AEGLIX vulnerability intelligence
CVE-2026-39304
HIGH · CVSS 7.5 · Modified
Published: 2026-04-10 · Updated: 2026-10-26 · Source: NVD
Stored catalog record
Source record retrieved 2026-10-28T10:18:46.250891+00:00. Scheduled imports handle updates; this page does not assert that the provider was queried just now.
Vulnerability overview
Denial of Service via Out of Memory vulnerability in Apache ActiveMQ Client, Apache ActiveMQ Broker, Apache ActiveMQ. ActiveMQ NIO SSL transports do not correctly handle TLSv1.3 handshake KeyUpdates triggered by clients. This makes it possible for a client to rapidly trigger updates which causes the broker to exhaust all its memory in the SSL engine leading to DoS. Note: TLS versions before TLSv1.3 (such as TLSv1.2) are broken but are not vulnerable to OOM. Previous TLS versions require a full handshake renegotiation which causes a connection to hang but not OOM. This is fixed as well. This issue affects Apache ActiveMQ Client: before 5.19.4, from 6.0.0 before 6.2.4; Apache ActiveMQ Broker: before 5.19.4, from 6.0.0 before 6.2.4; Apache ActiveMQ: before 5.19.4, from 6.0.0 before 6.2.4. Users are recommended to upgrade to version 6.2.4 or 5.19.5, which fixes the issue.
Patch review priority
Assess exposure and vendor guidance
- No higher-priority signal is available in the current stored evidence.
FIRST EPSS: 0.90% · percentile 59.4 · score date 2026-10-27.
EPSS estimates probability of exploitation in the next 30 days. It does not measure your exposure or prove exploitation. The elevated threshold is 10%; CISA KEV takes precedence. About FIRST EPSS ↗
Severity and scoring
- CVSS score
- 7.5 · HIGH
- CVSS version
- 3.1
- CVSS vector
- CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- Weaknesses
- CWE-400, CWE-770
CVSS measures technical severity; it does not establish whether this vulnerability is being exploited in your environment.
Known exploitation and remediation
Not listed in the CISA catalog retrieved for this record. This does not establish that exploitation has not occurred.
Verify affected versions and patch availability in the vendor advisory before making changes.
Affected products and versions
cpe:2.3:a:apache:activemq:*:*:*:*:*:*:*:*
Before (exclusive): 5.19.4
cpe:2.3:a:apache:activemq:*:*:*:*:*:*:*:*
From (inclusive): 6.0.0
Before (exclusive): 6.2.4
cpe:2.3:a:apache:activemq_broker:*:*:*:*:*:*:*:*
Before (exclusive): 5.19.4
cpe:2.3:a:apache:activemq_broker:*:*:*:*:*:*:*:*
From (inclusive): 6.0.0
Before (exclusive): 6.2.4
These are NVD CPE applicability entries. Some products depend on configuration conditions; consult the official record to confirm applicability.
Advisories and references
- https://activemq.apache.org/security-advisories.data/CVE-2026-39304-announcement.txt
Vendor Advisory
- http://www.openwall.com/lists/oss-security/2026/04/09/17
Mailing List · Third Party Advisory
- https://access.redhat.com/security/cve/CVE-2026-39304
- https://bugzilla.redhat.com/show_bug.cgi?id=2457275
- https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-39304.json