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CVE-2026-31503
medium
CVSS 5.5
Vulnerability in c (CVE-2026-31503)
Summary
vulnerability in c (CVE-2026-31503). Risk of unauthorized operations or information disclosure.
AI summary snake-internal / snake-material-v2
A vulnerability tracked as **CVE-2026-31503** has been found in c.
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 "c CVE-2026-31503" on the vendor's site.
CVE-2026-31503 (c) — 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
**A vulnerability** (unclassified) exists in c.
📍 Affected scope
c — .
🔥 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 'c' .` 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 'c' . | 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 `c` 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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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://git.kernel.org/stable/c/0a360f7f73a06ac88f18917055fbcc79694252d7
- web https://git.kernel.org/stable/c/18d84c45def3671d5c89fbdd5d4ab8a3217fe4b4
- web https://git.kernel.org/stable/c/2297e38114316b26ae02f2d205c49b5511c5ed55
- web https://git.kernel.org/stable/c/d6ace0dbcbb7fd285738bb87b42b71b01858c952
- web https://git.kernel.org/stable/c/e537dd15d0d4ad989d56a1021290f0c674dd8b28
- web https://git.kernel.org/stable/c/f1bed05a832ae79be5f7a105da56810eaa59a5f1
- web https://cert-portal.siemens.com/productcert/html/ssa-019113.html
- web https://cert-portal.siemens.com/productcert/html/ssa-082556.html
- web https://nvd.nist.gov/vuln/detail/CVE-2026-31503
- web https://github.com/advisories/GHSA-8g49-x5x5-4c9c