{"answers":{"affected":"3 open source packages ship an affected version, including starlette. It affects 8 products.","exploited":"Yes. Attackers have exploited CVE-2026-48710 in the wild since at least 2 Sep 2026.","fix":"Upgrade starlette to 1.0.1 or later. US federal agencies must fix it by 16 Sep 2026.","what":"CVE-2026-48710 is a medium-severity vulnerability in Redhat Satellite, published on 26 May 2026. An attacker can exploit it over the internet without logging in, with no action from the victim."},"fix_prompt":"Check this codebase for CVE-2026-48710 and fix it if it is affected.\n\nWhat it is: CVE-2026-48710 is a medium-severity vulnerability in Redhat Satellite, published on 26 May 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.\nExploitation: Yes. Attackers have exploited CVE-2026-48710 in the wild since at least 2 Sep 2026.\n\nAffected packages and fixed versions:\n- starlette (PyPI): affected all versions; fixed in 1.0.1\n- starlette (PyPI): affected all versions; fixed in 1.0.1\n- starlette (PyPI): affected all versions; fixed in 1.0.1\n\nTask:\n1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.\n2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.\n3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.\n4. Run the tests and summarise what changed and why.\n5. If nothing in the project is affected, say so and change nothing.\n\nReference: https://insights.sbomify.com/CVE-2026-48710/ (Markdown: https://insights.sbomify.com/CVE-2026-48710/index.md)","id":"CVE-2026-48710","markdown":"https://insights.sbomify.com/CVE-2026-48710/index.md","name":"CVE-2026-48710","record":{"aliases":["CLEANSTART-2026-FT89883","CLSA-2026-1781052728","CLSA-2026-1789648460","DEBIAN-CVE-2026-48710","ECHO-8103-2b4d-a762","GHSA-86qp-5c8j-p5mr","MINI-2fh3-9x8p-7695","MINI-3wr7-25wj-mvwh","MINI-62xj-rx29-wwv5","MINI-65v2-9wp6-rcm2","MINI-6q84-j25v-j4qm","MINI-76vr-gm9x-7v6q","MINI-96mf-2m6r-mmvw","MINI-9v8h-8r44-w88x","MINI-fvvx-8399-97j4","MINI-fwf6-6qvj-c6hx","MINI-g76q-r358-6xq5","MINI-p8m5-2hq4-w3rr","MINI-q58q-mjj6-fjc3","MINI-r6x2-6pgh-mxgh","MINI-rc7p-w479-97f2","MINI-v36h-2cxq-ww56","MINI-vhxq-7hch-cpm5","MINI-vwcp-qw56-3cwm","PYSEC-2026-161","ROOT-APP-PYPI-CVE-2026-48710","UBUNTU-CVE-2026-48710","X41-2026-002","openSUSE-SU-2026:11026-1","openSUSE-SU-2026:11044-1"],"analysis":{"component_type":"library","fix_type":"upgrade","impacts":["security_bypass"],"network_reachable":"yes","non_default_config":false,"product_category":"Python ASGI framework","requires_auth":"none","summary":"Attackers can bypass path-based security checks in Starlette applications by sending a malformed Host header that poisons the reconstructed request URL.","user_interaction":"not_required","vuln_class":"security_feature_bypass"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"GitHub_M","cpe":[{"product":"starlette","vendor":"encode"},{"product":"ai_inference_server","vendor":"redhat"},{"product":"ansible_automation_platform","vendor":"redhat"},{"product":"enterprise_linux_ai","vendor":"redhat"},{"product":"migration_toolkit_for_applications","vendor":"redhat"},{"product":"openshift_ai","vendor":"redhat"},{"product":"openshift_lightspeed","vendor":"redhat"},{"product":"satellite","vendor":"redhat"}],"cvss":{"score":6.5,"severity":"medium","source":"cna","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N","version":"3.1"},"cwes":[{"id":"CWE-1289","name":"Improper Validation of Unsafe Equivalence in Input"},{"id":"CWE-444","name":"Inconsistent Interpretation of HTTP Requests"}],"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.","ecosystems":["PyPI","openSUSE:Tumbleweed"],"exploits":{"exploitdb":0,"first_seen":"2026-04-01","github_poc":5,"max_poc_stars":3,"metasploit":0,"nuclei":1,"refs":[{"date":"2026-04-01T02:12:00Z","kind":"github_poc","ref":"https://github.com/eris-ths/supply-chain-guard","stars":3,"title":"Detect, assess, and respond to supply chain attacks across npm/yarn and Python (pip/poetry/uv). Claude Code skill + standalone scripts. Built during axios RAT (2026-03-31) and Starlette BadHost CVE-2026-48710 (2026-05-22)."