FKIE_CVE-2026-62999

Vulnerability from fkie_nvd - Published: 2026-07-31 20:16 - Updated: 2026-07-31 20:16
Severity
7.5 (High) - CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H
Summary
Copier is a library and CLI app for rendering project templates. From 9.5.0 through 9.16.0, percent-encoded parent-directory segments or encoded path separators in a template URL can match a configured trusted repository prefix before an HTTP server or Git transport decodes the path, allowing unsafe template features from a repository outside the trusted prefix to run after user interaction. This issue is fixed in version 9.17.0.
References
security-advisories@github.comhttps://github.com/copier-org/copier/commit/7408f0d6287a7bf452715fd9f25dc54eaba3c295
security-advisories@github.comhttps://github.com/copier-org/copier/releases/tag/v9.17.0
security-advisories@github.comhttps://github.com/copier-org/copier/security/advisories/GHSA-34mv-rjq9-5mch
134c704f-9b21-4f2e-91b3-4a467353bcc0https://github.com/copier-org/copier/security/advisories/GHSA-34mv-rjq9-5mch
Impacted products
Vendor Product Version
To clipboard 

{
  "affected": [
    {
      "affectedData": [
        {
          "product": "copier",
          "vendor": "copier-org",
          "versions": [
            {
              "status": "affected",
              "version": "\u003e= 9.5.0, \u003c= 9.16.0"
            }
          ]
        }
      ],
      "source": "security-advisories@github.com"
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "Copier is a library and CLI app for rendering project templates. From 9.5.0 through 9.16.0, percent-encoded parent-directory segments or encoded path separators in a template URL can match a configured trusted repository prefix before an HTTP server or Git transport decodes the path, allowing unsafe template features from a repository outside the trusted prefix to run after user interaction. This issue is fixed in version 9.17.0."
    }
  ],
  "id": "CVE-2026-62999",
  "lastModified": "2026-07-31T20:16:53.523",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "HIGH",
          "attackVector": "NETWORK",
          "availabilityImpact": "HIGH",
          "baseScore": 7.5,
          "baseSeverity": "HIGH",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "HIGH",
          "privilegesRequired": "NONE",
          "scope": "UNCHANGED",
          "userInteraction": "REQUIRED",
          "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H",
          "version": "3.1"
        },
        "exploitabilityScore": 1.6,
        "impactScore": 5.9,
        "source": "security-advisories@github.com",
        "type": "Secondary"
      }
    ],
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2026-62999",
          "options": [
            {
              "exploitation": "poc"
            },
            {
              "automatable": "no"
            },
            {
              "technicalImpact": "total"
            }
          ],
          "role": "CISA Coordinator",
          "timestamp": "2026-07-31T19:59:06.929791Z",
          "version": "2.0.3"
        }
      }
    ]
  },
  "published": "2026-07-31T20:16:53.523",
  "references": [
    {
      "source": "security-advisories@github.com",
      "url": "https://github.com/copier-org/copier/commit/7408f0d6287a7bf452715fd9f25dc54eaba3c295"
    },
    {
      "source": "security-advisories@github.com",
      "url": "https://github.com/copier-org/copier/releases/tag/v9.17.0"
    },
    {
      "source": "security-advisories@github.com",
      "url": "https://github.com/copier-org/copier/security/advisories/GHSA-34mv-rjq9-5mch"
    },
    {
      "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
      "url": "https://github.com/copier-org/copier/security/advisories/GHSA-34mv-rjq9-5mch"
    }
  ],
  "sourceIdentifier": "security-advisories@github.com",
  "vulnStatus": "Received",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-22"
        },
        {
          "lang": "en",
          "value": "CWE-180"
        }
      ],
      "source": "security-advisories@github.com",
      "type": "Primary"
    }
  ]
}



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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.
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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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