Event Monitor Cyber
EM-20261104-1UKB VulnerabilityHigh severity

Apache NMS ActiveMQ Vulnerability (CVE-2026-103582)

CVE-2026-103582

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Status
Developing

Since : signals keep joining.

First Signal
Nov 04 10:16 UTCC41 Red Hat Security Data
Page Born
Nov 04 11:17 UTCsecond source joined
Last Signal
Nov 04 11:17 UTC7 days before snapshot
Sources
21 official · 1 research, news or crowd
Open For
6 daysso far

Life Of This Page

  1. 1
    Born
    A second, independent source names it.
  2. 2
    Developing · Now
    New signals join; severity can move.
  3. 3
    Confirmed
    Not yet
    CISA KEV lists it, or exploitation in the wild is reported.
  4. 4
    Resolved
    Not yet
    Past the fix deadline and 14 days with no new signal.
  5. 5
    Archived
    Not yet
    30 days after resolved. Read only; the link keeps working. Reopens if it comes back.

The ID never changes, and earlier addresses keep working. A correction is logged, never overwritten. If two pages turn out to be one incident, the later one points to the earlier.

Vulnerability Lifecycle

  1. Disclosed: reached
    Nov 04 11:17 UTC
    C6 NVD published
  2. Scored: reached
    Nov 04 11:17 UTC
    CVSS 7.5 · EPSS 0.2%
  3. Exploited: not yet
    Not yet
    No exploitation reported
  4. Advisories: not yet
    Not yet
    None yet
  5. Vendor Response: reached
    Nov 04 10:16 UTC
    C41 published
  6. Resolved: not yet
    Not yet
    After 14 quiet days

Timeline

06:0012:0018:00BornC41 Red Hat Security DataC6 NVD CVE API 2.0

Point at a mark to read it. Squares are signals, colored by severity; every one is also listed under Signals.

Signals

  1. CVE-2026-103582 (CVSS 7.5) (opens source in a new tab) Unbounded memory allocation and missing frame size validation in Apache NMS ActiveMQ (the .NET OpenWire client, package Apache.NMS.ActiveMQ) before 2.3.0. The OpenWire unmarshalling code trusted the frame size and… High severityDatabaseC6 NVD CVE API 2.0
  2. Red Hat: CVE-2026-103582 (moderate) (opens source in a new tab) Apache.NMS.ActiveMQ: Apache NMS ActiveMQ: Denial of Service via crafted OpenWire frames Med severityVendorC41 Red Hat Security Data