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CVE-2026-48595
medium
CVSS 5.9
Vulnerability in tesla (CVE-2026-48595)
Summary
vulnerability in tesla (CVE-2026-48595). Confidential information can be exposed externally. Exploitable via ``Tesla.Middleware.FollowRedirects``. Mitigation: upgrade to `1.18.3` or later.
AI summary snake-internal / snake-material-v2
A vulnerability tracked as **CVE-2026-48595** has been found in tesla.
Attackers can target a specific entry point like ``Tesla.Middleware.FollowRedirects`` over the network to misuse the product.
Confidential information can be exposed externally. CVSS score: 5.9/10.
What to do: upgrade tesla to **1.18.3** or later.
If unsure, ask your IT team or search "tesla CVE-2026-48595" on the vendor's site.
CVE-2026-48595 (tesla) — CWE-178 / CVSS v3 5.9
Attack vector: remote (network-reachable) / unauthenticated / no user interaction
Attack surface: `Tesla.Middleware.FollowRedirects` / `Authorization` / `tesla` / `Tesla.Middleware.Headers`
Patched: `1.18.3` — apply immediately
Workaround: Normalize all header keys to lowercase before passing them to Tesla.
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-178) exists in tesla. Attackers reach the vulnerable code path via ``Tesla.Middleware.FollowRedirects`` without authentication.
📍 Affected scope
tesla — . Attack surface: `Tesla.Middleware.FollowRedirects` / `Authorization` / `tesla` / `Tesla.Middleware.Headers`.
🔥 Severity
Severity: Medium (CVSS 5.9/10). Confidential information can be exposed externally
🔧 How to fix
Update to **1.18.3**.
🛡️ Workaround
Workaround: Normalize all header keys to lowercase before passing them to Tesla.
🔍 Detection
Search webserver/proxy logs for unusual request patterns matching this CVE's known IOCs. Run `grep -r 'tesla' .` 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
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1Identify exposure identify
grep -r 'tesla' . | 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 `tesla` を grep し、稼働しているサービス・バージョンを把握する。
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5Apply temporary workaround mitigate
Normalize all header keys to lowercase before passing them to Tesla.パッチが適用されるまでの応急処置として、Normalize all header keys to lowercase before passing them to Tesla. を実施。回避策の副作用 (機能低下) を確認した上で。
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6Apply patch patch
Upgrade tesla to 1.18.3ステージング環境で 1.18.3 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。
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7Post-deployment verification verify
Confirm patched version is live in production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
Hex
tesla
[{"type":"SEMVER","events":[{"introduced":"1.4.0"},{"fixed":"1.18.3"}]}]
erlang
tesla
[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.18.3"}]}]
References
- advisory 6b3ad84c-e1a6-4bf7-a703-f496b71e49db
- advisory 6b3ad84c-e1a6-4bf7-a703-f496b71e49db
- exploit 134c704f-9b21-4f2e-91b3-4a467353bcc0
- package https://hex.pm/packages/tesla
- patch 6b3ad84c-e1a6-4bf7-a703-f496b71e49db
- web https://nvd.nist.gov/vuln/detail/CVE-2026-48595
- web https://github.com/advisories/GHSA-9m9w-gxf7-rh8m