Vulnerability-Lookup

CVE-2026-44967 (GCVE-0-2026-44967)

Vulnerability from cvelistv5 – Published: 2026-06-12 14:52 – Updated: 2026-06-12 16:10

Title

opentelemetry-cpp: OTLP HTTP exporters read unbounded HTTP response

Summary

OpenTelemetry-cpp is the C++ implementation of OpenTelemetry. Prior to release 1.27.0, the OTLP HTTP exporters (traces/metrics/logs) read the full HTTP response into an in-memory vector of bytes without a size cap. This is exploitable for memory exhaustion when the configured collector endpoint is attacker-controlled (or a network attacker can MITM the exporter connection). This vulnerability is fixed in opentelemetry-cpp release 1.27.0.

Severity

5.3 (Medium)


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

SSVC

Exploitation: poc Automatable: no Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-06-12 16:10 UTC

CWE

CWE-789 - Memory Allocation with Excessive Size Value

Assigner

GitHub_M mitre root

References

4 references

URL	Tags
https://github.com/open-telemetry/opentelemetry-c…	x_refsource_CONFIRM
https://github.com/open-telemetry/opentelemetry-g…	x_refsource_MISC
https://github.com/open-telemetry/opentelemetry-c…	x_refsource_MISC
https://github.com/open-telemetry/opentelemetry-c…	x_refsource_MISC

Impacted products

1 product

Vendor	Product	Version	CPE status
open-telemetry	opentelemetry-cpp	Affected: < 1.27.0	guessed

Show details on NVD website

JSON

To clipboard

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        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2026-44967",
                "options": [
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                  }
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                "timestamp": "2026-06-12T16:10:44.803865Z",
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    "datePublished": "2026-06-12T14:52:00.124Z",
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      "epss": "0.00206",
      "percentile": "0.10952"
    },
    "microsoft_vex": {
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      "product_status:fixed": "2",
      "product_status:known_affected": "2",
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      "version": "7"
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    "redhat_vex": {
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      "product_status:known_affected": "16",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "opentelemetry-: opentelemetry-cpp: Denial of Service via unbounded HTTP response read",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-44967.json",
      "version": "3"
    },
    "vulnrichment": {
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}

FKIE_CVE-2026-44967

Vulnerability from fkie_nvd - Published: 2026-06-12 16:16 - Updated: 2026-06-17 10:51

Severity

5.3 (Medium) - CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
5.3 (Medium) - CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H

Summary

References

URL	Tags
security-advisories@github.com	https://github.com/open-telemetry/opentelemetry-cpp/issues/3958	Issue Tracking
security-advisories@github.com	https://github.com/open-telemetry/opentelemetry-cpp/pull/4078	Issue Tracking
security-advisories@github.com	https://github.com/open-telemetry/opentelemetry-cpp/security/advisories/GHSA-5qhm-4rfp-qqvj	Vendor Advisory
security-advisories@github.com	https://github.com/open-telemetry/opentelemetry-go/security/advisories/GHSA-w8rr-5gcm-pp58	Not Applicable, Vendor Advisory
134c704f-9b21-4f2e-91b3-4a467353bcc0	https://github.com/open-telemetry/opentelemetry-go/security/advisories/GHSA-w8rr-5gcm-pp58	Not Applicable, Vendor Advisory

Impacted products

	Vendor	Product	Version
	opentelemetry	opentelemetry	*

JSON

To clipboard

{
  "affected": [
    {
      "affectedData": [
        {
          "product": "opentelemetry-cpp",
          "vendor": "open-telemetry",
          "versions": [
            {
              "status": "affected",
              "version": "\u003c 1.27.0"
            }
          ]
        }
      ],
      "source": "security-advisories@github.com"
    }
  ],
  "configurations": [
    {
      "nodes": [
        {
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:a:opentelemetry:opentelemetry:*:*:*:*:*:c\\+\\+:*:*",
              "matchCriteriaId": "E6B7D91B-4209-406A-9687-9A049D494ECB",
              "versionEndExcluding": "1.27.0",
              "vulnerable": true
            }
          ],
          "negate": false,
          "operator": "OR"
        }
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    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "OpenTelemetry-cpp is the C++ implementation of OpenTelemetry. Prior to release 1.27.0, the OTLP HTTP exporters (traces/metrics/logs) read the full HTTP response into an in-memory vector of bytes without a size cap. This is exploitable for memory exhaustion when the configured collector endpoint is attacker-controlled (or a network attacker can MITM the exporter connection). This vulnerability is fixed in opentelemetry-cpp release 1.27.0."
    }
  ],
  "id": "CVE-2026-44967",
  "lastModified": "2026-06-17T10:51:32.830",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "HIGH",
          "attackVector": "ADJACENT_NETWORK",
          "availabilityImpact": "HIGH",
          "baseScore": 5.3,
          "baseSeverity": "MEDIUM",
          "confidentialityImpact": "NONE",
          "integrityImpact": "NONE",
          "privilegesRequired": "NONE",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H",
          "version": "3.1"
        },
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        "impactScore": 3.6,
        "source": "security-advisories@github.com",
        "type": "Secondary"
      },
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          "attackVector": "ADJACENT_NETWORK",
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          "userInteraction": "NONE",
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          "version": "3.1"
        },
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        "impactScore": 3.6,
        "source": "nvd@nist.gov",
        "type": "Primary"
      }
    ],
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      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
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          "options": [
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            },
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      "source": "security-advisories@github.com",
      "tags": [
        "Issue Tracking"
      ],
      "url": "https://github.com/open-telemetry/opentelemetry-cpp/issues/3958"
    },
    {
      "source": "security-advisories@github.com",
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        "Issue Tracking"
      ],
      "url": "https://github.com/open-telemetry/opentelemetry-cpp/pull/4078"
    },
    {
      "source": "security-advisories@github.com",
      "tags": [
        "Vendor Advisory"
      ],
      "url": "https://github.com/open-telemetry/opentelemetry-cpp/security/advisories/GHSA-5qhm-4rfp-qqvj"
    },
    {
      "source": "security-advisories@github.com",
      "tags": [
        "Not Applicable",
        "Vendor Advisory"
      ],
      "url": "https://github.com/open-telemetry/opentelemetry-go/security/advisories/GHSA-w8rr-5gcm-pp58"
    },
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      "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
      "tags": [
        "Not Applicable",
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    }
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  "vulnStatus": "Analyzed",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-789"
        }
      ],
      "source": "security-advisories@github.com",
      "type": "Secondary"
    }
  ]
}

