Vulnerability-Lookup

CVE-2026-69220 (GCVE-0-2026-69220)

Vulnerability from cvelistv5 – Published: 2026-08-18 16:25 – Updated: 2026-08-18 17:45

Title

RabbitMQ Java client ValueReader: Unbounded recursive table/array nesting causes StackOverflowError DoS

Summary

The RabbitMQ Java client library allows Java and JVM-based applications to connect to and interact with RabbitMQ nodes. Prior to 5.33.1, src/main/java/com/rabbitmq/client/impl/ValueReader.java permits ValueReader.readTable and ValueReader.readArray to call ValueReader.readFieldValue recursively for AMQP table type F and AMQP array type A values without a nesting-depth limit. A malicious AMQP server or network intermediary can send approximately 580 nested table levels in the pre-authentication connection.start frame, fitting within the default 131072-byte frame maximum, to trigger StackOverflowError. The error terminates the client input processing thread and causes denial of service. This issue is fixed in version 5.33.1.

Severity

8.7 (High)


                        
                          CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N

SSVC

Exploitation: none Automatable: yes Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-08-18 17:44 UTC

CWE

CWE-674 - Uncontrolled Recursion

Assigner

GitHub_M mitre root

References

6 references

URL	Tags
https://github.com/rabbitmq/rabbitmq-java-client/…	x_refsource_CONFIRM
https://github.com/rabbitmq/rabbitmq-java-client/…	x_refsource_MISC
https://github.com/rabbitmq/rabbitmq-java-client/…	x_refsource_MISC
https://github.com/rabbitmq/rabbitmq-java-client/…	x_refsource_MISC
https://github.com/rabbitmq/rabbitmq-java-client/…	x_refsource_MISC
https://github.com/rabbitmq/rabbitmq-java-client/…	x_refsource_MISC

Impacted products

1 product

Vendor	Product	Version	CPE status
rabbitmq	rabbitmq-java-client	Affected: < 5.33.1	guessed

Show details on NVD website

JSON

To clipboard

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FKIE_CVE-2026-69220

Vulnerability from fkie_nvd - Published: 2026-08-18 17:17 - Updated: 2026-08-18 18:19

Severity

8.7 (High) - CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N

Summary

References

	URL	Tags
	security-advisories@github.com	https://github.com/rabbitmq/rabbitmq-java-client/commit/09af76fce136f3136931654a0a1d43095c80e2f0
	security-advisories@github.com	https://github.com/rabbitmq/rabbitmq-java-client/commit/db89e34809fbc6ba4e946615f297f3684ccd0acc
	security-advisories@github.com	https://github.com/rabbitmq/rabbitmq-java-client/pull/2007
	security-advisories@github.com	https://github.com/rabbitmq/rabbitmq-java-client/pull/2008
	security-advisories@github.com	https://github.com/rabbitmq/rabbitmq-java-client/releases/tag/v5.33.1
	security-advisories@github.com	https://github.com/rabbitmq/rabbitmq-java-client/security/advisories/GHSA-93j5-89vc-pph4

Impacted products

	Vendor	Product	Version

JSON

To clipboard

{
  "affected": [
    {
      "affectedData": [
        {
          "product": "rabbitmq-java-client",
          "vendor": "rabbitmq",
          "versions": [
            {
              "status": "affected",
              "version": "\u003c 5.33.1"
            }
          ]
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    }
  ],
  "id": "CVE-2026-69220",
  "lastModified": "2026-08-18T18:19:28.640",
  "metrics": {
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          "attackRequirements": "NONE",
          "attackVector": "NETWORK",
          "availabilityRequirement": "NOT_DEFINED",
          "baseScore": 8.7,
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          "valueDensity": "NOT_DEFINED",
          "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X",
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GHSA-93J5-89VC-PPH4

Vulnerability from github – Published: 2026-08-18 16:32 – Updated: 2026-08-18 16:32

Summary

RabbitMQ Java client ValueReader: Unbounded recursive table/array nesting causes StackOverflowError DoS

Details

Summary

ValueReader.readTable() and readArray() recursively call readFieldValue() with no depth limit. A malicious AMQP peer can crash the client JVM by sending a deeply nested table structure.

