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CVE-2026-48710
medium
CVSS 6.5
Vulnerability in starlette (CVE-2026-48710)
Summary
vulnerability in starlette (CVE-2026-48710). Risk of unauthorized operations or information disclosure. Exploitable via `GET /foo`. Mitigation: upgrade to `1.0.1` or later.
AI summary snake-internal / snake-material-v2
A vulnerability tracked as **CVE-2026-48710** has been found in starlette.
Attackers can target a specific entry point like `GET /foo` over the network to misuse the product.
Risk of unauthorized operations or information disclosure. CVSS score: 6.5/10.
What to do: upgrade starlette to **1.0.1** or later.
If unsure, ask your IT team or search "starlette CVE-2026-48710" on the vendor's site.
CVE-2026-48710 (starlette) — CWE-444 / CVSS v3 6.5
Attack vector: remote (network-reachable) / unauthenticated / no user interaction
Attack surface: GET /foo / Host header / `Host` / `request.url`
Patched: `1.0.1` — apply immediately
Plan: 1) Audit SBOM/dependencies, 2) Stage→prod upgrade, 3) Add WAF/proxy monitoring on affected endpoints, 4) Hunt IOCs in logs.
Refs: see the GHSA / vendor advisory / patched release linked on this page.
❓ What is the problem
**A vulnerability** (CWE-444) exists in starlette. Attackers reach the vulnerable code path via `GET /foo` without authentication.
📍 Affected scope
starlette — . Attack surface: GET /foo / Host header / `Host` / `request.url`.
🔥 Severity
Severity: Medium (CVSS 6.5/10). Risk of unauthorized operations or information disclosure
🔧 How to fix
Update to **1.0.1**.
🛡️ Workaround
Until the patch is applied: disable the affected feature, apply WAF rules, or restrict access via network ACLs.
🔍 Detection
Search webserver/proxy logs for unusual `GET /foo` requests with malformed payloads or SQL meta-characters. Run `grep -r 'starlette' .` against your dependency files (package-lock.json, requirements.txt, go.sum) to find affected services.
Response Actions (7 steps)
Concrete steps and command examples for SOC/SRE teams to execute in order
-
1Identify exposure identify
grep -r 'starlette' . | grep -v node_modulesリポジトリと本番環境の依存ファイル (package-lock.json / requirements.txt / go.sum / Gemfile.lock 等) で `starlette` を grep し、稼働しているサービス・バージョンを把握する。
-
3Hunt for indicators of compromise detect
grep 'GET /foo' /var/log/nginx/access.log | grep -E '(unusual_payload|sqli_pattern)'アクセスログで `GET /foo` への異常なリクエスト (不正な認証ヘッダ・SQLメタ文字)を過去 30〜90日分捜索。WAF/SIEM があれば該当パスのアラート発火履歴を確認。
-
6Apply patch patch
Upgrade starlette to 1.0.1ステージング環境で 1.0.1 に上げて回帰テスト → 本番反映。回帰テストはアプリの主要ハッピーパスと、Step 3 で見つけた異常検知の続報チェックを含めること。
-
7Post-deployment verification verify
Replay attack against GET /foo on staging to confirm patch closes the vectorパッチ適用後、ステージングで PoC または同等の悪用パターンを再現して脆弱性が閉じたことを確認。本番では Step 3 と同じログクエリでアラート再発が無いか継続監視。
Affected packages
PyPI
starlette
[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.0.1"}]}]
pip
starlette
[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.0.1"}]}]
References
- advisory https://www.x41-dsec.de/lab/advisories/x41-2026-002-starlette/
- package https://github.com/Kludex/starlette
- web https://badhost.org
- web https://github.com/Kludex/starlette/commit/764dab0dcfb9033d75442d7a359645c9f94648c6
- web https://github.com/Kludex/starlette/security/advisories/GHSA-86qp-5c8j-p5mr
- web https://github.com/pypa/advisory-database/tree/main/vulns/starlette/PYSEC-2026-161.yaml
- web https://ostif.org/disclosing-the-badhost-vulnerability-in-starlette
- web https://www.secwest.net/starlette
- web https://www.x41-dsec.de/lab/advisories/x41-2026-002-starlette
- web https://ostif.org/disclosing-the-badhost-vulnerability-in-starlette/
- web https://nvd.nist.gov/vuln/detail/CVE-2026-48710
- web https://github.com/advisories/GHSA-86qp-5c8j-p5mr
- web https://access.redhat.com/security/cve/CVE-2026-48710
- web https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-48710.json
- web https://www.cve.org/CVERecord?id=CVE-2026-48710
- web https://bugzilla.redhat.com/show_bug.cgi?id=2481742
- web https://access.redhat.com/errata/RHSA-2026:22992
- web https://access.redhat.com/errata/RHSA-2026:22993
- web https://access.redhat.com/errata/RHSA-2026:23346
- web https://access.redhat.com/errata/RHSA-2026:24866
- web https://access.redhat.com/errata/RHSA-2026:26226
- web https://access.redhat.com/errata/RHSA-2026:30088
- web https://access.redhat.com/errata/RHSA-2026:30089
- web https://access.redhat.com/errata/RHSA-2026:34456
- web https://access.redhat.com/errata/RHSA-2026:34526
- web https://access.redhat.com/errata/RHSA-2026:34532