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CVE-2026-40070
Vulnerability in bsv-sdk (CVE-2026-40070)
Summary
vulnerability in bsv-sdk (CVE-2026-40070). Risk of unauthorized operations or information disclosure. Exploitable via ``acquire_certificate``. Mitigation: upgrade to `0.8.2` or later.
AI summary snake-internal / snake-material-v2
A vulnerability tracked as **CVE-2026-40070** has been found in bsv-sdk.
Attackers can target a specific entry point like ``acquire_certificate`` over the network to misuse the product.
Risk of unauthorized operations or information disclosure. CVSS score: ?/10.
What to do: upgrade bsv-sdk to **0.8.2** or later.
If unsure, ask your IT team or search "bsv-sdk CVE-2026-40070" on the vendor's site.
CVE-2026-40070 (bsv-sdk) — CWE-347 /
Attack surface: `acquire_certificate` / `files` / `list_certificates` / `prove_certificate`
Patched: `0.8.2` — apply immediately
Workaround: - Do not expose `acquire_certificate` (either acquisition protocol) to untrusted callers.
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-347) exists in bsv-sdk. Attackers reach the vulnerable code path via ``acquire_certificate`` without authentication.
📍 Affected scope
bsv-sdk — . Attack surface: `acquire_certificate` / `files` / `list_certificates` / `prove_certificate`.
🔥 Severity
Severity: ?. Risk of unauthorized operations or information disclosure
🔧 How to fix
Update to **0.8.2**.
🛡️ Workaround
Workaround: - Do not expose `acquire_certificate` (either acquisition protocol) to untrusted callers.
🔍 Detection
Search webserver/proxy logs for unusual request patterns matching this CVE's known IOCs. Run `grep -r 'bsv-sdk' .` 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 'bsv-sdk' . | 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 `bsv-sdk` 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
- Do not expose `acquire_certificate` (either acquisition protocol) to untrusted callers.パッチが適用されるまでの応急処置として、- Do not expose `acquire_certificate` (either acquisition protocol) to untrusted callers. を実施。回避策の副作用 (機能低下) を確認した上で。
-
6Apply patch patch
Upgrade bsv-sdk to 0.8.2ステージング環境で 0.8.2 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
rubygems
bsv-sdk
[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0.8.2"}]}]
rubygems
bsv-wallet
[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0.3.4"}]}]
References
- web https://github.com/sgbett/bsv-ruby-sdk/security/advisories/GHSA-hc36-c89j-5f4j
- web https://nvd.nist.gov/vuln/detail/CVE-2026-40070
- web https://github.com/sgbett/bsv-ruby-sdk/issues/305
- web https://github.com/sgbett/bsv-ruby-sdk/pull/306
- web https://github.com/sgbett/bsv-ruby-sdk/commit/4992e8a265fd914a7eeb0405c69d1ff0122a84cc
- web https://brc.dev/52
- web https://github.com/rubysec/ruby-advisory-db/blob/master/gems/bsv-sdk/CVE-2026-40070.yml
- web https://github.com/rubysec/ruby-advisory-db/blob/master/gems/bsv-wallet/CVE-2026-40070.yml
- web https://github.com/advisories/GHSA-hc36-c89j-5f4j