GHSA-JHF3-XXHW-2WPP

Vulnerability from github – Published: 2026-03-30 17:17 – Updated: 2026-03-31 18:50
VLAI?
Summary
go-git: Maliciously crafted idx file can cause asymmetric memory consumption
Details

Impact

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.

Patches

Users should upgrade to v5.17.1, or the latest v6 pseudo-version, in order to mitigate this vulnerability.

Credit

The go-git maintainers thank @kq5y for finding and reporting this issue privately to the go-git project.

Severity ?
5.0 (Medium)
CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:N/I:N/A:H
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{
  "affected": [
    {
      "database_specific": {
        "last_known_affected_version_range": "\u003c= 5.17.0"
      },
      "package": {
        "ecosystem": "Go",
        "name": "github.com/go-git/go-git/v5"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "5.0.0"
            },
            {
              "fixed": "5.17.1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2026-34165"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-191",
      "CWE-770"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2026-03-30T17:17:54Z",
    "nvd_published_at": "2026-03-31T15:16:17Z",
    "severity": "MODERATE"
  },
  "details": "### Impact\n\nA 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.\n\nExploitation requires write access to the local repository\u0027s `.git` directory, it order to create or alter existing `.idx` files. \n\n### Patches\n\nUsers should upgrade to `v5.17.1`, or the latest `v6` [pseudo-version](https://go.dev/ref/mod#pseudo-versions), in order to mitigate this vulnerability.\n\n### Credit\n\nThe go-git maintainers thank @kq5y for finding and reporting this issue privately to the `go-git` project.",
  "id": "GHSA-jhf3-xxhw-2wpp",
  "modified": "2026-03-31T18:50:40Z",
  "published": "2026-03-30T17:17:54Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/go-git/go-git/security/advisories/GHSA-jhf3-xxhw-2wpp"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-34165"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/go-git/go-git"
    },
    {
      "type": "WEB",
      "url": "https://github.com/go-git/go-git/releases/tag/v5.17.1"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:N/I:N/A:H",
      "type": "CVSS_V3"
    }
  ],
  "summary": "go-git: Maliciously crafted idx file can cause asymmetric memory consumption"
}


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  • Confirmed: The vulnerability has been validated from an analyst's perspective.
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  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.



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