A CRLF injection vulnerability exists in the OAuth2 AuthorizationUtils class. (CVE-2026-50630)
A CRLF injection vulnerability exists in the OAuth2 AuthorizationUtils class where the 'realm' parameter in the WWW-Authenticate response header is not sanitized for carriage return and line feed characters. This allows an attacker controlling the realm value to inject arbitrary HTTP headers or split the HTTP response. Versions 4.2.2 and 4.1.7 include fixes for this issue.
AI Analysis
Technical Summary
The OAuth2 AuthorizationUtils class improperly concatenates the 'realm' parameter into the WWW-Authenticate response header without sanitizing CR and LF characters. This CRLF injection vulnerability (CWE-113) can be exploited by an attacker who controls the realm value to inject arbitrary HTTP headers or split the HTTP response, potentially leading to HTTP response splitting attacks. The vulnerability is tracked as CVE-2026-50630 with a CVSS 3.1 base score of 6.5 (medium severity). Fixed versions are 4.2.2 and 4.1.7.
Potential Impact
An attacker able to control the 'realm' parameter can inject arbitrary HTTP headers or split the HTTP response. This may allow HTTP response splitting attacks, which can lead to web cache poisoning, cross-site scripting, or other client-side attacks. The confidentiality and integrity impact is limited (low), with no availability impact.
Mitigation Recommendations
Users are recommended to upgrade to versions 4.2.2 or 4.1.7 where this vulnerability is fixed. No other mitigation or temporary workaround is indicated. Patch status is confirmed by the vendor advisory.
A CRLF injection vulnerability exists in the OAuth2 AuthorizationUtils class. (CVE-2026-50630)
Description
A CRLF injection vulnerability exists in the OAuth2 AuthorizationUtils class where the 'realm' parameter in the WWW-Authenticate response header is not sanitized for carriage return and line feed characters. This allows an attacker controlling the realm value to inject arbitrary HTTP headers or split the HTTP response. Versions 4.2.2 and 4.1.7 include fixes for this issue.
CVSS v3.1
Score 6.5medium
Affected software
pkg:maven/org.apache.oltu/oauth2Run on your own infrastructure? Check whether these packages are installed with threat-finder — our free open-source scanner.
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
The OAuth2 AuthorizationUtils class improperly concatenates the 'realm' parameter into the WWW-Authenticate response header without sanitizing CR and LF characters. This CRLF injection vulnerability (CWE-113) can be exploited by an attacker who controls the realm value to inject arbitrary HTTP headers or split the HTTP response, potentially leading to HTTP response splitting attacks. The vulnerability is tracked as CVE-2026-50630 with a CVSS 3.1 base score of 6.5 (medium severity). Fixed versions are 4.2.2 and 4.1.7.
Potential Impact
An attacker able to control the 'realm' parameter can inject arbitrary HTTP headers or split the HTTP response. This may allow HTTP response splitting attacks, which can lead to web cache poisoning, cross-site scripting, or other client-side attacks. The confidentiality and integrity impact is limited (low), with no availability impact.
Mitigation Recommendations
Users are recommended to upgrade to versions 4.2.2 or 4.1.7 where this vulnerability is fixed. No other mitigation or temporary workaround is indicated. Patch status is confirmed by the vendor advisory.
Technical Details
- Gcve Source
- db.gcve.eu
- Osv Id
- GHSA-xf62-wr5p-5p95
- Osv Schema Version
- 1.4.0
- Aliases
- ["CVE-2026-50630"]
- Ecosystems
- []
- Database Specific Severity
- MODERATE
- Cvss Version
- 3.1
Threat ID: 6a77433fbf8831d539b4785a
Added to database: 08/08/2026, 14:54:55 UTC
Last enriched: 08/08/2026, 15:43:41 UTC
Last updated: 08/09/2026, 02:06:30 UTC
Views: 8
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