CVE-2026-50734: Memory Allocation with Excessive Size Value vulnerability in Apache ActiveMQ Client, Apache ActiveMQ, Apache ActiveMQ All. An unauthenticated network attacker can cause a broker D
Memory Allocation with Excessive Size Value vulnerability in Apache ActiveMQ Client, Apache ActiveMQ, Apache ActiveMQ All.
An unauthenticated network attacker can cause a broker DoS by sending a crafted WireFormatInfo frame with a malicious large size value. The value is not validate and causes the broker to attempt allocation during pre-auth negotiation which can trigger OOM and crash the broker.
This issue affects Apache ActiveMQ Client: before 5.19.8, from 6.0.0 before 6.2.7; 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.
Users are recommended to upgrade to version 6.2.7 or 5.19.8, which fixes the issue.
Details
Original advisory: https://nvd.nist.gov/vuln/detail/CVE-2026-50734
Exploitation outlook
EPSS (FIRST.org) estimates each CVE’s probability of exploitation in the next 30 days — here is the CSIRTS.com read on those numbers.
- Low exploitation riskCVE-2026-507340.80% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 52% of all scored CVEs.
Referenced CVEs
| CVE | CSIRTS overview | External |
|---|---|---|
| CVE-2026-50734 | coverage & exploitation status | NVD · CVE.org |
Recent advisories for Memory Allocation with
A cluster of recent advisories against the same product widens the attack surface — attackers routinely chain freshly published CVEs on one product, so review these together.
- lowCVE-2026-61870: ImageMagick before 7.1.2-26 contains a memory leak vulnerability in the VIFF encoder when memo…nvd · 2026-07-11
- lowCVE-2026-61861: ImageMagick before 7.1.2-26 contains a use-after-free vulnerability in the FormatMagickCaption…nvd · 2026-07-11
- lowCVE-2026-61465: ImageMagick before 7.1.2-26 and 6.9.13-51 is missing a check for the allowed memory allocation…nvd · 2026-07-11
- lowCVE-2026-56373: ImageMagick before 7.1.2-15 contains a use-after-free vulnerability in the PDB decoder that us…nvd · 2026-07-10
- highCVE-2026-40006: Memory Allocation with Excessive Size Value, Allocation of Resources Without Limits or Throttl…nvd · 2026-07-10
- unknownCVE-2026-42953: The application contains an out-of-bounds write vulnerability that can be exploited by an atta…nvd · 2026-07-07
More from NVD Recent CVEs
- mediumCVE-2026-15485: A flaw has been found in TRENDnet TEW-821DAP 1.11B03. The impacted element is the function sub…2026-07-12
- highCVE-2026-15484: A vulnerability was detected in TRENDnet TEW-821DAP 1.12B01. The affected element is the funct…2026-07-12
- highCVE-2026-15483: A security vulnerability has been detected in TRENDnet TEW-821DAP 1.12B01. Impacted is the fun…2026-07-12
- highCVE-2026-15482: A weakness has been identified in Aster Telecom Azcall 10/11. This issue affects some unknown …2026-07-12
- highCVE-2026-15481: A security flaw has been discovered in Trendnet TEW-635BRM up to 1.00.03. This vulnerability a…2026-07-12