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GHSA-WR2R-M36X-734X

Vulnerability from github – Published: 2026-08-05 06:30 – Updated: 2026-08-06 15:32

Details

A pre-authentication attacker could leverage type size/count handling to cause excessive allocation leading to potential 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

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{
  "affected": [],
  "aliases": [
    "CVE-2026-66273"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-789"
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    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-08-05T06:16:38Z",
    "severity": "HIGH"
  },
  "details": "A pre-authentication attacker could leverage type size/count handling to cause excessive allocation leading to potential 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-wr2r-m36x-734x",
  "modified": "2026-08-06T15:32:32Z",
  "published": "2026-08-05T06:30:32Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-66273"
    },
    {
      "type": "WEB",
      "url": "https://lists.apache.org/thread/z34s9v5w05qk4qqtz5fs3v9wpxz6fnbh"
    },
    {
      "type": "WEB",
      "url": "http://www.openwall.com/lists/oss-security/2026/08/04/9"
    }
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  "severity": [
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      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
      "type": "CVSS_V3"
    }
  ]
}

CVE-2026-66273 (GCVE-0-2026-66273)

Vulnerability from cvelistv5 – Published: 2026-08-05 05:23 – Updated: 2026-08-06 13:48

Title

Apache Qpid Proton-J: Type size/count handling can lead to excessive allocation pre-authentication

Summary

A pre-authentication attacker could leverage type size/count handling to cause excessive allocation leading to potential 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 (v2.0.3)

CWE

CWE-789 - Memory Allocation with Excessive Size Value

Assigner

apache

References

2 references

URL	Tags
https://lists.apache.org/thread/z34s9v5w05qk4qqtz…	vendor-advisory
http://www.openwall.com/lists/oss-security/2026/08/04/9

Impacted products

1 product

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

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          "dateUpdated": "2026-08-05T06:57:50.909Z",
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          {
            "url": "http://www.openwall.com/lists/oss-security/2026/08/04/9"
          }
        ],
        "title": "CVE Program Container"
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              "attackComplexity": "LOW",
              "attackVector": "NETWORK",
              "availabilityImpact": "HIGH",
              "baseScore": 7.5,
              "baseSeverity": "HIGH",
              "confidentialityImpact": "NONE",
              "integrityImpact": "NONE",
              "privilegesRequired": "NONE",
              "scope": "UNCHANGED",
              "userInteraction": "NONE",
              "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
              "version": "3.1"
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                "timestamp": "2026-08-06T13:48:20.994589Z",
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        },
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      "metrics": [
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    "dateReserved": "2026-07-24T11:27:24.425Z",
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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.

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.

Action not permitted

GHSA-WR2R-M36X-734X

CVE-2026-66273 (GCVE-0-2026-66273)

Tags

Sightings

Nomenclature