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CVE-2026-47065 critical CVSS 9.8

Unsafe Deserialization in org.apache.mina:mina-core (CVE-2026-47065)

Summary

Vulnerability in org.apache.mina:mina-core (CVE-2026-47065). Successful exploitation can lead to full system takeover. Mitigation: upgrade to 2.0.29 or later.

Original description

The description as published by the source.

ZDRES-232: resolveProxyClass Not Overridden - acceptMatchers Filter Bypass via java.lang.reflect.Proxy

Assessment: Fully addressed.

When the serialised stream contains a TC_PROXYCLASSDESC (the marker
for a java.lang.reflect.Proxy ), JDK’s ObjectInputStream.readProxyDesc()
is
dispatched. JDK then calls the default
ObjectInputStream.resolveProxyClass(interfaces) implementation, which
performs Class.forName(intf, false, latestUserDefinedLoader()) for EACH
interface name and constructs the proxy class — bypassing the accepted
classes list .

ZDRES-233: Class.forName(name, initialize=true, classLoader) in
readClassDescriptor Triggers Static Initialiser of Allow-Listed Classes

Assessment: Fully addressed.

For ANY class on the allow-list, deserialising a stream that names it triggers the class’s
(static initialiser) BEFORE any instance is constructed. This means an
attacker who supplies a class name on the allow-list (e.g., the
developer wrote accept(“com.myapp.*") , attacker supplies
com.myapp.SomeClass ) causes of SomeClass — and many
real-world classes have side-effecting static initialisers

Both issues have been fixed.

Source: NIST National Vulnerability Database NVD GitHub Advisory

Auto-generated summary

Assembled by SecPulse from the source data (CVSS, CWE, affected versions) using templates — no AI involved. Check the original description and references below for exact details.

A vulnerability tracked as CVE-2026-47065 has been found in org.apache.mina:mina-core.
Successful exploitation can lead to full system takeover. CVSS score: 9.8/10.
What to do: upgrade org.apache.mina:mina-core to 2.0.29 or later.
If unsure, ask your IT team or search "org.apache.mina:mina-core CVE-2026-47065" on the vendor's site.

CVE-2026-47065 (org.apache.mina:mina-core) — CWE-502 / CVSS v3 9.8
Attack vector: remote (network-reachable) / unauthenticated / no user interaction
Patched: 2.0.29 — 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 org.apache.mina:mina-core.

📍 Affected scope

Check the vendor advisory for the affected versions of org.apache.mina:mina-core.

🔥 Severity

Severity: Critical (CVSS 9.8/10). Successful exploitation can lead to full system takeover.

🔧 How to fix

Update to 2.0.29.

🛡️ 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. Audit SBOM/dependencies to find affected services.

Response actions

Concrete steps and command examples for SOC/SRE teams to execute in order

  1. 1
    Identify exposure identify 
    Audit SBOM/dependencies for affected components.

    資産台帳・SBOM・依存マニフェストで org.apache.mina:mina-core を使っているサービスとバージョンを洗い出す。

  2. 2
    Apply patch patch 
    Upgrade org.apache.mina:mina-core to 2.0.29

    ステージング環境で 2.0.29 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を含めること。

  3. 3
    Post-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。本番ではアクセスログ・WAF でアラート再発が無いか継続監視。

Affected packages

maven org.apache.mina:mina-core
[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.0.29"}]}]

Fix status by distribution

Fixed packages published by each distribution for this CVE

References

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