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CVE-2026-32935 medium CVSS 5.9

Vulnerability in phpseclib/phpseclib (CVE-2026-32935)

Summary

vulnerability in phpseclib/phpseclib (CVE-2026-32935). Confidential information can be exposed externally. Mitigation: upgrade to `1.0.27` or later.

AI summary snake-internal / snake-material-v2

A vulnerability tracked as **CVE-2026-32935** has been found in phpseclib/phpseclib. Confidential information can be exposed externally. CVSS score: 5.9/10. What to do: upgrade phpseclib/phpseclib to **1.0.27** or later. If unsure, ask your IT team or search "phpseclib/phpseclib CVE-2026-32935" on the vendor's site.
CVE-2026-32935 (phpseclib/phpseclib) — CWE-208 / CVSS v3 5.9 Attack vector: remote (network-reachable) / unauthenticated / no user interaction Patched: `1.0.27` — apply immediately Workaround: Use AES in CTR, CFB or OFB modes 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-208) exists in phpseclib/phpseclib.
📍 Affected scope
phpseclib/phpseclib — .
🔥 Severity
Severity: Medium (CVSS 5.9/10). Confidential information can be exposed externally
🔧 How to fix
Update to **1.0.27**.
🛡️ Workaround
Workaround: Use AES in CTR, CFB or OFB modes
🔍 Detection
Search webserver/proxy logs for unusual request patterns matching this CVE's known IOCs. Run `grep -r 'phpseclib/phpseclib' .` 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

  1. 1
    Identify exposure identify
    grep -r 'phpseclib/phpseclib' . | 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 `phpseclib/phpseclib` を grep し、稼働しているサービス・バージョンを把握する。

  2. 5
    Apply temporary workaround mitigate
    Use AES in CTR, CFB or OFB modes

    パッチが適用されるまでの応急処置として、Use AES in CTR, CFB or OFB modes を実施。回避策の副作用 (機能低下) を確認した上で。

  3. 6
    Apply patch patch
    Upgrade phpseclib/phpseclib to 1.0.27

    ステージング環境で 1.0.27 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。

  4. 7
    Post-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

composer phpseclib/phpseclib
[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.0.27"}]}]
Packagist phpseclib/phpseclib
[{"type":"ECOSYSTEM","events":[{"introduced":"0.1.1"},{"fixed":"1.0.27"}]}]

References

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