GHSA-x746-7m8f-x49c · Severity: medium · Ecosystem: pip — Starlette: Arbitrary HTTP method dispatched to `HTTPEndpoint` attributes via `getattr`
Starlette is a lightweight ASGI framework/toolkit. In versions 1.0.1 and below, when dispatching a request, HTTPEndpoint selects the handler by lowercasing the HTTP method and looking it up as an attribute with getattr, without restricting the lookup to a known set of HTTP verbs. When an HTTPEndpoint subclass is registered through Route(...) without an explicit methods= argument, the route does not constrain the method and every method reaches the endpoint. If a non-standard HTTP method whose lowercased name matches an attribute on the endpoint subclass reaches the endpoint, that attribute is invoked as if it were a request handler. An attacker can use this to reach methods that were never meant to be HTTP handlers, such as internal helpers, without the authorization checks applied by the intended public handler. An application (including Starlette-based frameworks like FastAPI) is affected if it registers an HTTPEndpoint subclass via Route(...) without explicitly setting methods=, and that subclass includes extra methods named like non-standard HTTP verbs that take one request argument and return a response. This issue has been fixed in version 1.1.0.
Conclusion & alert: CVE-2026-48817 is rated Low Risk (30.8/100): CVSS Medium severity, with low exploitation likelihood (EPSS 0.35%). Mandatory action: Monitor for updates and reassess as exploit intelligence or EPSS changes.
Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.
EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).
| # | Date | Old EPSS score | New EPSS score | Delta (New - Old) |
|---|---|---|---|---|
| 1 | 2026-06-18 | 0.04% | 0.35% | +0.31% |
| 2 | 2026-06-12 | — | 0.04% | — |
Full EPSS history (2 records total)
CVSS metrics for this CVE.
| Base score | Version | Severity | Vector | Exploitability | Impact | Score source |
|---|---|---|---|---|---|---|
| 5.3 | 3.1 | MEDIUM |
|
3.9 | 1.4 | [email protected] |
GHSA-x746-7m8f-x49c · Severity: medium · Ecosystem: pip — Starlette: Arbitrary HTTP method dispatched to `HTTPEndpoint` attributes via `getattr`
| vendor | priority | summary | link |
|---|---|---|---|
debian
|
not yet assigned | CVE-2026-48817 not yet assigned priority: Debian including 1 source packages (starlette), 5 status rows across 5 suites (bookworm, bullseye, forky, sid, trixie): open 3, resolved 2. | https://security-tracker.debian.org/tracker/CVE-2026-48817 |
redhat
|
medium | — | https://access.redhat.com/security/cve/CVE-2026-48817 |
suse
|
medium | — | https://www.suse.com/security/cve/CVE-2026-48817/ |
ubuntu
|
medium | CVE-2026-48817 medium priority: Ubuntu including 1 source packages (starlette), 5 status rows across 5 suites (jammy, noble, questing, resolute, upstream): needs-triage 4, released 1. | https://ubuntu.com/security/CVE-2026-48817 |
| Vendor | Product | Version | Raw CPE |
|---|---|---|---|
| No affected products in dataset. | |||