Apache ActiveMQ before 5.6.0 allows remote attackers to cause a denial of service (file-descriptor exhaustion and broker crash or hang) by s
Apache ActiveMQ before 5.6.0 allows remote attackers to cause a denial of service (file-descriptor exhaustion and broker crash or hang) by sending many openwire failover:tcp:// connection requests.
- Published
- Jan 5, 2012
- Updated
- Jun 16, 2026
- EPSS
- 8.4% · 95th percentile
- CWE
- CWE-399
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Report tools
Action score
23
Monitor
Low priority for now.
- CVSS
- 20 / 40 · 5.0 / 10
- CISA KEV
- 0 / 30 · Not listed
- EPSS
- 3 / 30 · 8.4%
Affected systems
| Vendor | Product | CPE |
|---|---|---|
| apache | activemq | cpe:2.3:a:apache:activemq |
Affected versions
NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.
- apache activemqup to 5.5.1 inclusive
- apache activemq1.1
- apache activemq1.2
- apache activemq1.3
- apache activemq1.4
- apache activemq1.5
- apache activemq2.0
- apache activemq2.1
- apache activemq3.0
- apache activemq3.1
- apache activemq3.2
- apache activemq3.2.1
- apache activemq3.2.2
- apache activemq4.0
- apache activemq4.0.1
- apache activemq4.0.2
- apache activemq4.1.0
- apache activemq4.1.1
- apache activemq4.1.2
- apache activemq5.0.0
Package-level exposure
OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.
| Ecosystem | Package | Affected range | Fix |
|---|---|---|---|
| Debian:12 | activemq | before 5.5.0+dfsg-5 | 5.5.0+dfsg-5 |
| Maven | org.apache.activemq:activemq-core | before 5.6.0 | 5.6.0 |
Same product
apache: all recordsOther highest-scoring records for the same primary product.
- CVE-2023-46604Apache ActiveMQ, Apache ActiveMQ Legacy OpenWire Module: Unbounded deserialization causes ActiveMQ to be vulnerable to a remote code execution (RCE) attackKEV99Now
- CVE-2016-3088The Fileserver web application in Apache ActiveMQ 5.x before 5.14.0 allows remote attackers to upload and execute arbitrary files via an HTTKEV99Now
- CVE-2026-34197Apache ActiveMQ Broker, Apache ActiveMQ All, Apache ActiveMQ: Authenticated users could perform RCE via Jolokia MBeansKEV70This week
- CVE-2022-41678Apache ActiveMQ: Insufficient API restrictions on Jolokia allow authenticated users to perform RCE61This week
- CVE-2020-11998A regression has been introduced in the commit preventing JMX re-bind.54Plan
- CVE-2015-5254Apache ActiveMQ 5.x before 5.13.0 does not restrict the classes that can be serialized in the broker, which allows remote attackers to execu50Plan
Remediation
Which version to upgrade to
Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.
| Product / package | Fixed version | Source |
|---|---|---|
| debian:activemq | 5.5.0+dfsg-5 · Debian:12 | Package registry (OSV) |
| Maven:org.apache.activemq:activemq-core | 5.6.0 | Package registry (OSV) |
Exploit status
No known public exploit
No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.
Research context
For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.
Timeline
From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.
No dated events beyond publication.
FIRST EPSS daily score; only changes of 0.01 or more are recorded (step chart).
Patch and commit links
Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.
No commit or PR link among the references.
Credits
All researchersFinders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.
No credits in the CNA record.
Variant candidates
Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.
No nightly-computed relations.
Chain candidates
An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.
—
Bug bounty scope
No known public program.
Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).
Technical details
Attack conditions
- No special conditions are required; it is repeatable.
If successful
- Confidentiality
- none
- Integrity
- none
- Availability
- P · the service can be disrupted
- Attack complexity
- Low
- Confidentiality impact
- None
- Integrity impact
- None
- Availability impact
- P
Weakness class (CWE)
CWE-399 · Resource Management ErrorsCVSS vector
AV:N/AC:L/Au:N/C:N/I:N/A:P
nvd-primary
Attack context
MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.
MITRE has no CAPEC/ATT&CK mapping for this CWE.
Noroxi analysis
No Noroxi analysis for this record yet
We don't hand-write analysis for all 385,000+ vulnerabilities; that wouldn't be honest. For notable, high-impact vulnerabilities our team writes the mechanism, detection and remediation steps.
We use this product, ask for helpChange log
- Fix✗ → ✓
For records you follow, these changes also arrive as notifications. →
References
- openwall.com/lists/oss-security/2011/12/25/2
- openwall.com/lists/oss-security/2011/12/25/6
- secunia.com/advisories/47112
- svn.apache.org/viewvc?view=revision&revision=1209700
- svn.apache.org/viewvc?view=revision&revision=1211844
- www.securityfocus.com/bid/50904
Vendor advisories and official records. Exploit/PoC links are deliberately left out.