},{"date":"2026-05-27T02:58:39Z","kind":"github_poc","ref":"https://github.com/xtremebeing/starlette-host-header-lab","stars":1,"title":"Starlette Host-Header URL Confusion Lab (X41-2026-002) - CVE-2026-48710"},{"date":"2026-05-28T09:57:43Z","kind":"github_poc","ref":"https://github.com/Bhanunamikaze/BadHost-CVE-2026-48710-Exploit","stars":1,"title":"Detection scanner for CVE-2026-48710 - Host-header auth bypass in Starlette/FastAPI"},{"date":"2026-08-03T16:21:30Z","kind":"github_poc","ref":"https://github.com/sb-ox/repro-OXDEV-77637-uv-workspace","stars":0,"title":"OXDEV-77637 repro fixture: uv workspace whose transitive CVE (starlette 0.25.0 / CVE-2026-48710) is dropped when the lean clone omits workspace-member pyproject.toml. Tag: repro-OXDEV-77637"},{"date":"2026-08-11T08:21:36Z","kind":"github_poc","ref":"https://github.com/CuteeCat/CVE-2026-48710","stars":0,"title":"CVE-2026-48710漏洞验证代码"},{"date":null,"kind":"nuclei","ref":"http/cves/2026/CVE-2026-48710.yaml","stars":null,"title":"Starlette - Improper Validation of Unsafe Equivalence in Input"}],"tier":"exploited"},"has_fix":true,"headline":"Kludex Starlette HTTP Request/Response Smuggling","id":"CVE-2026-48710","indexable":true,"kev":{"dateAdded":"2026-09-02","dueDate":"2026-09-16","knownRansomwareCampaignUse":"Unknown","product":"Starlette","requiredAction":"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.","vendorProject":"Kludex","vulnerabilityName":"Kludex Starlette HTTP Request/Response Smuggling Vulnerability"},"kind":"cve","links":{"ecosystem":"PyPI","product":"redhat:satellite","products":["redhat:satellite"],"type":"security_feature_bypass","year":"2026"},"n_packages":5,"n_references":7,"next":{"headline":"SSHFS: Improper Neutralization of Argument Delimiters in a Command ('Argument Injection')","id":"CVE-2026-48711"},"packages":[{"ecosystem":"PyPI","fixed":["1.0.1"],"introduced":["0"],"last_affected":[],"package":"starlette","purl":null,"source":"GHSA-86qp-5c8j-p5mr"},{"ecosystem":"PyPI","fixed":["1.0.1"],"introduced":["0"],"last_affected":[],"package":"starlette","purl":"pkg:pypi/starlette","source":"GHSA-86qp-5c8j-p5mr"},{"ecosystem":"PyPI","fixed":["1.0.1"],"introduced":["0"],"last_affected":[],"package":"starlette","purl":"pkg:pypi/starlette","source":"PYSEC-2026-161"},{"ecosystem":"openSUSE:Tumbleweed","fixed":["2.2.0-1.1"],"introduced":["0"],"last_affected":[],"package":"python-google-adk","purl":"pkg:rpm/opensuse/python-google-adk\u0026distro=openSUSE%20Tumbleweed","source":"openSUSE-SU-2026:11044-1"},{"ecosystem":"openSUSE:Tumbleweed","fixed":["1.2.0-1.1"],"introduced":["0"],"last_affected":[],"package":"python-starlette","purl":"pkg:rpm/opensuse/python-starlette\u0026distro=openSUSE%20Tumbleweed","source":"openSUSE-SU-2026:11026-1"}],"prev":{"headline":"OliveTin: ValidateArgumentType API Endpoint Missing Authentication Allows Action and Argument Enumeration","id":"CVE-2026-48709"},"products":["starlette"],"published":"2026-05-26","related":[{"cvss_score":7.5,"headline":"Starlette: request.form() limits silently ignored for application/x-www-form-urlencoded enable DoS","id":"CVE-2026-54283","kev_date_added":null,"published":"2026-06-22"},{"cvss_score":7.5,"headline":"Starlette: SSRF and NTLM credential theft via UNC paths in StaticFiles on Windows","id":"CVE-2026-48818","kev_date_added":null,"published":"2026-06-17"},{"cvss_score":7.5,"headline":"Starlette has Path Traversal vulnerability in StaticFiles","id":"CVE-2023-29159","kev_date_added":null,"published":"2023-06-01"},{"cvss_score":7.5,"headline":"MultipartParser DOS with too many fields or files in Starlette Framework","id":"CVE-2023-30798","kev_date_added":null,"published":"2023-04-21"},{"cvss_score":5.3,"headline":"Starlette: Arbitrary HTTP method dispatched to `HTTPEndpoint` attributes via `getattr`","id":"CVE-2026-48817","kev_date_added":null,"published":"2026-06-17"},{"cvss_score":3.7,"headline":"Starlette: Unvalidated request path concatenated into authority poisons request.url.hostname","id":"CVE-2026-54282","kev_date_added":null,"published":"2026-06-22"}],"sources":[{"class":"attribution","licence":"CVE Terms of Use (MITRE)","name":"CVE List","prefix":"CVE"},{"class":"attribution","licence":"CC BY 4.0","name":"GitHub Advisory Database","prefix":"GHSA"},{"class":"attribution","licence":"CC BY 4.0","name":"PyPA Advisory Database","prefix":"PYSEC"},{"class":"attribution","licence":"CC BY 4.0","name":"SUSE","prefix":"openSUSE"},{"class":"attribution","licence":"US public information, NVD API terms","name":"NVD"},{"class":"open","licence":"CC0 1.0","name":"CISA KEV"},{"class":"attribution","licence":"CWE Terms of Use","name":"CWE (MITRE)"},{"class":"attribution","licence":"FIRST CVSS licence","name":"CVSS (FIRST)"},{"class":"attribution","licence":"MIT","name":"Nuclei templates"},{"class":"open","licence":"CC0","name":"PoC-in-GitHub"}],"ssvc":{"automatable":"yes","exploitation":"active","technical_impact":"partial"},"state":"PUBLISHED","updated":"2026-10-01","vendors":["Kludex"]},"summary":"Attackers can bypass path-based security checks in Starlette applications by sending a malformed Host header that poisons the reconstructed request URL.","url":"https://insights.sbomify.com/CVE-2026-48710/"}