associated with the following CWEs:

CWE-304: Common Weakness Enumeration Entry CWE-304

Common Attack Pattern Enumeration and Classification (CAPEC)

Common Attack Pattern Enumeration and Classification (CAPEC) stores attack patterns, which are descriptions of the common attributes and approaches employed by adversaries to exploit the CVE-2026-61466 weaknesses.

CAPEC-66: SQL Injection CAPEC-126: Path Traversal CAPEC-28: OS Command Injection

Attack Vector and Accessibility

ExposureAğ üzerinden

PermissionsGerekmiyor

UserGerekmiyor

Official Sources and Advisories

https://lists.apache.org/thread/2l1r16g79tpxd7fzrzr2q9oscwrjgljsvendor-advisory http://www.openwall.com/lists/oss-security/2026/08/06/21nvd

CVSS Vector Radar Chart

9.1 / 10

Vulnerability Scoring Details

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

Attack VectorNetwork

Attack ComplexityLow

Privileges RequiredNone required

User InteractionNone required

Confidentiality (Gizlilik)Low

Integrity (Bütünlük)None

Availability (Erişilebilirlik)High

Yama durumu bilinmiyor

İncelenen resmî kaynaklarda yama durumu doğrulanamadı. Bu sonuç “yama yok” anlamına gelmez.

Follow the vendor

Apache Software Foundation

apache

Weakness Type (CWE & CAPEC)

CWE-304

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