CVE-2025-65637 (GCVE-0-2025-65637)

Vulnerability from cvelistv5 – Published: 2025-12-04 00:00 – Updated: 2025-12-05 21:52
VLAI
Summary
A denial-of-service vulnerability exists in github.com/sirupsen/logrus when using Entry.Writer() to log a single-line payload larger than 64KB without newline characters. Due to limitations in the internal bufio.Scanner, the read fails with "token too long" and the writer pipe is closed, leaving Writer() unusable and causing application unavailability (DoS). This affects versions < 1.8.3, 1.9.0, and 1.9.2. The issue is fixed in 1.8.3, 1.9.1, and 1.9.3+, where the input is chunked and the writer continues to function even if an error is logged.
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: no Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2025-12-05 21:52 UTC
CWE
  • n/a
  • CWE-400 - Uncontrolled Resource Consumption
Assigner
References
Show details on NVD website
To clipboard 

{
  "containers": {
    "adp": [
      {
        "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"
            }
          },
          {
            "other": {
              "content": {
                "id": "CVE-2025-65637",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2025-12-05T21:52:30.561592Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "problemTypes": [
          {
            "descriptions": [
              {
                "cweId": "CWE-400",
                "description": "CWE-400 Uncontrolled Resource Consumption",
                "lang": "en",
                "type": "CWE"
              }
            ]
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2025-12-05T21:52:59.784Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "product": "n/a",
          "vendor": "n/a",
          "versions": [
            {
              "status": "affected",
              "version": "n/a"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "A denial-of-service vulnerability exists in github.com/sirupsen/logrus when using Entry.Writer() to log a single-line payload larger than 64KB without newline characters. Due to limitations in the internal bufio.Scanner, the read fails with \"token too long\" and the writer pipe is closed, leaving Writer() unusable and causing application unavailability (DoS). This affects versions \u003c 1.8.3, 1.9.0, and 1.9.2. The issue is fixed in 1.8.3, 1.9.1, and 1.9.3+, where the input is chunked and the writer continues to function even if an error is logged."
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "description": "n/a",
              "lang": "en",
              "type": "text"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2025-12-04T18:17:04.939Z",
        "orgId": "8254265b-2729-46b6-b9e3-3dfca2d5bfca",
        "shortName": "mitre"
      },
      "references": [
        {
          "url": "https://github.com/mjuanxd/logrus-dos-poc"
        },
        {
          "url": "https://github.com/sirupsen/logrus/issues/1370"
        },
        {
          "url": "https://github.com/sirupsen/logrus/pull/1376"
        },
        {
          "url": "https://github.com/sirupsen/logrus/releases/tag/v1.8.3"
        },
        {
          "url": "https://github.com/sirupsen/logrus/releases/tag/v1.9.1"
        },
        {
          "url": "https://github.com/sirupsen/logrus/releases/tag/v1.9.3"
        },
        {
          "url": "https://security.snyk.io/vuln/SNYK-GOLANG-GITHUBCOMSIRUPSENLOGRUS-5564391"
        },
        {
          "url": "https://github.com/mjuanxd/logrus-dos-poc/blob/main/README.md"
        }
      ]
    }
  },
  "cveMetadata": {
    "assignerOrgId": "8254265b-2729-46b6-b9e3-3dfca2d5bfca",
    "assignerShortName": "mitre",
    "cveId": "CVE-2025-65637",
    "datePublished": "2025-12-04T00:00:00.000Z",
    "dateReserved": "2025-11-18T00:00:00.000Z",
    "dateUpdated": "2025-12-05T21:52:59.784Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
    "epss": {
      "cve": "CVE-2025-65637",
      "date": "2026-08-17",
      "epss": "0.00639",
      "percentile": "0.47658"
    },
    "microsoft_vex": {
      "current_release_date": "2026-02-26T14:35:34.000Z",
