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CVE-2026-47241
Vulnerability in net-imap (CVE-2026-47241)
Summary
vulnerability in net-imap (CVE-2026-47241). Risk of unauthorized operations or information disclosure. Exploitable via ``criteria``. Mitigation: upgrade to `0.5.15` or later.
AI summary snake-internal / snake-material-v2
A vulnerability tracked as **CVE-2026-47241** has been found in net-imap.
Attackers can target a specific entry point like ``criteria`` over the network to misuse the product.
Risk of unauthorized operations or information disclosure. CVSS score: ?/10.
What to do: upgrade net-imap to **0.5.15** or later.
If unsure, ask your IT team or search "net-imap CVE-2026-47241" on the vendor's site.
CVE-2026-47241 (net-imap) — CWE-162 /
Attack surface: `criteria` / `attr` / `search_keys` / `BAD`
Patched: `0.5.15` — 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-162) exists in net-imap. Attackers reach the vulnerable code path via ``criteria`` without authentication.
📍 Affected scope
net-imap — . Attack surface: `criteria` / `attr` / `search_keys` / `BAD`.
🔥 Severity
Severity: ?. Risk of unauthorized operations or information disclosure
🔧 How to fix
Update to **0.5.15**.
🛡️ 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 'net-imap' .` 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 'net-imap' . | 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 `net-imap` 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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6Apply patch patch
Upgrade net-imap to 0.5.15ステージング環境で 0.5.15 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
net-imap
[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0.5.15"}]}]
References
- package https://github.com/ruby/net-imap
- web https://github.com/ruby/net-imap/security/advisories/GHSA-c4fp-cxrr-mj66
- web https://github.com/ruby/net-imap/releases/tag/v0.6.4.1
- web https://github.com/advisories/GHSA-c4fp-cxrr-mj66
- web https://nvd.nist.gov/vuln/detail/CVE-2026-47241
- web https://github.com/rubysec/ruby-advisory-db/blob/master/gems/net-imap/CVE-2026-47241.yml
- web https://www.cve.org/CVERecord?id=CVE-2026-47241