CVE-2026-53917
published 2026-06-30CVE-2026-53917: Memory Allocation with Excessive Size Value vulnerability in Apache ActiveMQ, Apache ActiveMQ All, Apache ActiveMQ Client, Apache ActiveMQ Broker. An…
PriorityP344high7.5CVSS 3.1
AVNACLPRNUINSUCNINAH
EPSS
0.80%
52.3th percentile
Memory Allocation with Excessive Size Value vulnerability in Apache ActiveMQ, Apache ActiveMQ All, Apache ActiveMQ Client, Apache ActiveMQ Broker.
An authenticated user can cause a broker DoS by sending a crafted OpenWire Message with a large encoded size value for the map. OpenWire message property maps are unmarshaled without size validation which can trigger OOM and crash the broker.
This issue affects Apache ActiveMQ: before 5.19.8, from 6.0.0 before 6.2.7; Apache ActiveMQ All: before 5.19.8, from 6.0.0 before 6.2.7; Apache ActiveMQ Client: before 5.19.8, from 6.0.0 before 6.2.7; Apache ActiveMQ Broker: before 5.19.8, from 6.0.0 before 6.2.7.
Users are recommended to upgrade to version 6.2.7 or 5.19.8, which fixes the issue.
Affected
15 ranges
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| apache | activemq | < 5.19.8 | 5.19.8 |
| apache | activemq | >= 6.0.0 < 6.2.7 | 6.2.7 |
| apache | activemq_broker | < 5.19.8 | 5.19.8 |
| apache | activemq_broker | >= 6.0.0 < 6.2.7 | 6.2.7 |
| apache_software_foundation | apache_activemq | < 5.19.8 | 5.19.8 |
| apache_software_foundation | apache_activemq | >= 6.0.0 < 6.2.7 | 6.2.7 |
| apache_software_foundation | apache_activemq_all | < 5.19.8 | 5.19.8 |
| apache_software_foundation | apache_activemq_all | >= 6.0.0 < 6.2.7 | 6.2.7 |
| apache_software_foundation | apache_activemq_broker | < 5.19.8 | 5.19.8 |
| apache_software_foundation | apache_activemq_broker | >= 6.0.0 < 6.2.7 | 6.2.7 |
| apache_software_foundation | apache_activemq_client | < 5.19.8 | 5.19.8 |
| apache_software_foundation | apache_activemq_client | >= 6.0.0 < 6.2.7 | 6.2.7 |
| candlepinproject | candlepin | — | — |
| log4j_2 | log4j | — | — |
| satellite_el8 | candlepin | — | — |
CVSS provenance
nvdv3.17.5HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
vendor_redhat7.5HIGH
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VulDB
Apache ActiveMQ up to 5.19.7/6.2.6 OpenWire allocation of resources (EUVD-2026-40277)
vuldb·2026-07-04·CVSS 7.5
CVE-2026-53917 [HIGH] Apache ActiveMQ up to 5.19.7/6.2.6 OpenWire allocation of resources (EUVD-2026-40277)
A vulnerability classified as problematic has been found in Apache ActiveMQ up to 5.19.7/6.2.6. This impacts an unknown function of the component OpenWire. This manipulation causes allocation of resources.
The identification of this vulnerability is CVE-2026-53917. It is possible to initiate the attack remotely. There is no exploit available.
It is recommended to upgrade the affected component.
GHSA
Memory Allocation with Excessive Size Value vulnerability in Apache ActiveMQ, Apache ActiveMQ All, Apache ActiveMQ Client, Apache ActiveMQ Broker.
ghsa_unreviewed·2026-06-30
CVE-2026-53917 [HIGH] CWE-789 Memory Allocation with Excessive Size Value vulnerability in Apache ActiveMQ, Apache ActiveMQ All, Apache ActiveMQ Client, Apache ActiveMQ Broker.
Memory Allocation with Excessive Size Value vulnerability in Apache ActiveMQ, Apache ActiveMQ All, Apache ActiveMQ Client, Apache ActiveMQ Broker.
An authenticated user can cause a broker DoS by sending a crafted OpenWire Message with a large encoded size value for the map. OpenWire message property maps are unmarshaled without size validation which can trigger OOM and crash the broker.
This issue affects Apache ActiveMQ: before 5.19.8, from 6.0.0 before 6.2.7; Apache ActiveMQ All: before 5.19.8, from 6.0.0 before 6.2.7; Apache ActiveMQ Client: before 5.19.8, from 6.0.0 before 6.2.7; Apache ActiveMQ Broker: before 5.19.8, from 6.0.0 before 6.2.7.
Users are recommended to upgrade to version 6.2.7 or 5.19.8, which fixes the issue.
Red Hat
activemq: activemq-all: activemq-client: activemq-broker: Apache ActiveMQ: Denial of Service via crafted OpenWire Message
vendor_redhat·2026-06-30·CVSS 7.5
CVE-2026-53917 [HIGH] CWE-770 activemq: activemq-all: activemq-client: activemq-broker: Apache ActiveMQ: Denial of Service via crafted OpenWire Message
activemq: activemq-all: activemq-client: activemq-broker: Apache ActiveMQ: Denial of Service via crafted OpenWire Message
A flaw was found in Apache ActiveMQ. An authenticated user can exploit this vulnerability by sending a specially crafted OpenWire Message with an excessively large encoded size value for the message property map. This lack of size validation during unmarshaling can lead to an out-of-memory error, causing the broker to crash and resulting in a Denial of Service (DoS).
