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CVE-2026-39399 (GCVE-0-2026-39399)

Vulnerability from nvd – Published: 2026-04-14 23:01 – Updated: 2026-04-15 14:42

Title

NuGet Gallery: Arbitrary Blob Overwrite via Nuspec Confusion and URI Fragment Truncation

Summary

NuGet Gallery is a package repository that powers nuget.org. A security vulnerability exists in the NuGetGallery backend job’s handling of .nuspec files within NuGet packages. An attacker can supply a crafted nuspec file with malicious metadata, leading to cross package metadata injection that may result in remote code execution (RCE) and/or arbitrary blob writes due to insufficient input validation. The issue is exploitable via URI fragment injection using unsanitized package identifiers, allowing an attacker to control the resolved blob path. This enables writes to arbitrary blobs within the storage container, not limited to .nupkg files, resulting in potential tampering of existing content. This issue has been patched in commit 0e80f87628349207cdcaf55358491f8a6f1ca276.

Severity

9.6 (Critical)


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

SSVC

Exploitation: none Automatable: no Technical Impact: partial

CISA Coordinator (v2.0.3)

CWE

CWE-20 - Improper Input Validation
CWE-22 - Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')

Assigner

GitHub_M

References

2 references

URL	Tags
https://github.com/NuGet/NuGetGallery/security/ad…	x_refsource_CONFIRM
https://github.com/NuGet/NuGetGallery/commit/0e80…	x_refsource_MISC

Impacted products

1 product

Vendor	Product	Version
NuGet	NuGetGallery	Affected: < 0e80f87628349207cdcaf55358491f8a6f1ca276

Show details on NVD website

JSON

To clipboard

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                "id": "CVE-2026-39399",
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CVE-2024-54138 (GCVE-0-2024-54138)

Vulnerability from nvd – Published: 2024-12-06 21:56 – Updated: 2024-12-10 14:38

Title

XSS Vulnerability in NuGetGallery's Markdown Autolinks Processing

Summary

NuGet Gallery is a package repository that powers nuget.org. The NuGetGallery has a security vulnerability related to its handling of autolinks in Markdown content. While the platform properly filters out JavaScript from standard links, it does not adequately sanitize autolinks. This oversight allows attackers to exploit autolinks as a vector for Cross-Site Scripting (XSS) attacks. This vulnerability is fixed in 2024.12.06.

Severity

6.9 (Medium)


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

SSVC

Exploitation: none Automatable: yes Technical Impact: partial

CISA Coordinator (v2.0.3)

CWE

CWE-79 - Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

Assigner

GitHub_M

References

2 references

URL	Tags
https://github.com/NuGet/NuGetGallery/security/ad…	x_refsource_CONFIRM
https://github.com/NuGet/NuGetGallery/pull/10296	x_refsource_MISC

Impacted products

2 products

Vendor	Product	Version
NuGet	NuGetGallery	Affected: < 2024.12.06
nuget	nugetgallery	Affected: 0 , < 2024.12.06 (custom) cpe:2.3:a:nuget:nugetgallery::::::::

Show details on NVD website

JSON

To clipboard

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CVE-2024-47604 (GCVE-0-2024-47604)

Vulnerability from nvd – Published: 2024-10-01 15:26 – Updated: 2024-10-01 17:13

Title

XSS vulnerability in NuGetGallery HTML attributes handling

Summary

NuGet Gallery is a package repository that powers nuget.org. The NuGetGallery has a security vulnerability in its handling of HTML element attributes, which allows an attacker to execute arbitrary HTML or Javascript code in a victim's browser.

