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CVE-2026-48853
Unsafe Deserialization in grpc (CVE-2026-48853)
Summary
vulnerability in grpc (CVE-2026-48853). Risk of unauthorized operations or information disclosure. Exploitable via ``Enum.map``. Mitigation: upgrade to `1.0.0` or later.
AI summary snake-internal / snake-material-v2
A vulnerability tracked as **CVE-2026-48853** has been found in grpc.
Attackers can target a specific entry point like ``Enum.map`` over the network to misuse the product.
Risk of unauthorized operations or information disclosure. CVSS score: ?/10.
What to do: upgrade grpc to **1.0.0** or later.
If unsure, ask your IT team or search "grpc CVE-2026-48853" on the vendor's site.
CVE-2026-48853 (grpc) — CWE-502 /
Attack surface: `Enum.map` / `Task.async` / `GRPC.Codec.Erlpack` / `codecs`
Patched: `1.0.0` — apply immediately
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
**unsafe deserialization** (CWE-502) exists in grpc. Attackers reach the vulnerable code path via ``Enum.map`` without authentication.
📍 Affected scope
grpc — . Attack surface: `Enum.map` / `Task.async` / `GRPC.Codec.Erlpack` / `codecs`.
🔥 Severity
Severity: ?. Risk of unauthorized operations or information disclosure
🔧 How to fix
Update to **1.0.0**.
🛡️ 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 'grpc' .` 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 'grpc' . | 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 `grpc` 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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6Apply patch patch
Upgrade grpc to 1.0.0ステージング環境で 1.0.0 に上げて回帰テスト → 本番反映。回帰テストはアプリの主要ハッピーパスと、Step 3 で見つけた異常検知の続報チェックを含めること。
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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。
Affected packages
erlang
grpc
[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.0.0"}]}]
References
- web https://cna.erlef.org/cves/CVE-2026-48853.html
- web https://github.com/elixir-grpc/grpc/commit/272a97a5ea1b46af1819f14a831fcf35fc91f992
- web https://github.com/elixir-grpc/grpc/security/advisories/GHSA-grp7-v8xh-rj7h
- web https://osv.dev/vulnerability/EEF-CVE-2026-48853
- web https://nvd.nist.gov/vuln/detail/CVE-2026-48853
- web https://github.com/elixir-grpc/grpc/pull/540
- web https://github.com/elixir-grpc/grpc/releases/tag/v1.0.0
- web https://github.com/advisories/GHSA-grp7-v8xh-rj7h