CVE Tools
Sign in

CVE-2026-61466

Apache CXF: OAuth2 Dynamic Client Registration Scope Self-Escalation

Published: Aug 6, 2026Updated: Aug 7, 2026 Sources: CVE List NVDCWE-304
9.1CRITICAL
NVD MITRE
EPSS Score
0.4%
Top 63.8%
CISA KEV
Not in KEV
Exploits
No Known Exploits
Remediation
Patch Available
Self-Check
Not available

Description

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.

No summary for this CVE yet.

CVSS Vector Breakdown

AV:NAC:LPR:NUI:NS:UC:HI:NA:H
Exploitability
AV:NAttack Vector
Network
AC:LAttack Complexity
Low
PR:NPrivileges Required
None
UI:NUser Interaction
None
Scope
S:UScope
Unchanged
Impact
C:HConfidentiality
High
I:NIntegrity
None
A:HAvailability
High
Open in CVSS calculator →

Weaknesses

CWE-304

Affected Products

Apache Software Foundation
oss-project·USaka apache foundation
Apache CXFLibrary
OSS Libraries / generic-library
apache
oss-project·USaka apache http server, apache httpd
cxfLibraryLibrary
OSS Libraries / generic-library

Exploitability

Official Patch Available
Is your org exposed to CVE-2026-61466?We can run the check for you — a free external exposure review, no install. Check my exposure

References

https://lists.apache.org/thread/2l1r16g79tpxd7fzrzr2q9oscwrjgljs
lists.apache.org
http://www.openwall.com/lists/oss-security/2026/08/06/21
openwall.com

Unlock Complete Vulnerability Intelligence

Get the full picture for CVE-2026-61466 and every CVE in our database. Create a free account — no credit card required.

Create Free Account
Plain-language analysis
Impact assessment and exploitation scenario in plain English
Attack graph visualization
Interactive attack path and kill chain mapping
Exploit details & PoC links
ExploitDB, Metasploit, GitHub PoCs with direct links
Nuclei scanner templates
Ready-to-use vulnerability scanner templates
Full remediation guide
Patch instructions, workarounds, and compliance impact
Interactive AI chat
Ask questions about this vulnerability in natural language
Related vulnerabilities
Semantically similar CVEs and attack patterns
REST API & MCP access
Integrate vulnerability data into your workflows