Starlette has missing Host header validation that poisons request.url.path, bypassing path-based security checks
Starlette has missing Host header validation that poisons request.url.path, bypassing path-based security checks
Affected packages
- starlette— before 1.0.1
Exploit signal
- Known exploited (CISA KEV)
- Yes
- EPSS score
- —
- EPSS percentile
- —
EPSS is the probability a CVE is exploited in the wild; percentile is its rank among all CVEs.
Sources
- https://github.com/Kludex/starlette/security/advisories/GHSA-86qp-5c8j-p5mr
- https://nvd.nist.gov/vuln/detail/CVE-2026-48710
- https://github.com/Kludex/starlette/commit/764dab0dcfb9033d75442d7a359645c9f94648c6
- https://www.x41-dsec.de/lab/advisories/x41-2026-002-starlette
- https://www.secwest.net/starlette
- https://www.cve.org/CVERecord?id=CVE-2026-48710
- https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-48710.json
- https://ostif.org/disclosing-the-badhost-vulnerability-in-starlette
- https://github.com/pypa/advisory-database/tree/main/vulns/starlette/PYSEC-2026-161.yaml
- https://github.com/Kludex/starlette
- https://bugzilla.redhat.com/show_bug.cgi?id=2481742
- https://badhost.org
- https://access.redhat.com/security/cve/CVE-2026-48710
- https://access.redhat.com/errata/RHSA-2026:60520
- https://access.redhat.com/errata/RHSA-2026:51357
- https://access.redhat.com/errata/RHSA-2026:44696
- https://access.redhat.com/errata/RHSA-2026:43038
- https://access.redhat.com/errata/RHSA-2026:37275
- https://access.redhat.com/errata/RHSA-2026:34532
- https://access.redhat.com/errata/RHSA-2026:34526
- https://access.redhat.com/errata/RHSA-2026:34456
- https://access.redhat.com/errata/RHSA-2026:30089
- https://access.redhat.com/errata/RHSA-2026:30088
- https://access.redhat.com/errata/RHSA-2026:26226
- https://access.redhat.com/errata/RHSA-2026:24866
- https://access.redhat.com/errata/RHSA-2026:23346
- https://access.redhat.com/errata/RHSA-2026:22993
- https://access.redhat.com/errata/RHSA-2026:22992
Structured record: https://osv.dev/vulnerability/GHSA-86qp-5c8j-p5mr
Recommended response stack
Snyk — Scan your dependencies in CI and fix this vulnerability.→Socket — Detect malicious and compromised packages before they ship.→
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