Vulnerability-Lookup

Vulnerability from bitnami_vulndb

Published

2026-07-14 08:42

Modified

2026-07-14 09:10

Summary

Fluentd: Denial of Service (DoS) via Gzip Decompression Bomb in `in_http` and `in_forward`

Details

Fluentd collects events from various data sources and writes them to files, RDBMS, NoSQL, IaaS, SaaS, Hadoop and so on. Prior to 1.19.3, Fluentd's in_http and in_forward plugins support gzip-compressed data but enforce limits only on compressed payloads through settings such as body_size_limit and chunk_size_limit, allowing crafted compressed payloads to decompress in memory to an excessive size and cause denial of service through memory exhaustion. This issue is fixed in version 1.19.3.

JSON

To clipboard

{
  "affected": [
    {
      "package": {
        "ecosystem": "Bitnami",
        "name": "fluentd",
        "purl": "pkg:bitnami/fluentd"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "1.19.3"
            }
          ],
          "type": "SEMVER"
        }
      ],
      "severity": [
        {
          "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
          "type": "CVSS_V3"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2026-44160"
  ],
  "database_specific": {
    "cpes": [
      "cpe:2.3:a:fluentd:fluentd:*:*:*:*:*:ruby:*:*"
    ],
    "severity": "High"
  },
  "details": "Fluentd collects events from various data sources and writes them to files, RDBMS, NoSQL, IaaS, SaaS, Hadoop and so on. Prior to 1.19.3, Fluentd\u0027s in_http and in_forward plugins support gzip-compressed data but enforce limits only on compressed payloads through settings such as body_size_limit and chunk_size_limit, allowing crafted compressed payloads to decompress in memory to an excessive size and cause denial of service through memory exhaustion. This issue is fixed in version 1.19.3.",
  "id": "BIT-fluentd-2026-44160",
  "modified": "2026-07-14T09:10:57.073Z",
  "published": "2026-07-14T08:42:51.256Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/fluent/fluentd/commit/f5f2b7cddf8aab3932e6dec9fa367a5f3eb27e10"
    },
    {
      "type": "WEB",
      "url": "https://github.com/fluent/fluentd/pull/5393"
    },
    {
      "type": "WEB",
      "url": "https://github.com/fluent/fluentd/releases/tag/v1.19.3"
    },
    {
      "type": "WEB",
      "url": "https://github.com/fluent/fluentd/security/advisories/GHSA-j9cw-hwqf-85w7"
    },
    {
      "type": "WEB",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-44160"
    }
  ],
  "schema_version": "1.6.2",
  "summary": "Fluentd: Denial of Service (DoS) via Gzip Decompression Bomb in `in_http` and `in_forward`"
}

CVE-2026-44160 (GCVE-0-2026-44160)

Vulnerability from cvelistv5 – Published: 2026-07-08 21:24 – Updated: 2026-07-09 19:34

Title

Fluentd: Denial of Service (DoS) via Gzip Decompression Bomb in `in_http` and `in_forward`

Summary

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-409 - Improper Handling of Highly Compressed Data (Data Amplification)

Assigner

GitHub_M

References

4 references

URL	Tags
https://github.com/fluent/fluentd/security/adviso…	x_refsource_CONFIRM
https://github.com/fluent/fluentd/pull/5393	x_refsource_MISC
https://github.com/fluent/fluentd/commit/f5f2b7cd…	x_refsource_MISC
https://github.com/fluent/fluentd/releases/tag/v1.19.3	x_refsource_MISC

Impacted products

1 product

Vendor	Product	Version
fluent	fluentd	Affected: < 1.19.3

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2026-44160",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "yes"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-07-09T19:34:49.901088Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2026-07-09T19:34:55.352Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "product": "fluentd",
          "vendor": "fluent",
          "versions": [
            {
              "status": "affected",
              "version": "\u003c 1.19.3"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "Fluentd collects events from various data sources and writes them to files, RDBMS, NoSQL, IaaS, SaaS, Hadoop and so on. Prior to 1.19.3, Fluentd\u0027s in_http and in_forward plugins support gzip-compressed data but enforce limits only on compressed payloads through settings such as body_size_limit and chunk_size_limit, allowing crafted compressed payloads to decompress in memory to an excessive size and cause denial of service through memory exhaustion. This issue is fixed in version 1.19.3."
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "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"
          }
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-409",
              "description": "CWE-409: Improper Handling of Highly Compressed Data (Data Amplification)",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-07-08T21:24:28.346Z",
        "orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
        "shortName": "GitHub_M"
      },
      "references": [
        {
          "name": "https://github.com/fluent/fluentd/security/advisories/GHSA-j9cw-hwqf-85w7",
          "tags": [
            "x_refsource_CONFIRM"
          ],
          "url": "https://github.com/fluent/fluentd/security/advisories/GHSA-j9cw-hwqf-85w7"
        },
        {
          "name": "https://github.com/fluent/fluentd/pull/5393",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/fluent/fluentd/pull/5393"
        },
        {
          "name": "https://github.com/fluent/fluentd/commit/f5f2b7cddf8aab3932e6dec9fa367a5f3eb27e10",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/fluent/fluentd/commit/f5f2b7cddf8aab3932e6dec9fa367a5f3eb27e10"
        },
        {
          "name": "https://github.com/fluent/fluentd/releases/tag/v1.19.3",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/fluent/fluentd/releases/tag/v1.19.3"
        }
      ],
      "source": {
        "advisory": "GHSA-j9cw-hwqf-85w7",
        "discovery": "UNKNOWN"
      },
      "title": "Fluentd: Denial of Service (DoS) via Gzip Decompression Bomb in `in_http` and `in_forward`"
    }
  },
  "cveMetadata": {
    "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
    "assignerShortName": "GitHub_M",
    "cveId": "CVE-2026-44160",
    "datePublished": "2026-07-08T21:24:28.346Z",
    "dateReserved": "2026-05-05T14:39:34.922Z",
    "dateUpdated": "2026-07-09T19:34:55.352Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

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.

Action not permitted

Vulnerability from bitnami_vulndb

CVE-2026-44160 (GCVE-0-2026-44160)

Tags

Sightings

Nomenclature