Upstream information
Description
Rack is a modular Ruby web server interface. From versions 3.0.0.beta1 to before 3.1.21, and 3.2.0 to before 3.2.6, Rack::Request parses the Host header using an AUTHORITY regular expression that accepts characters not permitted in RFC-compliant hostnames, including /, ?, #, and @. Because req.host returns the full parsed value, applications that validate hosts using naive prefix or suffix checks can be bypassed. This can lead to host header poisoning in applications that use req.host, req.url, or req.base_url for link generation, redirects, or origin validation. This issue has been patched in versions 3.1.21 and 3.2.6.SUSE information
Overall state of this security issue: Pending
This issue is currently rated as having moderate severity.
| CVSS detail | CNA (GitHub) | SUSE |
|---|---|---|
| Base Score | 4.8 | 4.8 |
| Vector | CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N | CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N |
| Attack Vector | Network | Network |
| Attack Complexity | High | High |
| Privileges Required | None | None |
| User Interaction | None | None |
| Scope | Unchanged | Unchanged |
| Confidentiality Impact | Low | Low |
| Integrity Impact | Low | Low |
| Availability Impact | None | None |
| CVSSv3 Version | 3.1 | 3.1 |
| CVSS detail | SUSE |
|---|---|
| Base Score | 6.3 |
| Vector | CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N |
| Attack Vector | Network |
| Attack Complexity | High |
| Attack Requirements | None |
| Privileges Required | None |
| User Interaction | None |
| Vulnerable System Confidentiality Impact | Low |
| Vulnerable System Integrity Impact | Low |
| Vulnerable System Availability Impact | None |
| Subsequent System Confidentiality Impact | None |
| Subsequent System Integrity Impact | None |
| Subsequent System Availability Impact | None |
| CVSSv4 Version | 4.0 |
Status of this issue by product and package
Please note that this evaluation state might be work in progress, incomplete or outdated. Also information for service packs in the LTSS phase is only included for issues meeting the LTSS criteria. If in doubt, feel free to contact us for clarification. The updates are grouped by state of their lifecycle. SUSE product lifecycles are documented on the lifecycle page.
| Product(s) | Source package | State |
|---|---|---|
| Products under general support and receiving all security fixes. | ||
| SUSE Linux Enterprise High Availability Extension 15 SP7 | hawk2 | Not affected |
| SUSE Linux Enterprise High Availability Extension 15 SP7 | rubygem-rack | Not affected |
| SUSE Linux Enterprise High Availability Extension 16.1 | hawk2 | Affected |
| SUSE Linux Enterprise High Performance Computing 15 SP7 | rmt-server | Not affected |
| SUSE Linux Enterprise Module for Public Cloud 15 SP7 | rmt-server | Not affected |
| SUSE Linux Enterprise Module for Server Applications 15 SP7 | rmt-server | Not affected |
| SUSE Linux Enterprise Server 15 SP7 | rmt-server | Not affected |
| SUSE Linux Enterprise Server for SAP Applications 15 SP7 | rmt-server | Not affected |
| SUSE Linux Enterprise Server for SAP applications 16.1 | hawk2 | Affected |
| openSUSE Leap 15.6 | hawk2 | Not affected |
| openSUSE Leap 15.6 | rmt-server | Not affected |
| openSUSE Leap 15.6 | rubygem-rack | Not affected |
| openSUSE Leap 15.6 | rubygem-rack-1_6 | Not affected |
| Products under Long Term Service Pack support and receiving important and critical security fixes. | ||
| SUSE Linux Enterprise High Availability Extension 12 SP5 | hawk2 | Not affected |
| SUSE Linux Enterprise High Availability Extension 15 SP4 | hawk2 | Not affected |
| SUSE Linux Enterprise High Availability Extension 15 SP4 | rubygem-rack | Not affected |