Vulnerable Code

src/main/java/com/rabbitmq/client/impl/ValueReader.java lines 139-155 and 237-249:

private static Map<String, Object> readTable(DataInputStream in) throws IOException {
    long tableLength = unsignedExtend(in.readInt());
    // ...
    while(tableIn.available() > 0) {
        String name = readShortstr(tableIn);
        Object value = readFieldValue(tableIn);  // recursive call
    }
}

static Object readFieldValue(DataInputStream in) throws IOException {
    switch(in.readUnsignedByte()) {
      case 'F': value = readTable(in);  // mutual recursion
      case 'A': value = readArray(in);  // mutual recursion
    }
}

Attack Scenario

A malicious AMQP server (or MitM) sends a connection.start frame with ~580 levels of nested tables. Each level costs ~7 bytes (4-byte length + 1-byte key length + 1-byte key + 1-byte type tag), totaling ~4060 bytes within the 131,072 byte max frame size. With the default JVM stack (~512KB, ~864 bytes/frame), this triggers StackOverflowError, killing the I/O thread.

Exploitable pre-authentication since connection.start is the very first server frame.

Impact

Denial of service. StackOverflowError kills the client I/O thread.

CWE

CWE-674: Uncontrolled Recursion

Remediation

Add a depth counter to readTable/readArray/readFieldValue and throw MalformedFrameException when exceeding a threshold (e.g., 32).

Severity

8.7 (High)


                  
                    CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N

Show details on source website

JSON

To clipboard

{
  "affected": [
    {
      "database_specific": {
        "last_known_affected_version_range": "\u003c= 5.33.0"
      },
      "package": {
        "ecosystem": "Maven",
        "name": "com.rabbitmq:amqp-client"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "5.33.1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2026-69220"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-674"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2026-08-18T16:32:12Z",
    "nvd_published_at": null,
    "severity": "HIGH"
  },
  "details": "## Summary\n\n`ValueReader.readTable()` and `readArray()` recursively call `readFieldValue()` with no depth limit. A malicious AMQP peer can crash the client JVM by sending a deeply nested table structure.\n\n## Vulnerable Code\n\n`src/main/java/com/rabbitmq/client/impl/ValueReader.java` lines 139-155 and 237-249:\n\n```java\nprivate static Map\u003cString, Object\u003e readTable(DataInputStream in) throws IOException {\n    long tableLength = unsignedExtend(in.readInt());\n    // ...\n    while(tableIn.available() \u003e 0) {\n        String name = readShortstr(tableIn);\n        Object value = readFieldValue(tableIn);  // recursive call\n    }\n}\n\nstatic Object readFieldValue(DataInputStream in) throws IOException {\n    switch(in.readUnsignedByte()) {\n      case \u0027F\u0027: value = readTable(in);  // mutual recursion\n      case \u0027A\u0027: value = readArray(in);  // mutual recursion\n    }\n}\n```\n\n## Attack Scenario\n\nA malicious AMQP server (or MitM) sends a `connection.start` frame with ~580 levels of nested tables. Each level costs ~7 bytes (4-byte length + 1-byte key length + 1-byte key + 1-byte type tag), totaling ~4060 bytes within the 131,072 byte max frame size. With the default JVM stack (~512KB, ~864 bytes/frame), this triggers `StackOverflowError`, killing the I/O thread.\n\nExploitable pre-authentication since `connection.start` is the very first server frame.\n\n## Impact\n\nDenial of service. `StackOverflowError` kills the client I/O thread.\n\n## CWE\n\nCWE-674: Uncontrolled Recursion\n\n## Remediation\n\nAdd a depth counter to `readTable`/`readArray`/`readFieldValue` and throw `MalformedFrameException` when exceeding a threshold (e.g., 32).",
  "id": "GHSA-93j5-89vc-pph4",
  "modified": "2026-08-18T16:32:12Z",
  "published": "2026-08-18T16:32:12Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/rabbitmq/rabbitmq-java-client/security/advisories/GHSA-93j5-89vc-pph4"
    },
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      "url": "https://github.com/rabbitmq/rabbitmq-java-client/pull/2007"
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    },
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    {
      "type": "WEB",
      "url": "https://github.com/rabbitmq/rabbitmq-java-client/commit/db89e34809fbc6ba4e946615f297f3684ccd0acc"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/rabbitmq/rabbitmq-java-client"
    },
    {
      "type": "WEB",
      "url": "https://github.com/rabbitmq/rabbitmq-java-client/releases/tag/v5.33.1"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N",
      "type": "CVSS_V4"
    }
  ],
  "summary": "RabbitMQ Java client ValueReader: Unbounded recursive table/array nesting causes StackOverflowError DoS"
}

