CVE-2026-34165 (GCVE-0-2026-34165)

Vulnerability from cvelistv5 – Published: 2026-03-31 13:46 – Updated: 2026-04-02 15:10
VLAI
Title
go-git: Maliciously crafted idx file can cause asymmetric memory consumption
Summary
go-git is an extensible git implementation library written in pure Go. From version 5.0.0 to before version 5.17.1, a vulnerability has been identified in which a maliciously crafted .idx file can cause asymmetric memory consumption, potentially exhausting available memory and resulting in a denial-of-service (DoS) condition. Exploitation requires write access to the local repository's .git directory, it order to create or alter existing .idx files. This issue has been patched in version 5.17.1.
Severity
5 (Medium)
CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:N/I:N/A:H
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
  • CWE-191 - Integer Underflow (Wrap or Wraparound)
  • CWE-770 - Allocation of Resources Without Limits or Throttling
Assigner
References
Impacted products
Vendor Product Version
go-git go-git Affected: >= 5.0.0, < 5.17.1
Create a notification for this product.
Show details on NVD website
To clipboard 

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2026-34165",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-04-02T15:09:59.782648Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2026-04-02T15:10:17.724Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "product": "go-git",
          "vendor": "go-git",
          "versions": [
            {
              "status": "affected",
              "version": "\u003e= 5.0.0, \u003c 5.17.1"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "go-git is an extensible git implementation library written in pure Go. From version 5.0.0 to before version 5.17.1, a vulnerability has been identified in which a maliciously crafted .idx file can cause asymmetric memory consumption, potentially exhausting available memory and resulting in a denial-of-service (DoS) condition. Exploitation requires write access to the local repository\u0027s .git directory, it order to create or alter existing .idx files. This issue has been patched in version 5.17.1."
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "attackComplexity": "LOW",
            "attackVector": "LOCAL",
            "availabilityImpact": "HIGH",
            "baseScore": 5,
            "baseSeverity": "MEDIUM",
            "confidentialityImpact": "NONE",
            "integrityImpact": "NONE",
            "privilegesRequired": "LOW",
            "scope": "UNCHANGED",
            "userInteraction": "REQUIRED",
            "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:N/I:N/A:H",
            "version": "3.1"
          }
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-191",
              "description": "CWE-191: Integer Underflow (Wrap or Wraparound)",
              "lang": "en",
              "type": "CWE"
            }
          ]
        },
        {
          "descriptions": [
            {
              "cweId": "CWE-770",
              "description": "CWE-770: Allocation of Resources Without Limits or Throttling",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-03-31T13:46:37.688Z",
        "orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
        "shortName": "GitHub_M"
      },
      "references": [
        {
          "name": "https://github.com/go-git/go-git/security/advisories/GHSA-jhf3-xxhw-2wpp",
          "tags": [
            "x_refsource_CONFIRM"
          ],
          "url": "https://github.com/go-git/go-git/security/advisories/GHSA-jhf3-xxhw-2wpp"
        },
        {
          "name": "https://github.com/go-git/go-git/releases/tag/v5.17.1",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/go-git/go-git/releases/tag/v5.17.1"
        }
      ],
      "source": {
        "advisory": "GHSA-jhf3-xxhw-2wpp",
        "discovery": "UNKNOWN"
      },
      "title": "go-git: Maliciously crafted idx file can cause asymmetric memory consumption"
