6.5
Medium
Exploited
CVE-2026-48710 Kludex Starlette HTTP Request/Response Smuggling Vulnerability
Active exploitation observed
· CISA KEV catalogue
Required action
Apply mitigations in accordance with vendor instructions, ensuring compliance with CISA’s BOD 26-04 Prioritizing Security Updates Based on Risk (see URL in Notes) guidance and CISA’s “Forensics Triage Requirements” (see URL in Notes). Follow applicable BOD 26-04 guidance for cloud services or discontinue use of the product if mitigations are unavailable. Stakeholders are responsible for evaluating each asset's internet exposure and ensuring adherence to BOD 26-04 patching guidelines.
Ransomware campaigns
Not observed so far
Weakness
CWE-444
Description
Starlette is a lightweight ASGI framework/toolkit. Prior to version 1.0.1, the HTTP `Host` request header was not validated before being used to reconstruct `request.url`. Because the routing algorithm relies on the raw HTTP path while `request.url` is rebuilt from the `Host` header, a malformed header could make `request.url.path` differ from the path that was actually requested. Middleware and endpoints that apply security restrictions based on `request.url` (rather than the raw `scope` path) could therefore be bypassed. Users should upgrade to a version greater than or equal to version 1.0.1, which validates the `Host` header against the grammar of RFC 9112 §3.2 / RFC 3986 §3.2.2 when constructing `request.url` and falls back to `scope["server"]` for malformed values.
Affected products and versions
| Product | Affected versions | Fixed in |
|---|---|---|
| starlette 1.0 | earliest → < 1.0.1 | 1.0.1 |
| ai-inference-server-3 | Versions not published | |
| ansible_automation_platform-2 | Versions not published | |
| mta-8 | Versions not published | |
| exploit-intelligence | Versions not published | |
| ols-1 | Versions not published | |
| openshift-ai | Versions not published | |
| rhel-ai-3 | Versions not published | |
| openshift-hosted-osd4 | Versions not published |
Show the 28 other branches Hide the 28 other branches
| Product | Affected versions | Fixed in |
|---|---|---|
| rhn_satellite_6 | Versions not published | |
| rhel-cla-0 | Versions not published | |
| services-ansible-lightspeed-chatbot | Versions not published | |
| services-ansible-nexus | Versions not published | |
| services-inventory | Versions not published | |
| services-management-platform | Versions not published | |
| services-digital-roadmap | Versions not published | |
| services-ansible-on-clouds | Versions not published | |
| services-rhel-lightspeed | Versions not published | |
| services-lightspeed-agent-google-cloud | Versions not published | |
| services-vulnerability-engine | Versions not published | |
| Red Hat Ansible Automation Platform 2.6 1780102732 | earliest → < 1780102732 | 1780102732 |
| Red Hat Ansible Automation Platform 2.7 1780099185 | earliest → < 1780099185 | 1780099185 |
| Red Hat Satellite 6.18 1784554123 | earliest → < 1784554123 | 1784554123 |
| Red Hat Satellite 6.19 1788190224 | earliest → < 1788190224 | 1788190224 |
| Exploit Intelligence | Versions not published | |
| Migration Toolkit for Applications 8 | Versions not published | |
| OpenShift Lightspeed | Versions not published | |
| Red Hat AI Inference Server | Versions not published | |
| Red Hat Enterprise Linux AI (RHEL AI) 3 | Versions not published | |
| Red Hat OpenShift AI (RHOAI) | Versions not published | |
| Red Hat Satellite 6 | Versions not published | |
| Red Hat Ansible Automation Platform 2 | Versions not published | |
| Red Hat AI Inference Server 3.3 1782352847 | earliest → < 1782352847 | 1782352847 |
| Red Hat OpenShift AI 3.4 1787068065 | earliest → < 1787068065 | 1787068065 |
| Red Hat OpenShift AI 3.3 1782471730 | earliest → < 1782471730 | 1782471730 |
| Red Hat Migration Toolkit for Applications 8.2 1784109883 | earliest → < 1784109883 | 1784109883 |
| Red Hat Satellite 6.17 1784834402 | earliest → < 1784834402 | 1784834402 |
References
- github.com github.com
- github.com github.com
- badhost.org badhost.org
- github.com github.com
- ostif.org ostif.org
- www.secwest.net www.secwest.net
- www.x41-dsec.de www.x41-dsec.de
Timeline
- Published
- Added to the KEV catalogue
- Last modified