CVE-2026-50629 Apache CXF: OAuth2: Log Injection via Unsanitized Client Identifier
Attackers can inject arbitrary content into Apache CXF OAuth2 server logs via the unsanitized clientId parameter, potentially corrupting audit trails.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-50629?
CVE-2026-50629 is a medium-severity vulnerability in Apache Cxf, published on 12 Jun 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
The 'clientId' parameter from incoming HTTP requests is directly concatenated into OAuth2 server log warning messages without sanitizing control characters. This allows an attacker to inject arbitrary content, including fake log entries, into the server's log files. Users are recommended to upgrade to versions 4.2.2 or 4.1.7 or 3.6.12, which fixes this issue.
Weakness: CWE-93
Which versions are affected by CVE-2026-50629?
4 open source packages ship an affected version, including org.apache.cxf:cxf-rt-rs-security-oauth2. It affects 1 product.
| Package | Affected | Fixed in |
|---|---|---|
org.apache.cxf:cxf-rt-rs-security-oauth2 Maven | All versions | 4.1.7 |
org.apache.cxf:cxf-rt-rs-security-oauth2 Maven | All versions | 4.1.7 |
org.apache.cxf:cxf-rt-rs-security-oauth2 Maven | From 4.2.0 | 4.2.2 |
org.apache.cxf:cxf-rt-rs-security-oauth2 Maven | From 4.2.0 | 4.2.2 |
Products include Apache Cxf.
How do I fix CVE-2026-50629?
Upgrade org.apache.cxf:cxf-rt-rs-security-oauth2 to a fixed version for your release line: 4.1.7 or 4.2.2.
Is CVE-2026-50629 being exploited?
There is no known exploitation of CVE-2026-50629 in the wild and no public exploit code.
Other vulnerabilities in Apache Cxf
- CVE-2012-2379 XML Signature/Encryption Not Validated in Apache CXF
- CVE-2026-66909 Apache CXF: Unsafe deserialization of inbound JMS ObjectMessage
- CVE-2026-68079 Apache CXF: DefaultEncryptingCodeDataProvider allows unlimited authorization code replay
- CVE-2026-50628 Apache CXF: OAuth2: Inverted IP Binding Check Defeats Security Control
- CVE-2025-48913 Apache CXF: Untrusted JMS configuration can lead to RCE
Sources
Also known as GHSA-f8p7-h97q-7vx7.