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CVE-2026-6891
medium
CVSS 5.0
Vulnerability in jvn (CVE-2026-6891)
Summary
vulnerability in jvn (CVE-2026-6891). Data can be tampered with by attackers.
AI summary snake-internal / snake-material-v2
A vulnerability tracked as **CVE-2026-6891** has been found in jvn.
Data can be tampered with by attackers. CVSS score: 5.0/10.
What to do: apply the vendor's official patched release.
If unsure, ask your IT team or search "jvn CVE-2026-6891" on the vendor's site.
CVE-2026-6891 (jvn) — CWE-59 / CVSS v3 5.0
Attack vector: local
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-59) exists in jvn.
📍 Affected scope
jvn — .
🔥 Severity
Severity: Medium (CVSS 5.0/10). Data can be tampered with by attackers
🔧 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. Run `grep -r 'jvn' .` 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 'jvn' . | 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 `jvn` を grep し、稼働しているサービス・バージョンを把握する。
-
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
- JVN JVNDB-2026-017322
- web f98c90f0-e9bd-4fa7-911b-51993f3571fd
- web f98c90f0-e9bd-4fa7-911b-51993f3571fd
- web f98c90f0-e9bd-4fa7-911b-51993f3571fd
- web f98c90f0-e9bd-4fa7-911b-51993f3571fd
- web https://nvd.nist.gov/vuln/detail/CVE-2026-6891
- web https://psirt.canon/advisory-information/cp2026-004
- web https://www.canon-europe.com/support/product-security
- web https://github.com/advisories/GHSA-q9wc-hhm5-fjq7