CVE detail
CVE-2026-48710
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.
Buzz score
Why this CVE is surfacing
This all-time snapshot uses the same composite formula as Trending across a 30-year evidence window, rather than a current rolling window.
Buzz score components · mention 30.0 · diversity 20.0 · KEV 0.0 · OTX 0.0 · PoC 0.0
Why it matters now
Mention timeline
- Total mentions
- 0
- within the 30d window
- Peak daily
- 0
- highest bucket
Evidence
Source links by recency
29 source links · newest first
A command injection vulnerability (CVE-2026-42271) in BerryAI’s LiteLLM open-source AI gateway is being exploited by attackers, the US Cybersecurity and Infrastructure Security Agency (CISA) confirmed by adding the flaw to its Known Exploited Vulnerabilities catalog on Monday. About CVE-2026-42271 LiteLLM is an open-source library that provides a unified interface for calling many different large language model APIs using a single (OpenAI) format. It’s used by both developers and enterprises, to avoid vendor lock-in, centrally manage … More →
newswww.helpnetsecurity.comJun 9, 2026, 11:37 AM- CVE-2026-42271 Chained with CVE-2026-48710Horizon3.ai
CVE-2026-27771 is a high-severity authentication bypass vulnerability affecting Gitea’s built-in package and container registry functionality. The flaw may allow unauthenticated attackers to retrieve private container images and package artifacts without valid credentials.
exploithorizon3.aiJun 1, 2026, 9:21 PM - Badhost and Starlette - most people are dumbHacker News
Linked URL: https://marcelotryle.com/blog/2026/05/28/cve-2026-48710-a-maintainers-perspective/ | Posted by kludex | 13 points | 3 comments
communitynews.ycombinator.comMay 29, 2026, 3:41 PM A single malformed character in a web request can let an unauthenticated attacker slip past the access controls that guard applications built on Starlette, the open-source Python framework that powers FastAPI, researchers said. The flaw, tracked as CVE-2026-48710 could allow attackers to bypass host-validation protections using malformed Host headers, according to an advisory from cybersecurity […]
newswww.csoonline.comMay 27, 2026, 2:46 PM- https://access.redhat.com/errata/RHSA-2026:51357access.redhat.com
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Exploitaccess.redhat.comMay 26, 2026, 10:16 PM - https://access.redhat.com/errata/RHSA-2026:44696access.redhat.com
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Exploitaccess.redhat.comMay 26, 2026, 10:16 PM - https://access.redhat.com/errata/RHSA-2026:43038access.redhat.com
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Exploitaccess.redhat.comMay 26, 2026, 10:16 PM - https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-48710.jsonsecurity.access.redhat.com
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Vendor Advisorysecurity.access.redhat.comMay 26, 2026, 10:16 PM - https://bugzilla.redhat.com/show_bug.cgi?id=2481742bugzilla.redhat.com
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Exploitbugzilla.redhat.comMay 26, 2026, 10:16 PM - https://access.redhat.com/security/cve/CVE-2026-48710access.redhat.com
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Exploitaccess.redhat.comMay 26, 2026, 10:16 PM - https://access.redhat.com/errata/RHSA-2026:37275access.redhat.com
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Exploitaccess.redhat.comMay 26, 2026, 10:16 PM - https://access.redhat.com/errata/RHSA-2026:34532access.redhat.com
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Exploitaccess.redhat.comMay 26, 2026, 10:16 PM - https://access.redhat.com/errata/RHSA-2026:34526access.redhat.com
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Exploitaccess.redhat.comMay 26, 2026, 10:16 PM - https://access.redhat.com/errata/RHSA-2026:34456access.redhat.com
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Exploitaccess.redhat.comMay 26, 2026, 10:16 PM - https://access.redhat.com/errata/RHSA-2026:30089access.redhat.com
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Exploitaccess.redhat.comMay 26, 2026, 10:16 PM - https://access.redhat.com/errata/RHSA-2026:30088access.redhat.com
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Exploitaccess.redhat.comMay 26, 2026, 10:16 PM - https://access.redhat.com/errata/RHSA-2026:26226access.redhat.com
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Exploitaccess.redhat.comMay 26, 2026, 10:16 PM - https://access.redhat.com/errata/RHSA-2026:24866access.redhat.com
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Exploitaccess.redhat.comMay 26, 2026, 10:16 PM - https://access.redhat.com/errata/RHSA-2026:23346access.redhat.com
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Exploitaccess.redhat.comMay 26, 2026, 10:16 PM - https://access.redhat.com/errata/RHSA-2026:22993access.redhat.com
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Exploitaccess.redhat.comMay 26, 2026, 10:16 PM - https://access.redhat.com/errata/RHSA-2026:22992access.redhat.com
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Exploitaccess.redhat.comMay 26, 2026, 10:16 PM No excerpt available.
Exploitwww.x41-dsec.deMay 26, 2026, 10:16 PM- https://www.secwest.net/starlettewww.secwest.net
No excerpt available.
Exploitwww.secwest.netMay 26, 2026, 10:16 PM No excerpt available.
Mitigationostif.orgMay 26, 2026, 10:16 PMNo excerpt available.
Exploitgithub.comMay 26, 2026, 10:16 PMNo excerpt available.
Exploitgithub.comMay 26, 2026, 10:16 PMNo excerpt available.
Exploitgithub.comMay 26, 2026, 10:16 PM- https://badhost.orgbadhost.org
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Mitigationbadhost.orgMay 26, 2026, 10:16 PM Linked URL: https://badhost.org/ | Posted by ylk | 126 points | 51 comments
communitynews.ycombinator.comMay 26, 2026, 9:07 AM
Exploit code
Public exploit repository references
Public PoC repositories are third-party, potentially unsafe artifacts. Treat their code as untrusted and use it only on authorized systems in an isolated, least-privilege environment. cvebuzz does not execute the code or verify that an exploit works.
0 repository references · best confidence N/A · max 0 stars
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