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CVE-2026-71557

Status: Awaiting AnalysisMedium (6.3)—

go-git is an extensible git implementation library written in pure Go. Prior to 5.19.2 and 6.0.0-alpha.5, reference names are not sanitized before being used to construct on-disk paths under the reference storage directory, so a maliciously crafted reference name (for example containing directory-traversal sequences) can cause go-git to write files outside the intended reference storage directory. Versions 5.19.2 and 6.0.0-alpha.5 fix the issue.

CVSS

Exploitation probability (EPSS)

EPSS (Exploit Prediction Scoring System, FIRST) estimates how likely a vulnerability is to be exploited in the wild within 30 days. It complements CVSS (impact) and CISA KEV (confirmed exploitation).

Affected technologies (1)

⚠ AI-inferred from the description — NVD hasn't analyzed this CVE yet, these aren't verified CPEs.

Go-git — Go-gitAI

CWEs

References

Raw JSON (NVD)

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{
  "id": "CVE-2026-71557",
  "cveTags": [],
  "metrics": {
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2026-71557",
          "role": "CISA Coordinator",
          "options": [
            {
              "exploitation": "none"
            },
            {
              "automatable": "no"
            },
            {
              "technicalImpact": "partial"
            }
          ],
          "version": "2.0.3",
          "timestamp": "2026-08-07T17:53:21.966734Z"
        }
      }
    ],
    "cvssMetricV31": [
      {
        "type": "Secondary",
        "source": "security-advisories@github.com",
        "cvssData": {
          "scope": "UNCHANGED",
          "version": "3.1",
          "baseScore": 6.3,
          "attackVector": "NETWORK",
          "baseSeverity": "MEDIUM",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:N/I:H/A:L",
          "integrityImpact": "HIGH",
          "userInteraction": "REQUIRED",
          "attackComplexity": "LOW",
          "availabilityImpact": "LOW",
          "privilegesRequired": "LOW",
          "confidentialityImpact": "NONE"
        },
        "impactScore": 4.2,
        "exploitabilityScore": 2.1
      }
    ]
  },
  "affected": [
    {
      "source": "security-advisories@github.com",
      "affectedData": [
        {
          "vendor": "go-git",
          "product": "go-git",
          "versions": [
            {
              "status": "affected",
              "version": "< 5.19.2"
            },
            {
              "status": "affected",
              "version": ">= 6.0.0-alpha.1, < 6.0.0-alpha.5"
            }
          ]
        }
      ]
    }
  ],
  "published": "2026-08-07T17:17:10.833",
  "references": [
    {
      "url": "https://github.com/go-git/go-git/commit/4a0e66d555de5f9a30c31e2df64f445f42bd01e7",
      "source": "security-advisories@github.com"
    },
    {
      "url": "https://github.com/go-git/go-git/commit/da9f7d8a0e98b475600177348d6ece384a370f36",
      "source": "security-advisories@github.com"
    },
    {
      "url": "https://github.com/go-git/go-git/pull/2247",
      "source": "security-advisories@github.com"
    },
    {
      "url": "https://github.com/go-git/go-git/pull/2254",
      "source": "security-advisories@github.com"
    },
    {
      "url": "https://github.com/go-git/go-git/releases/tag/v5.19.2",
      "source": "security-advisories@github.com"
    },
    {
      "url": "https://github.com/go-git/go-git/releases/tag/v6.0.0-alpha.5",
      "source": "security-advisories@github.com"
    },
    {
      "url": "https://github.com/go-git/go-git/security/advisories/GHSA-qgq7-7hm3-q39j",
      "source": "security-advisories@github.com"
    }
  ],
  "vulnStatus": "Awaiting Analysis",
  "weaknesses": [
    {
      "type": "Secondary",
      "source": "security-advisories@github.com",
      "description": [
        {
          "lang": "en",
          "value": "CWE-22"
        }
      ]
    }
  ],
  "descriptions": [
    {
      "lang": "en",
      "value": "go-git is an extensible git implementation library written in pure Go. Prior to 5.19.2 and 6.0.0-alpha.5, reference names are not sanitized before being used to construct on-disk paths under the reference storage directory, so a maliciously crafted reference name (for example containing directory-traversal sequences) can cause go-git to write files outside the intended reference storage directory. Versions 5.19.2 and 6.0.0-alpha.5 fix the issue."
    }
  ],
  "lastModified": "2026-09-10T20:41:33.140",
  "sourceIdentifier": "security-advisories@github.com"
}