      "cve": "CVE-2025-65637",
      "id": "msrc_CVE-2025-65637",
      "initial_release_date": "2025-12-02T00:00:00.000Z",
      "product_status:fixed": "26",
      "product_status:known_affected": "32",
      "product_status:known_not_affected": "2",
      "source": "Microsoft CSAF VEX",
      "status": "final",
      "title": "A denial-of-service vulnerability exists in github.com/sirupsen/logrus when using Entry.Writer() to log a single-line payload larger than 64KB without newline characters.",
      "url": "https://msrc.microsoft.com/csaf/vex/2025/msrc_cve-2025-65637.json",
      "version": "13"
    },
    "nvd": "{\"cve\":{\"id\":\"CVE-2025-65637\",\"sourceIdentifier\":\"cve@mitre.org\",\"published\":\"2025-12-04T19:16:05.223\",\"lastModified\":\"2026-06-17T09:55:50.633\",\"vulnStatus\":\"Analyzed\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"A denial-of-service vulnerability exists in github.com/sirupsen/logrus when using Entry.Writer() to log a single-line payload larger than 64KB without newline characters. Due to limitations in the internal bufio.Scanner, the read fails with \\\"token too long\\\" and the writer pipe is closed, leaving Writer() unusable and causing application unavailability (DoS). This affects versions \u003c 1.8.3, 1.9.0, and 1.9.2. The issue is fixed in 1.8.3, 1.9.1, and 1.9.3+, where the input is chunked and the writer continues to function even if an error is logged.\"}],\"affected\":[{\"source\":\"cve@mitre.org\",\"affectedData\":[{\"vendor\":\"n/a\",\"product\":\"n/a\",\"versions\":[{\"version\":\"n/a\",\"status\":\"affected\"}]}]}],\"metrics\":{\"cvssMetricV31\":[{\"source\":\"134c704f-9b21-4f2e-91b3-4a467353bcc0\",\"type\":\"Secondary\",\"cvssData\":{\"version\":\"3.1\",\"vectorString\":\"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H\",\"baseScore\":7.5,\"baseSeverity\":\"HIGH\",\"attackVector\":\"NETWORK\",\"attackComplexity\":\"LOW\",\"privilegesRequired\":\"NONE\",\"userInteraction\":\"NONE\",\"scope\":\"UNCHANGED\",\"confidentialityImpact\":\"NONE\",\"integrityImpact\":\"NONE\",\"availabilityImpact\":\"HIGH\"},\"exploitabilityScore\":3.9,\"impactScore\":3.6}],\"ssvcV203\":[{\"source\":\"134c704f-9b21-4f2e-91b3-4a467353bcc0\",\"ssvcData\":{\"timestamp\":\"2025-12-05T21:52:30.561592Z\",\"id\":\"CVE-2025-65637\",\"options\":[{\"exploitation\":\"none\"},{\"automatable\":\"no\"},{\"technicalImpact\":\"partial\"}],\"role\":\"CISA Coordinator\",\"version\":\"2.0.3\"}}]},\"weaknesses\":[{\"source\":\"134c704f-9b21-4f2e-91b3-4a467353bcc0\",\"type\":\"Secondary\",\"description\":[{\"lang\":\"en\",\"value\":\"CWE-400\"}]}],\"configurations\":[{\"nodes\":[{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":true,\"criteria\":\"cpe:2.3:a:turbopuffer:logrus:*:*:*:*:*:go:*:*\",\"versionEndExcluding\":\"1.8.3\",\"matchCriteriaId\":\"B302F48C-A8EA-4FAB-B151-F8492365896C\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:a:turbopuffer:logrus:1.9.0:*:*:*:*:go:*:*\",\"matchCriteriaId\":\"25373732-88E0-4824-B243-9C1E82608B1C\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:a:turbopuffer:logrus:1.9.2:*:*:*:*:go:*:*\",\"matchCriteriaId\":\"E59CDE4C-3669-4EA6-AA2D-9BE99FDEC497\"}]}]}],\"references\":[{\"url\":\"https://github.com/mjuanxd/logrus-dos-poc\",\"source\":\"cve@mitre.org\",\"tags\":[\"Exploit\",\"Third Party Advisory\"]},{\"url\":\"https://github.com/mjuanxd/logrus-dos-poc/blob/main/README.md\",\"source\":\"cve@mitre.org\",\"tags\":[\"Exploit\",\"Third Party Advisory\"]},{\"url\":\"https://github.com/sirupsen/logrus/issues/1370\",\"source\":\"cve@mitre.org\",\"tags\":[\"Exploit\",\"Issue Tracking\",\"Patch\"]},{\"url\":\"https://github.com/sirupsen/logrus/pull/1376\",\"source\":\"cve@mitre.org\",\"tags\":[\"Issue Tracking\",\"Patch\"]},{\"url\":\"https://github.com/sirupsen/logrus/releases/tag/v1.8.3\",\"source\":\"cve@mitre.org\",\"tags\":[\"Release Notes\"]},{\"url\":\"https://github.com/sirupsen/logrus/releases/tag/v1.9.1\",\"source\":\"cve@mitre.org\",\"tags\":[\"Release Notes\"]},{\"url\":\"https://github.com/sirupsen/logrus/releases/tag/v1.9.3\",\"source\":\"cve@mitre.org\",\"tags\":[\"Release Notes\"]},{\"url\":\"https://security.snyk.io/vuln/SNYK-GOLANG-GITHUBCOMSIRUPSENLOGRUS-5564391\",\"source\":\"cve@mitre.org\",\"tags\":[\"Exploit\",\"Third Party Advisory\"]}]}}",
