← Back
CVE-2026-4367
medium
CVSS 5.5
Out-of-Bounds Read in jvn (CVE-2026-4367)
Summary
vulnerability in jvn (CVE-2026-4367). Risk of unauthorized operations or information disclosure.
AI summary snake-internal / snake-material-v2
A vulnerability tracked as **CVE-2026-4367** has been found in jvn.
Risk of unauthorized operations or information disclosure. CVSS score: 5.5/10.
What to do: apply the vendor's official patched release.
If unsure, ask your IT team or search "jvn CVE-2026-4367" on the vendor's site.
CVE-2026-4367 (jvn) — CWE-125 / CVSS v3 5.5
Attack vector: local / no user interaction
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
**out-of-bounds read** (CWE-125) exists in jvn.
📍 Affected scope
jvn — .
🔥 Severity
Severity: Medium (CVSS 5.5/10). Risk of unauthorized operations or information disclosure
🔧 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-2026-000070
- web https://access.redhat.com/security/cve/CVE-2026-4367
- web https://bugzilla.redhat.com/show_bug.cgi?id=2448984
- web https://gitlab.freedesktop.org/xorg/lib/libxpm/-/commit/5448e1bd
- web https://seclists.org/oss-sec/2026/q2/192
- web http://www.openwall.com/lists/oss-security/2026/04/21/3
- web https://nvd.nist.gov/vuln/detail/CVE-2026-4367
- web https://github.com/advisories/GHSA-c2rx-36v4-qc8g
- web https://access.redhat.com/errata/RHSA-2026:30354
- web https://access.redhat.com/errata/RHSA-2026:47072