Exploited CVEs / Apache / CVE-2026-34197
CVE-2026-34197
Apache ActiveMQ Improper Input Validation Vulnerability. Exploitation in the wild is confirmed by CISA, not predicted. Federal agencies were required to remediate by 2026-04-30 (that deadline has passed); treat that date as the outer bound for your own environment. Check the vendor security advisory for the fix.
Actively exploited Apache ActiveMQ vulnerability, High severity, CVSS 8.8. Added to the CISA KEV catalog 2026-04-16.
Risk summary
Updated July 27, 2026. Data refreshed on every build from MSRC, CISA KEV, and FIRST EPSS.
Senserva AI Opinion for CVE-2026-34197
Apache ActiveMQ has a history of being mass-exploited within days of a flaw going public, and this improper input validation bug allowing code injection fits the pattern with a 97% EPSS score. It is rated High Severity at CVSS 8.8 and was confirmed exploited on 2026-04-16. Message brokers frequently listen on internal networks with little hardening, and they connect directly to core business applications.
Do this: Upgrade ActiveMQ brokers now and firewall broker ports so only known producers and consumers can reach them.
AI-generated from public data, 2026-07-07. Verify against the vendor advisory before acting.
Senserva AI Opinion and rich prompt for CVE-2026-34197
Copy this prompt into Claude, ChatGPT, or Copilot. The facts are included, sourced from this page.
Full tracking and change history for CVE-2026-34197
Published and last-revised dates are authoritative, from Microsoft MSRC (or the CISA KEV date-added). Senserva additionally records day-to-day changes from 2026-07-07, refreshed several times a day; the change count reflects that forward-only tracking.
CISA required action
Federal (BOD 22-01) remediation due date: 2026-04-30 (past due).
Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.
Official fix for CVE-2026-34197
Check the vendor's security advisory channel for the patched ActiveMQ versions and workarounds.
Common questions about CVE-2026-34197
Is CVE-2026-34197 actively exploited?
Yes. CVE-2026-34197 was added to the CISA Known Exploited Vulnerabilities (KEV) catalog on 2026-04-16, which means exploitation in the wild has been confirmed, not predicted. Its EPSS 30-day exploitation probability is 97%.
What is the CISA deadline and required action for CVE-2026-34197?
CISA set the federal (BOD 22-01) remediation due date at 2026-04-30, which has passed; treat any unremediated system as overdue. The verbatim required action: Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.
What fixes CVE-2026-34197?
Check the vendor's security advisory for the patched ActiveMQ versions and any workarounds. KEV listing makes this a fix-first item: patch it ahead of higher-CVSS issues nobody is exploiting.
Can I ask my own AI about CVE-2026-34197?
Yes. This page includes a free, ready-to-paste AI prompt containing CVE-2026-34197's key facts: severity, CVSS, EPSS, the KEV date, the CISA due date, and the required action. Copy it into Claude, ChatGPT, or Copilot; the data is refreshed twice a day (5 AM and 3 PM US Central).
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Authoritative references
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