Vulnerability-Lookup

GHSA-WG2F-V5X6-M39R

Vulnerability from github – Published: 2026-08-24 12:31 – Updated: 2026-08-24 12:31

Details

Hugo's security.http.urls allowlist is the only control on outbound fetches made by resources.GetRemote, and it inspects the URL text alone. CheckAllowedHTTPURL in config/security/securityConfig.go applies the configured pattern list and then re-checks a canonicalised form of an integer, hex or octal IPv4 host, but it never resolves the hostname and never inspects the address the HTTP client actually connects to. The client constructed in resources/resource_factories/create/create.go installs no dial-time hook, so no check occurs at connection time either. A hostname that resolves to a loopback, private or cloud-metadata address therefore satisfies the policy, and the response body is embedded in the generated site. An attacker who can supply a URL through content, for example a front-matter field or a CMS field, can make the build fetch an internal endpoint and publish the response in the static output, so the build artifact itself carries the data out.

Severity

7.4 (High)


                  
                    CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:N/A:N

8.3 (High)


                  
                    CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:H/VI:N/VA:N/SC:H/SI:N/SA:N

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JSON

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{
  "affected": [],
  "aliases": [
    "CVE-2026-10582"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-918"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-08-24T11:16:38Z",
    "severity": "HIGH"
  },
  "details": "Hugo\u0027s security.http.urls allowlist is the only control on outbound fetches made by resources.GetRemote, and it inspects the URL text alone. CheckAllowedHTTPURL in config/security/securityConfig.go applies the configured pattern list and then re-checks a canonicalised form of an integer, hex or octal IPv4 host, but it never resolves the hostname and never inspects the address the HTTP client actually connects to. The client constructed in resources/resource_factories/create/create.go installs no dial-time hook, so no check occurs at connection time either. A hostname that resolves to a loopback, private or cloud-metadata address therefore satisfies the policy, and the response body is embedded in the generated site. An attacker who can supply a URL through content, for example a front-matter field or a CMS field, can make the build fetch an internal endpoint and publish the response in the static output, so the build artifact itself carries the data out.",
  "id": "GHSA-wg2f-v5x6-m39r",
  "modified": "2026-08-24T12:31:38Z",
  "published": "2026-08-24T12:31:38Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-10582"
    },
    {
      "type": "WEB",
      "url": "https://github.com/gohugoio/hugo"
    },
    {
      "type": "WEB",
      "url": "https://github.com/gohugoio/hugo/blob/v0.165.0/config/security/securityConfig.go"
    },
    {
      "type": "WEB",
      "url": "https://github.com/gohugoio/hugo/blob/v0.165.0/resources/resource_factories/create/create.go"
    },
    {
      "type": "WEB",
      "url": "https://www.vulncheck.com/advisories/hugo-through-server-side-request-forgery-via-security-http-urls-lacking-destination-address-validation"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:N/A:N",
      "type": "CVSS_V3"
    },
    {
      "score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:H/VI:N/VA:N/SC:H/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X",
      "type": "CVSS_V4"
    }
  ]
}

CVE-2026-10582 (GCVE-0-2026-10582)

Vulnerability from cvelistv5 – Published: 2026-08-24 10:29 – Updated: 2026-08-24 18:59

Title

Hugo 0.91.0 through 0.165.0 Server-Side Request Forgery via security.http.urls Lacking Destination Address Validation

Summary

Severity

8.3 (High)


                        
                          CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:H/VI:N/VA:N/SC:H/SI:N/SA:N

7.4 (High)


                        
                          CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:N/A:N

SSVC

Exploitation: none Automatable: no Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-08-24 18:59 UTC

CWE

CWE-918 - Server-Side Request Forgery (SSRF)

Assigner

VulnCheck mitre root

References

4 references

URL	Tags
https://github.com/gohugoio/hugo	product
https://github.com/gohugoio/hugo/blob/v0.165.0/co…	technical-description
https://github.com/gohugoio/hugo/blob/v0.165.0/re…	technical-description
https://www.vulncheck.com/advisories/hugo-through…	third-party-advisory

Impacted products

1 product

Vendor	Product	Version
gohugoio	hugo	Affected: 0.91.0 , ≤ 0.165.0 (semver) cpe:2.3:a:gohugo:hugo::::::::

Date Public

2026-08-12 00:00

Credits

Michael Holmquist

Show details on NVD website

JSON

To clipboard

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  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2026-10582",
                "options": [
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                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-08-24T18:59:29.076098Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
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          "dateUpdated": "2026-08-24T18:59:36.842Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
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          "versions": [
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              "lessThanOrEqual": "0.165.0",
              "status": "affected",
              "version": "0.91.0",
              "versionType": "semver"
            }
          ]
        }
      ],
      "cpeApplicability": [
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      "metrics": [
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            "privilegesRequired": "NONE",
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      "references": [
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          "url": "https://github.com/gohugoio/hugo"
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          "url": "https://github.com/gohugoio/hugo/blob/v0.165.0/config/security/securityConfig.go"
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          "url": "https://github.com/gohugoio/hugo/blob/v0.165.0/resources/resource_factories/create/create.go"
        },
        {
          "name": "VulnCheck Advisory: Hugo 0.91.0 through 0.165.0 Server-Side Request Forgery via security.http.urls Lacking Destination Address Validation",
          "tags": [
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          ],
          "url": "https://www.vulncheck.com/advisories/hugo-through-server-side-request-forgery-via-security-http-urls-lacking-destination-address-validation"
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    "datePublished": "2026-08-24T10:29:09.560Z",
    "dateReserved": "2026-06-01T18:07:48.223Z",
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    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

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.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.

Action not permitted

GHSA-WG2F-V5X6-M39R

CVE-2026-10582 (GCVE-0-2026-10582)

Tags

Sightings

Nomenclature