ubuntu-cve-2026-69220

Vulnerability from osv_ubuntu

Published

2026-08-19 00:00

Modified

2026-08-20 08:16

Summary

Details

(The RabbitMQ Java client library allows Java and JVM-based application ...)

Severity

8.7 (High)


                    
                      CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N

N/A (UNKNOWN)


                    
                      medium

References

URL

Type

	https://ubuntu.com/security/CVE-2026-69220	REPORT
	https://www.cve.org/CVERecord?id=CVE-2026-69220	REPORT

JSON

To clipboard

{
  "affected": [
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "librabbitmq-client-java",
            "binary_version": "5.0.0-1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:18.04:LTS",
        "name": "rabbitmq-java-client",
        "purl": "pkg:deb/ubuntu/rabbitmq-java-client@5.0.0-1?arch=source\u0026distro=bionic"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "5.0.0-1"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "librabbitmq-client-java",
            "binary_version": "5.0.0-1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:20.04:LTS",
        "name": "rabbitmq-java-client",
        "purl": "pkg:deb/ubuntu/rabbitmq-java-client@5.0.0-1?arch=source\u0026distro=focal"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "5.0.0-1"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "librabbitmq-client-java",
            "binary_version": "5.0.0-1.1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:22.04:LTS",
        "name": "rabbitmq-java-client",
        "purl": "pkg:deb/ubuntu/rabbitmq-java-client@5.0.0-1.1?arch=source\u0026distro=jammy"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "5.0.0-1.1"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "librabbitmq-client-java",
            "binary_version": "5.0.0-1.1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:24.04:LTS",
        "name": "rabbitmq-java-client",
        "purl": "pkg:deb/ubuntu/rabbitmq-java-client@5.0.0-1.1?arch=source\u0026distro=noble"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "5.0.0-1.1"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "librabbitmq-client-java",
            "binary_version": "5.0.0-2"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:26.04:LTS",
        "name": "rabbitmq-java-client",
        "purl": "pkg:deb/ubuntu/rabbitmq-java-client@5.0.0-2?arch=source\u0026distro=resolute"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "5.0.0-1.1",
        "5.0.0-2"
      ]
    }
  ],
  "aliases": [],
  "details": "(The RabbitMQ Java client library allows Java and JVM-based application ...)",
  "id": "UBUNTU-CVE-2026-69220",
  "modified": "2026-08-20T08:16:46Z",
  "published": "2026-08-19T00:00:00Z",
  "references": [
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2026-69220"
    },
    {
      "type": "REPORT",
      "url": "https://www.cve.org/CVERecord?id=CVE-2026-69220"
    }
  ],
  "related": [],
  "schema_version": "1.7.0",
  "severity": [
    {
      "score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N",
      "type": "CVSS_V4"
    },
    {
      "score": "medium",
      "type": "Ubuntu"
    }
  ],
  "upstream": [
    "CVE-2026-69220"
  ]
}

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.

Action not permitted

CVE-2026-69220 (GCVE-0-2026-69220)

FKIE_CVE-2026-69220

GHSA-93J5-89VC-PPH4

Summary

Vulnerable Code

Attack Scenario

Impact

CWE

Remediation

ubuntu-cve-2026-69220

Vulnerability from osv_ubuntu

Tags

Sightings

Nomenclature