CVE-2026-61466

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 v3 9.1 CRITICAL

9.1^/10

CVSS v3 : CRITICAL

Vector :

Exploitability : 3.9 / Impact : 5.2

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact NONE

Availability Impact HIGH

Scope UNCHANGED

References

Link	Resource
https://lists.apache.org/thread/2l1r16g79tpxd7fzrzr2q9oscwrjgljs	Mailing List Vendor Advisory
http://www.openwall.com/lists/oss-security/2026/08/06/21

Configurations

Configuration 1 (hide)

OR	cpe:2.3:a:apache:cxf::::::::
	cpe:2.3:a:apache:cxf::::::::
	cpe:2.3:a:apache:cxf::::::::

History

No history.

Information

Published : 2026-08-06 12:16

Updated : 2026-08-07 00:16

NVD link : CVE-2026-61466

Mitre link : CVE-2026-61466

CVE.ORG link : CVE-2026-61466

JSON object : View

Products Affected

apache

cxf

CWE

CWE-304

Missing Critical Step in Authentication

{"id": "CVE-2026-61466", "cveTags": [], "metrics": {"ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-61466", "role": "CISA Coordinator", "options": [{"exploitation": "none"}, {"automatable": "yes"}, {"technicalImpact": "partial"}], "version": "2.0.3", "timestamp": "2026-08-06T15:19:01.154800Z"}}], "cvssMetricV31": [{"type": "Secondary", "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "cvssData": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 9.1, "attackVector": "NETWORK", "baseSeverity": "CRITICAL", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H", "integrityImpact": "NONE", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "HIGH", "privilegesRequired": "NONE", "confidentialityImpact": "HIGH"}, "impactScore": 5.2, "exploitabilityScore": 3.9}]}, "affected": [{"source": "security@apache.org", "affectedData": [{"vendor": "Apache Software Foundation", "product": "Apache CXF", "versions": [{"status": "affected", "version": "0", "lessThan": "3.6.12", "versionType": "semver"}, {"status": "affected", "version": "4.0.0", "lessThan": "4.1.8", "versionType": "semver"}, {"status": "affected", "version": "4.2.0", "lessThan": "4.2.3", "versionType": "semver"}], "packageName": "org.apache.cxf:cxf-rt-rs-security-oauth2", "collectionURL": "https://repo.maven.apache.org/maven2", "defaultStatus": "unaffected"}]}], "published": "2026-08-06T12:16:27.730", "references": [{"url": "https://lists.apache.org/thread/2l1r16g79tpxd7fzrzr2q9oscwrjgljs", "tags": ["Mailing List", "Vendor Advisory"], "source": "security@apache.org"}, {"url": "http://www.openwall.com/lists/oss-security/2026/08/06/21", "source": "af854a3a-2127-422b-91ae-364da2661108"}], "vulnStatus": "Modified", "weaknesses": [{"type": "Secondary", "source": "security@apache.org", "description": [{"lang": "en", "value": "CWE-304"}]}], "descriptions": [{"lang": "en", "value": "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."}], "lastModified": "2026-08-07T00:16:34.070", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:a:apache:cxf:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "09753EF1-BB56-4238-8ED7-609E2AB5EB05", "versionEndExcluding": "3.6.12"}, {"criteria": "cpe:2.3:a:apache:cxf:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "801F031C-B5F5-4CF5-B9A5-DD9AA2F76A66", "versionEndExcluding": "4.1.8", "versionStartIncluding": "4.0.0"}, {"criteria": "cpe:2.3:a:apache:cxf:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "A112761E-E622-4AE5-9BE6-47A247021D4F", "versionEndExcluding": "4.2.3", "versionStartIncluding": "4.2.0"}], "operator": "OR"}]}], "sourceIdentifier": "security@apache.org"}