| SUSE Linux Enterprise High Availability Extension 15 SP5 | hawk2 | Not affected |
| SUSE Linux Enterprise High Availability Extension 15 SP5 | rubygem-rack | Not affected |
| SUSE Linux Enterprise High Performance Computing 15 SP4 | rmt-server | Not affected |
| SUSE Linux Enterprise High Performance Computing 15 SP4-LTSS | rmt-server | Not affected |
| SUSE Linux Enterprise High Performance Computing 15 SP5 | rmt-server | Not affected |
| SUSE Linux Enterprise High Performance Computing 15 SP5-LTSS | rmt-server | Not affected |
| SUSE Linux Enterprise Module for Public Cloud 15 SP4 | rmt-server | Not affected |
| SUSE Linux Enterprise Module for Public Cloud 15 SP5 | rmt-server | Not affected |
| SUSE Linux Enterprise Module for Server Applications 15 SP4 | rmt-server | Not affected |
| SUSE Linux Enterprise Module for Server Applications 15 SP5 | rmt-server | Not affected |
| SUSE Linux Enterprise Module for Server Applications 15 SP6 | rmt-server | Not affected |
| SUSE Linux Enterprise Server 15 SP4 | rmt-server | Not affected |
| SUSE Linux Enterprise Server 15 SP4-LTSS | rmt-server | Not affected |
| SUSE Linux Enterprise Server 15 SP5 | rmt-server | Not affected |
| SUSE Linux Enterprise Server 15 SP5-LTSS | rmt-server | Not affected |
| SUSE Linux Enterprise Server 15 SP6 | rmt-server | Not affected |
| SUSE Linux Enterprise Server 15 SP6-LTSS | rmt-server | Not affected |
| SUSE Linux Enterprise Server for SAP Applications 12 SP5 | hawk2 | Not affected |
| SUSE Linux Enterprise Server for SAP Applications 15 SP6 | rmt-server | Not affected |
| SUSE Manager Proxy 4.3 | rmt-server | Not affected |
| SUSE Manager Proxy LTS 4.3 | rmt-server | Not affected |
| SUSE Manager Retail Branch Server 4.3 | rmt-server | Not affected |
| SUSE Manager Retail Branch Server LTS 4.3 | rmt-server | Not affected |
| SUSE Manager Server 4.3 | rmt-server | Not affected |
| SUSE Manager Server LTS 4.3 | rmt-server | Not affected |
| Products past their end of life and not receiving proactive updates anymore. | ||
| SUSE CaaS Platform 4.0 | rmt-server | Not affected |
| SUSE Enterprise Storage 6 | rmt-server | Not affected |
| SUSE Enterprise Storage 7 | rmt-server | Not affected |
| SUSE Enterprise Storage 7.1 | rmt-server | Not affected |
| SUSE Linux Enterprise High Availability Extension 12 SP4 | hawk2 | Not affected |
| SUSE Linux Enterprise High Availability Extension 15 | hawk2 | Not affected |
| SUSE Linux Enterprise High Availability Extension 15 | rubygem-rack | Not affected |
| SUSE Linux Enterprise High Availability Extension 15 SP1 | hawk2 | Not affected |
| SUSE Linux Enterprise High Availability Extension 15 SP1 | rubygem-rack | Not affected |
| SUSE Linux Enterprise High Availability Extension 15 SP2 | hawk2 | Not affected |
| SUSE Linux Enterprise High Availability Extension 15 SP2 | rubygem-rack | Not affected |
| SUSE Linux Enterprise High Availability Extension 15 SP3 | hawk2 | Not affected |
| SUSE Linux Enterprise High Availability Extension 15 SP3 | rubygem-rack | Not affected |
| SUSE Linux Enterprise High Availability Extension 15 SP6 | hawk2 | Not affected |
| SUSE Linux Enterprise High Availability Extension 15 SP6 | rubygem-rack | Not affected |
| SUSE Linux Enterprise High Performance Computing 15 SP1 | rmt-server | Not affected |
| SUSE Linux Enterprise High Performance Computing 15 SP1-ESPOS | rmt-server | Not affected |
| SUSE Linux Enterprise High Performance Computing 15 SP1-LTSS | rmt-server | Not affected |
| SUSE Linux Enterprise High Performance Computing 15 SP2 | rmt-server | Not affected |
| SUSE Linux Enterprise High Performance Computing 15 SP2-ESPOS | rmt-server | Not affected |
| SUSE Linux Enterprise High Performance Computing 15 SP2-LTSS | rmt-server | Not affected |
