← Back
DEBIAN-CVE-2026-33306
Vulnerability in ruby-bcrypt (DEBIAN-CVE-2026-33306)
Summary
vulnerability in ruby-bcrypt (DEBIAN-CVE-2026-33306). Risk of unauthorized operations or information disclosure. Exploitable via ``BCrypt.java``. Mitigation: upgrade to `3.1.22-1` or later.
AI summary snake-internal / snake-material-v2
A vulnerability tracked as **DEBIAN-CVE-2026-33306** has been found in ruby-bcrypt.
Attackers can target a specific entry point like ``BCrypt.java`` over the network to misuse the product.
Risk of unauthorized operations or information disclosure. CVSS score: ?/10.
What to do: upgrade ruby-bcrypt to **3.1.22-1** or later.
If unsure, ask your IT team or search "ruby-bcrypt DEBIAN-CVE-2026-33306" on the vendor's site.
DEBIAN-CVE-2026-33306 (ruby-bcrypt) —
Attack surface: `BCrypt.java` / `checkpw`
Patched: `3.1.22-1` — 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** (unclassified) exists in ruby-bcrypt. Attackers reach the vulnerable code path via ``BCrypt.java`` without authentication.
📍 Affected scope
ruby-bcrypt — . Attack surface: `BCrypt.java` / `checkpw`.
🔥 Severity
Severity: ?. Risk of unauthorized operations or information disclosure
🔧 How to fix
Update to **3.1.22-1**.
🛡️ 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 request patterns matching this CVE's known IOCs. Run `grep -r 'ruby-bcrypt' .` 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 'ruby-bcrypt' . | 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 `ruby-bcrypt` を grep し、稼働しているサービス・バージョンを把握する。
-
6Apply patch patch
Upgrade ruby-bcrypt to 3.1.22-1ステージング環境で 3.1.22-1 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
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
Debian:11
ruby-bcrypt
[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}]
Debian:12
ruby-bcrypt
[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}]
Debian:13
ruby-bcrypt
[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}]
Debian:14
ruby-bcrypt
[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"3.1.22-1"}]}]