CVE-2026-73117 Details
Description
Improper Neutralization of CRLF Sequences in HTTP Headers ('HTTP Response Splitting') vulnerability in Apache Juneau. The Apache Juneau REST server passed response header values and redirect targets to the servlet container unchecked. An application that sets a response header or redirect target from request data could let a remote client inject header lines (where the servlet container does not itself reject CR/LF) or redirect users to an arbitrary external site. The framework itself does not build headers or redirects from request data; exposure depends on application code. This issue affects Apache Juneau: through 9.2.0. Users are recommended to upgrade to version 9.2.1, which fixes the issue. Header values are now sanitized by default; applications that build redirect targets from request data must also switch from sendRedirect() to the new sendSafeRedirect().
A CRLF injection vulnerability has been identified in the Apache Juneau REST server, all versions through 9.2.0. This vulnerability allows for HTTP response splitting by injecting header lines or redirecting users to arbitrary external sites. The issue arises because the server passes response header values and redirect targets to the servlet container without proper validation. Applications that set these values from request data could inadvertently expose users to these risks. The vulnerability depends on application code that utilizes request-derived data for headers or redirects.
Users are advised to upgrade to Apache Juneau version 9.2.1, which addresses this vulnerability by default. Applications that build redirect targets from request data must also switch from the standard sendRedirect() method to the new sendSafeRedirect() method, which is available in version 9.2.1.
Metrics
CVSS 4.0 Severity and Vector Strings:
VolerionCVSS 3.x Severity and Vector Strings:
No data available for CVSS Version 2.0 on this CVE.
Volerion
Assessed Nov 5, 2026References to Advisories, Solutions, and Tools
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| URL | Source(s) | Tag(s) |
|---|---|---|
| https://lists.apache.org/thread.html/j05q7vw08j48o96tdlzcsd4sozx1lyl6 | [email protected] | AdvisoryBundleMailing ListRemedyVendor |
Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| CWE-113 | Improper Neutralization of CRLF Sequences in HTTP Headers ('HTTP Request/Response Splitting') | [email protected] |
Affected Products
| Product | Versions |
|---|---|
| Apache Juneau | <= 9.2.0 (semver) |
CPE
Remediation
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Change History
1 change record found show changes
| Date | Action | Recorded By |
|---|---|---|
| Nov 5, 2026 | New CVE Received | [email protected] |