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CVE-2026-31790
high
CVSS 7.5
Vulnerability in openssl (CVE-2026-31790)
Summary
vulnerability in openssl (CVE-2026-31790). Confidential information can be exposed externally.
AI summary snake-internal / snake-material-v2
A vulnerability tracked as **CVE-2026-31790** has been found in openssl.
Confidential information can be exposed externally. CVSS score: 7.5/10.
What to do: apply the vendor's official patched release.
If unsure, ask your IT team or search "openssl CVE-2026-31790" on the vendor's site.
CVE-2026-31790 (openssl) — CWE-754 / CVSS v3 7.5
Attack vector: remote (network-reachable) / unauthenticated / 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** (CWE-754) exists in openssl.
📍 Affected scope
openssl — .
🔥 Severity
Severity: High (CVSS 7.5/10). Confidential information can be exposed externally
🔧 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 'openssl' .` 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
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1Identify exposure identify
grep -r 'openssl' . | 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 `openssl` 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://github.com/openssl/openssl/commit/001e01db3e996e13ffc72386fe79d03a6683b5ac
- web https://github.com/openssl/openssl/commit/abd8b2eec7e3f3fda60ecfb68498b246b52af482
- web https://github.com/openssl/openssl/commit/b922e24e5b23ffb9cb9e14cadff23d91e9f7e406
- web https://github.com/openssl/openssl/commit/d5f8e71cd0a54e961d0c3b174348f8308486f790
- web https://github.com/openssl/openssl/commit/eed200f58cd8645ed77e46b7e9f764e284df379e
- web https://openssl-library.org/news/secadv/20260407.txt
- web https://cert-portal.siemens.com/productcert/html/ssa-032379.html
- web https://nvd.nist.gov/vuln/detail/CVE-2026-31790
- web https://github.com/advisories/GHSA-vgxx-5xj5-q97x