    }
  },
  "cveMetadata": {
    "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
    "assignerShortName": "GitHub_M",
    "cveId": "CVE-2026-34165",
    "datePublished": "2026-03-31T13:46:37.688Z",
    "dateReserved": "2026-03-25T20:12:04.197Z",
    "dateUpdated": "2026-04-02T15:10:17.724Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
    "epss": {
      "cve": "CVE-2026-34165",
      "date": "2026-07-25",
      "epss": "0.00147",
      "percentile": "0.04411"
    },
    "nvd": "{\"cve\":{\"id\":\"CVE-2026-34165\",\"sourceIdentifier\":\"security-advisories@github.com\",\"published\":\"2026-03-31T15:16:17.343\",\"lastModified\":\"2026-07-24T21:10:00.143\",\"vulnStatus\":\"Analyzed\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"go-git is an extensible git implementation library written in pure Go. From version 5.0.0 to before version 5.17.1, a vulnerability has been identified in which a maliciously crafted .idx file can cause asymmetric memory consumption, potentially exhausting available memory and resulting in a denial-of-service (DoS) condition. Exploitation requires write access to the local repository\u0027s .git directory, it order to create or alter existing .idx files. This issue has been patched in version 5.17.1.\"},{\"lang\":\"es\",\"value\":\"go-git es una biblioteca de implementaci\u00f3n de git extensible escrita en Go puro. Desde la versi\u00f3n 5.0.0 hasta antes de la versi\u00f3n 5.17.1, se ha identificado una vulnerabilidad en la que un archivo .idx creado maliciosamente puede causar un consumo asim\u00e9trico de memoria, agotando potencialmente la memoria disponible y resultando en una condici\u00f3n de denegaci\u00f3n de servicio (DoS). La explotaci\u00f3n requiere acceso de escritura al directorio .git del repositorio local, para crear o alterar archivos .idx existentes. Este problema ha sido parcheado en la versi\u00f3n 5.17.1.\"}],\"affected\":[{\"source\":\"security-advisories@github.com\",\"affectedData\":[{\"vendor\":\"go-git\",\"product\":\"go-git\",\"versions\":[{\"version\":\"\u003e= 5.0.0, \u003c 5.17.1\",\"status\":\"affected\"}]}]}],\"metrics\":{\"cvssMetricV31\":[{\"source\":\"security-advisories@github.com\",\"type\":\"Secondary\",\"cvssData\":{\"version\":\"3.1\",\"vectorString\":\"CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:N/I:N/A:H\",\"baseScore\":5.0,\"baseSeverity\":\"MEDIUM\",\"attackVector\":\"LOCAL\",\"attackComplexity\":\"LOW\",\"privilegesRequired\":\"LOW\",\"userInteraction\":\"REQUIRED\",\"scope\":\"UNCHANGED\",\"confidentialityImpact\":\"NONE\",\"integrityImpact\":\"NONE\",\"availabilityImpact\":\"HIGH\"},\"exploitabilityScore\":1.3,\"impactScore\":3.6}],\"ssvcV203\":[{\"source\":\"134c704f-9b21-4f2e-91b3-4a467353bcc0\",\"ssvcData\":{\"timestamp\":\"2026-04-02T15:09:59.782648Z\",\"id\":\"CVE-2026-34165\",\"options\":[{\"exploitation\":\"none\"},{\"automatable\":\"no\"},{\"technicalImpact\":\"partial\"}],\"role\":\"CISA Coordinator\",\"version\":\"2.0.3\"}}]},\"weaknesses\":[{\"source\":\"security-advisories@github.com\",\"type\":\"Secondary\",\"description\":[{\"lang\":\"en\",\"value\":\"CWE-191\"},{\"lang\":\"en\",\"value\":\"CWE-770\"}]}],\"configurations\":[{\"nodes\":[{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":true,\"criteria\":\"cpe:2.3:a:go-git_project:go-git:*:*:*:*:*:go:*:*\",\"versionStartIncluding\":\"5.0.0\",\"versionEndExcluding\":\"5.17.1\",\"matchCriteriaId\":\"E220E9FE-E976-448B-813E-87BD0E67C712\"}]}]}],\"references\":[{\"url\":\"https://github.com/go-git/go-git/releases/tag/v5.17.1\",\"source\":\"security-advisories@github.com\",\"tags\":[\"Product\",\"Release Notes\"]},{\"url\":\"https://github.com/go-git/go-git/security/advisories/GHSA-jhf3-xxhw-2wpp\",\"source\":\"security-advisories@github.com\",\"tags\":[\"Vendor Advisory\"]}]}}",
    "redhat_vex": {
      "aggregate_severity": "Moderate",
      "current_release_date": "2026-06-30T11:47:35+00:00",
      "cve": "CVE-2026-34165",
      "id": "CVE-2026-34165",
