Vulnerability-Lookup

CVE-2026-66274 (GCVE-0-2026-66274)

Vulnerability from cvelistv5 – Published: 2026-08-05 05:29 – Updated: 2026-08-06 15:37

Title

Apache Qpid Proton-J: Unbounded type nesting can lead to pre-authentication stackoverflow

Summary

A pre-authentication attacker could leverage type nesting to cause a StackOverflowError potentially leading to denial of service. This issue affects Apache Qpid Proton-J: through 0.34.1. Users are recommended to upgrade to version 0.35.0, 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 2026-08-06 15:07 UTC

CWE

CWE-674 - Uncontrolled Recursion

Assigner

apache mitre root

References

2 references

URL	Tags
https://lists.apache.org/thread/h7xolzws2by2qhdjf…	vendor-advisory
http://www.openwall.com/lists/oss-security/2026/0…

Impacted products

1 product

Vendor	Product	Version	CPE status
Apache Software Foundation	Apache Qpid Proton-J	Affected: 0 , ≤ 0.34.1 (semver)	guessed

Show details on NVD website

JSON

To clipboard

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FKIE_CVE-2026-66274

Vulnerability from fkie_nvd - Published: 2026-08-05 07:16 - Updated: 2026-08-07 20:31

Severity

7.5 (High) - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Summary

References

	URL	Tags
	security@apache.org	https://lists.apache.org/thread/h7xolzws2by2qhdjf7scbx87foxojb5h	Vendor Advisory
	af854a3a-2127-422b-91ae-364da2661108	http://www.openwall.com/lists/oss-security/2026/08/04/10	Third Party Advisory

Impacted products

	Vendor	Product	Version
	apache	qpid_proton-j	*

JSON

To clipboard

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          "collectionURL": "https://repo.maven.apache.org/maven2",
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          "packageName": "org.apache.qpid:proton-j",
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GHSA-P2GC-FM5W-94JJ

Vulnerability from github – Published: 2026-08-05 09:31 – Updated: 2026-08-07 00:31

Details

A pre-authentication attacker could leverage type nesting to cause a StackOverflowError potentially leading to denial of service.

This issue affects Apache Qpid Proton-J: through 0.34.1.

Users are recommended to upgrade to version 0.35.0, 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

Show details on source website

JSON

To clipboard

{
  "affected": [],
  "aliases": [
    "CVE-2026-66274"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-674"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-08-05T07:16:37Z",
    "severity": "HIGH"
  },
  "details": "A pre-authentication attacker could leverage type nesting to cause a StackOverflowError potentially leading to denial of service.\n\nThis issue affects Apache Qpid Proton-J: through 0.34.1.\n\nUsers are recommended to upgrade to version 0.35.0, which fixes the issue.",
  "id": "GHSA-p2gc-fm5w-94jj",
  "modified": "2026-08-07T00:31:08Z",
  "published": "2026-08-05T09:31:15Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-66274"
    },
    {
      "type": "WEB",
      "url": "https://lists.apache.org/thread/h7xolzws2by2qhdjf7scbx87foxojb5h"
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      "url": "http://www.openwall.com/lists/oss-security/2026/08/04/10"
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  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
      "type": "CVSS_V3"
    }
  ]
}

RHSA-2026:63302

Vulnerability from csaf_redhat - Published: 2026-09-03 18:34 - Updated: 2026-09-11 10:21

Summary

Red Hat Security Advisory: Red Hat Build of Apache Camel 4.18 for Quarkus 3.33 update is now available (RHBQ 3.33.3.SP1)

Severity

Important

Scope

9 vulnerabilities in this advisory, including CVE-2026-66274.

CVE-2026-66274

A flaw was found in Apache Qpid Proton-J. A remote attacker, without needing to authenticate, could exploit a vulnerability related to unbounded type nesting. This could lead to a StackOverflowError, causing the affected system to become unresponsive and resulting in a denial of service.

7.5 (High)


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

Fixed: 1 product

https://access.redhat.com/errata/RHSA-2026:63302

Open the full advisory

RHSA-2026:66488

Vulnerability from csaf_redhat - Published: 2026-09-10 16:34 - Updated: 2026-09-16 05:38

Summary

Red Hat Security Advisory: Red Hat AMQ Broker 7.14.1 release and security update

Severity

Important

Scope

67 vulnerabilities in this advisory, including CVE-2026-66274.

CVE-2026-66274

7.5 (High)


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

Fixed: 1 product

https://access.redhat.com/errata/RHSA-2026:66488

Open the full advisory

RHSA-2026:66545

Vulnerability from csaf_redhat - Published: 2026-09-10 23:22 - Updated: 2026-09-16 05:38

Summary

Red Hat Security Advisory: Red Hat AMQ Broker 7.13.6 release and security update

Severity

Important

Scope

59 vulnerabilities in this advisory, including CVE-2026-66274.

CVE-2026-66274

7.5 (High)


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

Fixed: 1 product

https://access.redhat.com/errata/RHSA-2026:66545

Open the full advisory

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.

Detection rules are retrieved from Rulezet.

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.
Browse all ATT&CK techniques and the vulnerabilities related to each.

Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.

Action not permitted

CVE-2026-66274 (GCVE-0-2026-66274)

FKIE_CVE-2026-66274

GHSA-P2GC-FM5W-94JJ

RHSA-2026:63302

RHSA-2026:66488

RHSA-2026:66545

Tags

Sightings

Nomenclature

Related by attack behaviour