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CVE-2026-82021
high
CVSS 8.3
Vulnerability in CVE-2026-82021 (CVE-2026-82021)
Summary
vulnerability in CVE-2026-82021 (CVE-2026-82021). Successful exploitation can lead to full system takeover.
AI summary snake-internal / snake-material-v2
A vulnerability tracked as **CVE-2026-82021** has been found in CVE-2026-82021.
Successful exploitation can lead to full system takeover. CVSS score: 8.3/10.
What to do: apply the vendor's official patched release.
If unsure, ask your IT team or search "CVE-2026-82021 CVE-2026-82021" on the vendor's site.
CVE-2026-82021 (CVE-2026-82021) — CWE-494 / CVSS v3 8.3
Attack vector: remote (network-reachable) / unauthenticated
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-494) exists in CVE-2026-82021.
📍 Affected scope
CVE-2026-82021 — .
🔥 Severity
Severity: High (CVSS 8.3/10). Successful exploitation can lead to full system takeover
🔧 How to fix
Update to the patched release per vendor advisory.
🛡️ 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. Audit SBOM/dependencies to find affected services.
Response Actions (7 steps)
Concrete steps and command examples for SOC/SRE teams to execute in order
-
1Identify exposure identify
Audit SBOM/dependencies for affected components.依存マニフェストで影響コンポーネントを特定する。
-
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。
References
- web https://github.com/NousResearch/hermes-agent/commit/9df5f879b4a5925c0f8f947e7e16ed8e845932c3
- web https://github.com/NousResearch/hermes-agent/pull/64463
- web https://github.com/NousResearch/hermes-agent/releases/tag/v2026.7.20
- web https://www.vulncheck.com/advisories/hermes-agent-mcp-catalog-supply-chain-rce-via-mutable-branch-reference
- web https://nvd.nist.gov/vuln/detail/CVE-2026-82021
- web https://github.com/advisories/GHSA-w9gw-vgmg-q67h