CVE-2026-39304
CVE.org · Published
- Record status
- Published
- Identifier year (not publication year)
- 2026
- Source publication
- Source updated
- Imported by cveboard
- Source snapshot
- cve_2026-10-24_midnight_baseline ·
CNA source text (English)
Apache ActiveMQ Client, Apache ActiveMQ Broker, Apache ActiveMQ All, Apache ActiveMQ: Incorrect handling of TLSv1.3 KeyUpdate can be exploited to cause DoS via OOM
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.
Scoped product and version facts
Fix information unknown; no fixed version is derived here. Missing information does not prove that no fix exists.
Exploitation unknown; this catalogue does not assess exploitation.
Apache ActiveMQ Client
- Vendor
- Apache Software Foundation
- Product
- Apache ActiveMQ Client
- Platforms
- Unknown
- Default status
unaffected- Package
- org.apache.activemq:activemq-client
- Package collection
- https://repo.maven.apache.org/maven2
| Version (version) | Status (status) | Version scheme (versionType) | Exclusive end (lessThan) | Inclusive end (lessThanOrEqual) | Status changes (at → status) |
|---|---|---|---|---|---|
| 0 | affected | semver | 5.19.4 | Unavailable | None listed |
| 6.0.0 | affected | semver | 6.2.4 | Unavailable | None listed |
Apache ActiveMQ Broker
- Vendor
- Apache Software Foundation
- Product
- Apache ActiveMQ Broker
- Platforms
- Unknown
- Default status
unaffected- Package
- org.apache.activemq:activemq-broker
- Package collection
- https://repo.maven.apache.org/maven2
| Version (version) | Status (status) | Version scheme (versionType) | Exclusive end (lessThan) | Inclusive end (lessThanOrEqual) | Status changes (at → status) |
|---|---|---|---|---|---|
| 0 | affected | semver | 5.19.4 | Unavailable | None listed |
| 6.0.0 | affected | semver | 6.2.4 | Unavailable | None listed |
Apache ActiveMQ All
- Vendor
- Apache Software Foundation
- Product
- Apache ActiveMQ All
- Platforms
- Unknown
- Default status
unaffected- Package
- org.apache.activemq:activemq-all
- Package collection
- https://repo.maven.apache.org/maven2
| Version (version) | Status (status) | Version scheme (versionType) | Exclusive end (lessThan) | Inclusive end (lessThanOrEqual) | Status changes (at → status) |
|---|---|---|---|---|---|
| 0 | affected | semver | 5.19.4 | Unavailable | None listed |
| 6.0.0 | affected | semver | 6.2.4 | Unavailable | None listed |
Apache ActiveMQ
- Vendor
- Apache Software Foundation
- Product
- Apache ActiveMQ
- Platforms
- Unknown
- Default status
unaffected- Package
- org.apache.activemq:apache-activemq
- Package collection
- https://repo.maven.apache.org/maven2
| Version (version) | Status (status) | Version scheme (versionType) | Exclusive end (lessThan) | Inclusive end (lessThanOrEqual) | Status changes (at → status) |
|---|---|---|---|---|---|
| 0 | affected | semver | 5.19.4 | Unavailable | None listed |
| 6.0.0 | affected | semver | 6.2.4 | Unavailable | None listed |