    "redhat_vex": {
      "aggregate_severity": "Moderate",
      "current_release_date": "2026-08-17T14:40:41+00:00",
      "cve": "CVE-2025-65637",
      "id": "CVE-2025-65637",
      "initial_release_date": "2025-12-04T00:00:00+00:00",
      "product_status:fixed": "2257",
      "product_status:known_affected": "268",
      "product_status:known_not_affected": "22245",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "github.com/sirupsen/logrus: github.com/sirupsen/logrus: Denial-of-Service due to large single-line payload",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2025/cve-2025-65637.json",
      "version": "3"
    },
    "vulnrichment": {
      "containers": "{\"adp\": [{\"title\": \"CISA ADP Vulnrichment\", \"metrics\": [{\"cvssV3_1\": {\"scope\": \"UNCHANGED\", \"version\": \"3.1\", \"baseScore\": 7.5, \"attackVector\": \"NETWORK\", \"baseSeverity\": \"HIGH\", \"vectorString\": \"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H\", \"integrityImpact\": \"NONE\", \"userInteraction\": \"NONE\", \"attackComplexity\": \"LOW\", \"availabilityImpact\": \"HIGH\", \"privilegesRequired\": \"NONE\", \"confidentialityImpact\": \"NONE\"}}, {\"other\": {\"type\": \"ssvc\", \"content\": {\"id\": \"CVE-2025-65637\", \"role\": \"CISA Coordinator\", \"options\": [{\"Exploitation\": \"none\"}, {\"Automatable\": \"no\"}, {\"Technical Impact\": \"partial\"}], \"version\": \"2.0.3\", \"timestamp\": \"2025-12-05T21:52:30.561592Z\"}}}], \"problemTypes\": [{\"descriptions\": [{\"lang\": \"en\", \"type\": \"CWE\", \"cweId\": \"CWE-400\", \"description\": \"CWE-400 Uncontrolled Resource Consumption\"}]}], \"providerMetadata\": {\"orgId\": \"134c704f-9b21-4f2e-91b3-4a467353bcc0\", \"shortName\": \"CISA-ADP\", \"dateUpdated\": \"2025-12-05T21:52:53.941Z\"}}], \"cna\": {\"affected\": [{\"vendor\": \"n/a\", \"product\": \"n/a\", \"versions\": [{\"status\": \"affected\", \"version\": \"n/a\"}]}], \"references\": [{\"url\": \"https://github.com/mjuanxd/logrus-dos-poc\"}, {\"url\": \"https://github.com/sirupsen/logrus/issues/1370\"}, {\"url\": \"https://github.com/sirupsen/logrus/pull/1376\"}, {\"url\": \"https://github.com/sirupsen/logrus/releases/tag/v1.8.3\"}, {\"url\": \"https://github.com/sirupsen/logrus/releases/tag/v1.9.1\"}, {\"url\": \"https://github.com/sirupsen/logrus/releases/tag/v1.9.3\"}, {\"url\": \"https://security.snyk.io/vuln/SNYK-GOLANG-GITHUBCOMSIRUPSENLOGRUS-5564391\"}, {\"url\": \"https://github.com/mjuanxd/logrus-dos-poc/blob/main/README.md\"}], \"descriptions\": [{\"lang\": \"en\", \"value\": \"A denial-of-service vulnerability exists in github.com/sirupsen/logrus when using Entry.Writer() to log a single-line payload larger than 64KB without newline characters. Due to limitations in the internal bufio.Scanner, the read fails with \\\"token too long\\\" and the writer pipe is closed, leaving Writer() unusable and causing application unavailability (DoS). This affects versions \u003c 1.8.3, 1.9.0, and 1.9.2. The issue is fixed in 1.8.3, 1.9.1, and 1.9.3+, where the input is chunked and the writer continues to function even if an error is logged.\"}], \"problemTypes\": [{\"descriptions\": [{\"lang\": \"en\", \"type\": \"text\", \"description\": \"n/a\"}]}], \"providerMetadata\": {\"orgId\": \"8254265b-2729-46b6-b9e3-3dfca2d5bfca\", \"shortName\": \"mitre\", \"dateUpdated\": \"2025-12-04T18:17:04.939Z\"}}}",
      "cveMetadata": "{\"cveId\": \"CVE-2025-65637\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2025-12-05T21:52:59.784Z\", \"dateReserved\": \"2025-11-18T00:00:00.000Z\", \"assignerOrgId\": \"8254265b-2729-46b6-b9e3-3dfca2d5bfca\", \"datePublished\": \"2025-12-04T00:00:00.000Z\", \"assignerShortName\": \"mitre\"}",
      "dataType": "CVE_RECORD",
      "dataVersion": "5.2"
    }
  }
}



Log in or create an account to share your comment.




Tags
Taxonomy of the tags.





Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

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.