Vulnerability-Lookup

GHSA-7259-VF48-52Q3

Vulnerability from github – Published: 2026-06-30 12:31 – Updated: 2026-06-30 15:30

Details

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.

Severity

7.5 (High)


                  
                    CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

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{
  "affected": [],
  "aliases": [
    "CVE-2026-50734"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-789"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-06-30T11:16:29Z",
    "severity": "HIGH"
  },
  "details": "Memory Allocation with Excessive Size Value vulnerability in Apache ActiveMQ Client, Apache ActiveMQ, Apache ActiveMQ All.\n\nAn 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.\nThis 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.\n\nUsers are recommended to upgrade to version 6.2.7 or 5.19.8, which fixes the issue.",
  "id": "GHSA-7259-vf48-52q3",
  "modified": "2026-06-30T15:30:44Z",
  "published": "2026-06-30T12:31:52Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-50734"
    },
    {
      "type": "WEB",
      "url": "https://lists.apache.org/thread/nxso951fnvf72qf9m475mpz4yf931xk0"
    },
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      "type": "WEB",
      "url": "http://www.openwall.com/lists/oss-security/2026/06/29/10"
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  "severity": [
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      "type": "CVSS_V3"
    }
  ]
}

CVE-2026-50734 (GCVE-0-2026-50734)

Vulnerability from cvelistv5 – Published: 2026-06-30 09:53 – Updated: 2026-06-30 12:32

Title

Apache ActiveMQ Client, Apache ActiveMQ, Apache ActiveMQ All: Pre-authentication OpenWire memory-allocation DoS during wire format negotiation

Summary

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.

Severity

7.5 (High)


                        
                          CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

SSVC

Exploitation: none Automatable: yes Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-06-30 12:32 UTC

CWE

CWE-789 - Memory Allocation with Excessive Size Value

Assigner

apache mitre root

References

2 references

URL	Tags
https://lists.apache.org/thread/nxso951fnvf72qf9m…	vendor-advisory
http://www.openwall.com/lists/oss-security/2026/0…

Impacted products

3 products

Vendor	Product	Version
Apache Software Foundation	Apache ActiveMQ Client	Affected: 0 , < 5.19.8 (semver) Affected: 6.0.0 , < 6.2.7 (semver)
Apache Software Foundation	Apache ActiveMQ	Affected: 0 , < 5.19.8 (semver) Affected: 6.0.0 , < 6.2.7 (semver)
Apache Software Foundation	Apache ActiveMQ All	Affected: 0 , < 5.19.8 (semver) Affected: 6.0.0 , < 6.2.7 (semver)

Credits

Andrej Tomci

Show details on NVD website

JSON

To clipboard

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Sightings

Author	Source	Type	Date	Other

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
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GHSA-7259-VF48-52Q3

CVE-2026-50734 (GCVE-0-2026-50734)

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