MSRC_CVE-2026-44967

Vulnerability from csaf_microsoft - Published: 2026-06-02 00:00 - Updated: 2026-07-01 14:41

Summary

opentelemetry-cpp: OTLP HTTP exporters read unbounded HTTP response

Scope

1 vulnerability in this advisory, including CVE-2026-44967.

CVE-2026-44967

5.3 (Medium)


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

Fixed: 2 products Known affected: 2 products Known not affected: 1 product

https://learn.microsoft.com/en-us/azure/azure-linux/tutoria…

Open the full advisory

ubuntu-cve-2026-44967

Vulnerability from osv_ubuntu

Published

2026-06-12 16:16

Modified

2026-06-22 07:40

Summary

Details

Severity

5.3 (Medium)


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

5.3 (Medium)


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

N/A (UNKNOWN)


                    
                      medium

References

URL

Type

	https://ubuntu.com/security/CVE-2026-44967	REPORT
	https://www.cve.org/CVERecord?id=CVE-2026-44967	REPORT
	https://github.com/open-telemetry/opentelemetry-c…	REPORT
	https://github.com/open-telemetry/opentelemetry-c…	REPORT
	https://github.com/open-telemetry/opentelemetry-c…	REPORT
	https://github.com/open-telemetry/opentelemetry-g…	REPORT

JSON

To clipboard

{
  "affected": [
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "opentelemetry-cpp",
            "binary_version": "1.19.0-3"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:25.10",
        "name": "opentelemetry-cpp",
        "purl": "pkg:deb/ubuntu/opentelemetry-cpp@1.19.0-3?arch=source\u0026distro=questing"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "1.17.0-3ubuntu1",
        "1.19.0-3"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "opentelemetry-cpp",
            "binary_version": "1.23.0-3build1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:26.04:LTS",
        "name": "opentelemetry-cpp",
        "purl": "pkg:deb/ubuntu/opentelemetry-cpp@1.23.0-3build1?arch=source\u0026distro=resolute"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "1.19.0-3",
        "1.23.0-2",
        "1.23.0-3",
        "1.23.0-3build1"
      ]
    }
  ],
  "aliases": [],
  "details": "OpenTelemetry-cpp is the C++ implementation of OpenTelemetry. Prior to release 1.27.0, the OTLP HTTP exporters (traces/metrics/logs) read the full HTTP response into an in-memory vector of bytes without a size cap. This is exploitable for memory exhaustion when the configured collector endpoint is attacker-controlled (or a network attacker can MITM the exporter connection). This vulnerability is fixed in opentelemetry-cpp release 1.27.0.",
  "id": "UBUNTU-CVE-2026-44967",
  "modified": "2026-06-22T07:40:24Z",
  "published": "2026-06-12T16:16:00Z",
  "references": [
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2026-44967"
    },
    {
      "type": "REPORT",
      "url": "https://www.cve.org/CVERecord?id=CVE-2026-44967"
    },
    {
      "type": "REPORT",
      "url": "https://github.com/open-telemetry/opentelemetry-cpp/security/advisories/GHSA-5qhm-4rfp-qqvj"
    },
    {
      "type": "REPORT",
      "url": "https://github.com/open-telemetry/opentelemetry-cpp/issues/3958"
    },
    {
      "type": "REPORT",
      "url": "https://github.com/open-telemetry/opentelemetry-cpp/pull/4078"
    },
    {
      "type": "REPORT",
      "url": "https://github.com/open-telemetry/opentelemetry-go/security/advisories/GHSA-w8rr-5gcm-pp58"
    }
  ],
  "related": [],
  "schema_version": "1.7.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H",
      "type": "CVSS_V3"
    },
    {
      "score": "CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H",
      "type": "CVSS_V3"
    },
    {
      "score": "medium",
      "type": "Ubuntu"
    }
  ],
  "upstream": [
    "CVE-2026-44967"
  ]
}

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-2026-44967 (GCVE-0-2026-44967)

FKIE_CVE-2026-44967

MSRC_CVE-2026-44967

ubuntu-cve-2026-44967

Vulnerability from osv_ubuntu

Tags

Sightings

Nomenclature

Related by attack behaviour