Statement: Red Hat products ship Apache ActiveMQ Classic components as transitive dependencies. The vulnerability is in the OpenWire message property map unmarshalling code in activemq-client, which does not validate encoded size values, allowing an authenticated attacker to trigger OOM. While AMQ Broker
No detection rules found.
No public exploits indexed.
Bugzilla
CVE-2026-53917 activemq-cpp: Apache ActiveMQ: Denial of Service via crafted OpenWire Message [epel-all]
bugzilla·2026-06-30·CVSS 7.5
CVE-2026-53917 [HIGH] CVE-2026-53917 activemq-cpp: Apache ActiveMQ: Denial of Service via crafted OpenWire Message [epel-all]
CVE-2026-53917 activemq-cpp: Apache ActiveMQ: Denial of Service via crafted OpenWire Message [epel-all]
Disclaimer: Community trackers are created by Red Hat Product Security team on a best effort basis. Package maintainers are required to ascertain if the flaw indeed affects their package, before starting the update process.
Memory Allocation with Excessive Size Value vulnerability in Apache ActiveMQ, Apache ActiveMQ All, Apache ActiveMQ Client, Apache ActiveMQ Broker.
An authenticated user can cause a broker DoS by sending a crafted OpenWire Message with a large encoded size value for the map. OpenWire message property maps are unmarshaled without size validation which can trigger OOM and crash the broker.
This issue affects Apache ActiveMQ: before 5.19.8, from 6.0.0 before 6.2.7; Apa
Bugzilla
CVE-2026-53917 activemq: activemq-all: activemq-client: activemq-broker: Apache ActiveMQ: Denial of Service via crafted OpenWire Message
bugzilla·2026-06-30·CVSS 7.5
CVE-2026-53917 [HIGH] CVE-2026-53917 activemq: activemq-all: activemq-client: activemq-broker: Apache ActiveMQ: Denial of Service via crafted OpenWire Message
CVE-2026-53917 activemq: activemq-all: activemq-client: activemq-broker: Apache ActiveMQ: Denial of Service via crafted OpenWire Message
Memory Allocation with Excessive Size Value vulnerability in Apache ActiveMQ, Apache ActiveMQ All, Apache ActiveMQ Client, Apache ActiveMQ Broker.
An authenticated user can cause a broker DoS by sending a crafted OpenWire Message with a large encoded size value for the map. OpenWire message property maps are unmarshaled without size validation which can trigger OOM and crash the broker.
This issue affects Apache ActiveMQ: before 5.19.8, from 6.0.0 before 6.2.7; Apache ActiveMQ All: before 5.19.8, from 6.0.0 before 6.2.7; Apache ActiveMQ Client: before 5.19.8, from 6.0.0 before 6.2.7; Apache ActiveMQ Broker: before 5.19.8, from 6.0.0 before 6.2.7.
Users
Bugzilla
CVE-2026-53917 activemq-cpp: Apache ActiveMQ: Denial of Service via crafted OpenWire Message [fedora-all]
bugzilla·2026-06-30·CVSS 7.5
CVE-2026-53917 [HIGH] CVE-2026-53917 activemq-cpp: Apache ActiveMQ: Denial of Service via crafted OpenWire Message [fedora-all]
CVE-2026-53917 activemq-cpp: Apache ActiveMQ: Denial of Service via crafted OpenWire Message [fedora-all]
Disclaimer: Community trackers are created by Red Hat Product Security team on a best effort basis. Package maintainers are required to ascertain if the flaw indeed affects their package, before starting the update process.
Memory Allocation with Excessive Size Value vulnerability in Apache ActiveMQ, Apache ActiveMQ All, Apache ActiveMQ Client, Apache ActiveMQ Broker.
An authenticated user can cause a broker DoS by sending a crafted OpenWire Message with a large encoded size value for the map. OpenWire message property maps are unmarshaled without size validation which can trigger OOM and crash the broker.
This issue affects Apache ActiveMQ: before 5.19.8, from 6.0.0 before 6.2.7; A
Hackernews
⚡ Weekly Recap: Proxy Botnets, Browser Ransomware, AI Agent Tricks, Fake PoC Malware and More
blogs_hackernews·2026-07-06
CVE-2026-48276 ⚡ Weekly Recap: Proxy Botnets, Browser Ransomware, AI Agent Tricks, Fake PoC Malware and More
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## ⚡ Weekly Recap: Proxy Botnets, Browser Ransomware, AI Agent Tricks, Fake PoC Malware and More
A streaming box should not need a threat model. Neither should a username field, a demo repo, a reset flow, or a browser permission prompt. That is the irritating part this week: the risky pieces were ordinary.
Home devices became a routing cover. Clean code pulled dirt from a dependency. Identity shortcuts aged badly. AI systems trusted the wrong instructions. Same soft spot throughout: trust placed one layer too early.
Below is the full recap, since this is apparently what counted as a normal week.
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2026-06-30
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