      "initial_release_date": "2026-03-31T13:46:37.688000+00:00",
      "product_status:known_affected": "198",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "github.com/go-git/go-git/v5: go-git: Denial of Service via crafted .idx file",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-34165.json",
      "version": "3"
    },
    "suse_vex": {
      "aggregate_severity": "moderate",
      "current_release_date": "2026-04-09T23:25:51Z",
      "cve": "CVE-2026-34165",
      "id": "CVE-2026-34165",
      "initial_release_date": "2026-04-09T23:25:51Z",
      "product_status:recommended": "1",
      "source": "SUSE CSAF VEX",
      "status": "interim",
      "title": "SUSE CVE CVE-2026-34165",
      "url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2026-34165.json",
      "version": "2"
    },
    "vulnrichment": {
      "containers": "{\"adp\": [{\"title\": \"CISA ADP Vulnrichment\", \"metrics\": [{\"other\": {\"type\": \"ssvc\", \"content\": {\"id\": \"CVE-2026-34165\", \"role\": \"CISA Coordinator\", \"options\": [{\"Exploitation\": \"none\"}, {\"Automatable\": \"no\"}, {\"Technical Impact\": \"partial\"}], \"version\": \"2.0.3\", \"timestamp\": \"2026-04-02T15:09:59.782648Z\"}}}], \"providerMetadata\": {\"orgId\": \"134c704f-9b21-4f2e-91b3-4a467353bcc0\", \"shortName\": \"CISA-ADP\", \"dateUpdated\": \"2026-04-02T15:10:13.682Z\"}}], \"cna\": {\"title\": \"go-git: Maliciously crafted idx file can cause asymmetric memory consumption\", \"source\": {\"advisory\": \"GHSA-jhf3-xxhw-2wpp\", \"discovery\": \"UNKNOWN\"}, \"metrics\": [{\"cvssV3_1\": {\"scope\": \"UNCHANGED\", \"version\": \"3.1\", \"baseScore\": 5, \"attackVector\": \"LOCAL\", \"baseSeverity\": \"MEDIUM\", \"vectorString\": \"CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:N/I:N/A:H\", \"integrityImpact\": \"NONE\", \"userInteraction\": \"REQUIRED\", \"attackComplexity\": \"LOW\", \"availabilityImpact\": \"HIGH\", \"privilegesRequired\": \"LOW\", \"confidentialityImpact\": \"NONE\"}}], \"affected\": [{\"vendor\": \"go-git\", \"product\": \"go-git\", \"versions\": [{\"status\": \"affected\", \"version\": \"\u003e= 5.0.0, \u003c 5.17.1\"}]}], \"references\": [{\"url\": \"https://github.com/go-git/go-git/security/advisories/GHSA-jhf3-xxhw-2wpp\", \"name\": \"https://github.com/go-git/go-git/security/advisories/GHSA-jhf3-xxhw-2wpp\", \"tags\": [\"x_refsource_CONFIRM\"]}, {\"url\": \"https://github.com/go-git/go-git/releases/tag/v5.17.1\", \"name\": \"https://github.com/go-git/go-git/releases/tag/v5.17.1\", \"tags\": [\"x_refsource_MISC\"]}], \"descriptions\": [{\"lang\": \"en\", \"value\": \"go-git is an extensible git implementation library written in pure Go. From version 5.0.0 to before version 5.17.1, a vulnerability has been identified in which a maliciously crafted .idx file can cause asymmetric memory consumption, potentially exhausting available memory and resulting in a denial-of-service (DoS) condition. Exploitation requires write access to the local repository\u0027s .git directory, it order to create or alter existing .idx files. This issue has been patched in version 5.17.1.\"}], \"problemTypes\": [{\"descriptions\": [{\"lang\": \"en\", \"type\": \"CWE\", \"cweId\": \"CWE-191\", \"description\": \"CWE-191: Integer Underflow (Wrap or Wraparound)\"}]}, {\"descriptions\": [{\"lang\": \"en\", \"type\": \"CWE\", \"cweId\": \"CWE-770\", \"description\": \"CWE-770: Allocation of Resources Without Limits or Throttling\"}]}], \"providerMetadata\": {\"orgId\": \"a0819718-46f1-4df5-94e2-005712e83aaa\", \"shortName\": \"GitHub_M\", \"dateUpdated\": \"2026-03-31T13:46:37.688Z\"}}}",
      "cveMetadata": "{\"cveId\": \"CVE-2026-34165\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2026-04-02T15:10:17.724Z\", \"dateReserved\": \"2026-03-25T20:12:04.197Z\", \"assignerOrgId\": \"a0819718-46f1-4df5-94e2-005712e83aaa\", \"datePublished\": \"2026-03-31T13:46:37.688Z\", \"assignerShortName\": \"GitHub_M\"}",
      "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.