| SUSE Linux Enterprise High Performance Computing 15 SP3 | rmt-server | Not affected |
| SUSE Linux Enterprise High Performance Computing 15 SP3-ESPOS | rmt-server | Not affected |
| SUSE Linux Enterprise High Performance Computing 15 SP3-LTSS | rmt-server | Not affected |
| SUSE Linux Enterprise High Performance Computing 15 SP4-ESPOS | rmt-server | Not affected |
| SUSE Linux Enterprise High Performance Computing 15 SP5-ESPOS | rmt-server | Not affected |
| SUSE Linux Enterprise High Performance Computing 15 SP6 | rmt-server | Not affected |
| SUSE Linux Enterprise Module for Public Cloud 15 SP1 | rmt-server | Not affected |
| SUSE Linux Enterprise Module for Public Cloud 15 SP2 | rmt-server | Not affected |
| SUSE Linux Enterprise Module for Public Cloud 15 SP3 | rmt-server | Not affected |
| SUSE Linux Enterprise Module for Public Cloud 15 SP6 | rmt-server | Not affected |
| SUSE Linux Enterprise Module for Server Applications 15 SP1 | rmt-server | Not affected |
| SUSE Linux Enterprise Module for Server Applications 15 SP2 | rmt-server | Not affected |
| SUSE Linux Enterprise Module for Server Applications 15 SP3 | rmt-server | Not affected |
| SUSE Linux Enterprise Real Time 15 SP2 | rmt-server | Not affected |
| SUSE Linux Enterprise Real Time 15 SP3 | rmt-server | Not affected |
| SUSE Linux Enterprise Real Time 15 SP4 | rmt-server | Not affected |
| SUSE Linux Enterprise Server 15 SP1 | rmt-server | Not affected |
| SUSE Linux Enterprise Server 15 SP1-BCL | rmt-server | Not affected |
| SUSE Linux Enterprise Server 15 SP1-LTSS | rmt-server | Not affected |
| SUSE Linux Enterprise Server 15 SP2 | rmt-server | Not affected |
| SUSE Linux Enterprise Server 15 SP2-BCL | rmt-server | Not affected |
| SUSE Linux Enterprise Server 15 SP2-LTSS | rmt-server | Not affected |
| SUSE Linux Enterprise Server 15 SP3 | rmt-server | Not affected |
| SUSE Linux Enterprise Server 15 SP3-BCL | rmt-server | Not affected |
| SUSE Linux Enterprise Server 15 SP3-LTSS | rmt-server | Not affected |
| SUSE Linux Enterprise Server for SAP Applications 15 SP1 | rmt-server | Not affected |
| SUSE Linux Enterprise Server for SAP Applications 15 SP2 | rmt-server | Not affected |
| SUSE Linux Enterprise Server for SAP Applications 15 SP3 | rmt-server | Not affected |
| SUSE Linux Enterprise Server for SAP Applications 15 SP4 | rmt-server | Not affected |
| SUSE Linux Enterprise Server for SAP Applications 15 SP5 | rmt-server | Not affected |
| SUSE Manager Proxy 4.0 | rmt-server | Not affected |
| SUSE Manager Proxy 4.1 | rmt-server | Not affected |
| SUSE Manager Proxy 4.2 | rmt-server | Not affected |
| SUSE Manager Retail Branch Server 4.0 | rmt-server | Not affected |
| SUSE Manager Retail Branch Server 4.1 | rmt-server | Not affected |
| SUSE Manager Retail Branch Server 4.2 | rmt-server | Not affected |
| SUSE Manager Server 4.0 | rmt-server | Not affected |
| SUSE Manager Server 4.1 | rmt-server | Not affected |
| SUSE Manager Server 4.2 | rmt-server | Not affected |
| openSUSE Leap 15.3 | hawk2 | Not affected |
| openSUSE Leap 15.3 | rmt-server | Not affected |
| openSUSE Leap 15.3 | rubygem-rack | Not affected |
| openSUSE Leap 15.3 | rubygem-rack-1_6 | Not affected |
| openSUSE Leap 15.4 | hawk2 | Not affected |
| openSUSE Leap 15.4 | rmt-server | Not affected |
| openSUSE Leap 15.4 | rubygem-rack | Not affected |
| openSUSE Leap 15.4 | rubygem-rack-1_6 | Not affected |
| openSUSE Leap 15.5 | hawk2 | Not affected |
| openSUSE Leap 15.5 | rmt-server | Not affected |
| openSUSE Leap 15.5 | rubygem-rack | Not affected |
| openSUSE Leap 15.5 | rubygem-rack-1_6 | Not affected |
| Container Status | ||
| suse/rmt-server | rmt-server | Not affected |
SUSE Timeline for this CVE
CVE page created: Thu Apr 2 22:05:54 2026CVE page last modified: Fri Apr 3 16:52:23 2026