Severity

8.2 (High)


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

SSVC

Exploitation: none Automatable: no Technical Impact: partial

CISA Coordinator (v2.0.3)

CWE

CWE-79 - Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

Assigner

GitHub_M

References

3 references

URL	Tags
https://github.com/NuGet/NuGetGallery/security/ad…	x_refsource_CONFIRM
https://github.com/NuGet/NuGetGallery/pull/10193	x_refsource_MISC
https://github.com/NuGet/NuGetGallery/commit/3a18…	x_refsource_MISC

Impacted products

1 product

Vendor	Product	Version
NuGet	NuGetGallery	Affected: > 2024.06.21, <= 2024.09.25

Show details on NVD website

JSON

To clipboard

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CVE-2024-37304 (GCVE-0-2024-37304)

Vulnerability from nvd – Published: 2024-06-12 14:27 – Updated: 2024-08-02 03:50

Title

NuGetGallery's Markdown Autolinks Processing Vulnerable to Cross-site Scripting

Summary

NuGet Gallery is a package repository that powers nuget.org. The NuGetGallery has a security vulnerability related to its handling of autolinks in Markdown content. While the platform properly filters out JavaScript from standard links, it does not adequately sanitize autolinks. This oversight allows attackers to exploit autolinks as a vector for Cross-Site Scripting (XSS) attacks. When a user inputs a Markdown autolink such as `<javascript:alert(1)>`, the link is rendered without proper sanitization. This means that the JavaScript code within the autolink can be executed by the browser, leading to an XSS attack. Version 2024.05.28 contains a patch for this issue.

Severity

6.1 (Medium)


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

SSVC

Exploitation: none Automatable: no Technical Impact: partial

CISA Coordinator (v2.0.3)

CWE

CWE-79 - Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

Assigner

GitHub_M

References

3 references

URL	Tags
https://github.com/NuGet/NuGetGallery/security/ad…	x_refsource_CONFIRM
https://github.com/NuGet/NuGetGallery/pull/9836	x_refsource_MISC
https://github.com/NuGet/NuGetGallery/commit/c52b…	x_refsource_MISC

Impacted products

1 product

Vendor	Product	Version
NuGet	NuGetGallery	Affected: < 2024.05.28

Show details on NVD website

JSON

To clipboard

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CVE-2026-39399 (GCVE-0-2026-39399)

Vulnerability from cvelistv5 – Published: 2026-04-14 23:01 – Updated: 2026-04-15 14:42

Title

NuGet Gallery: Arbitrary Blob Overwrite via Nuspec Confusion and URI Fragment Truncation

Summary

NuGet Gallery is a package repository that powers nuget.org. A security vulnerability exists in the NuGetGallery backend job’s handling of .nuspec files within NuGet packages. An attacker can supply a crafted nuspec file with malicious metadata, leading to cross package metadata injection that may result in remote code execution (RCE) and/or arbitrary blob writes due to insufficient input validation. The issue is exploitable via URI fragment injection using unsanitized package identifiers, allowing an attacker to control the resolved blob path. This enables writes to arbitrary blobs within the storage container, not limited to .nupkg files, resulting in potential tampering of existing content. This issue has been patched in commit 0e80f87628349207cdcaf55358491f8a6f1ca276.

Severity

9.6 (Critical)


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

SSVC

Exploitation: none Automatable: no Technical Impact: partial

CISA Coordinator (v2.0.3)

CWE

CWE-20 - Improper Input Validation
CWE-22 - Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')

Assigner

GitHub_M

References

2 references

URL	Tags
https://github.com/NuGet/NuGetGallery/security/ad…	x_refsource_CONFIRM
https://github.com/NuGet/NuGetGallery/commit/0e80…	x_refsource_MISC

Impacted products

1 product

Vendor	Product	Version
NuGet	NuGetGallery	Affected: < 0e80f87628349207cdcaf55358491f8a6f1ca276

Show details on NVD website

JSON

To clipboard

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CVE-2024-54138 (GCVE-0-2024-54138)

Vulnerability from cvelistv5 – Published: 2024-12-06 21:56 – Updated: 2024-12-10 14:38

Title

XSS Vulnerability in NuGetGallery's Markdown Autolinks Processing

Summary

NuGet Gallery is a package repository that powers nuget.org. The NuGetGallery has a security vulnerability related to its handling of autolinks in Markdown content. While the platform properly filters out JavaScript from standard links, it does not adequately sanitize autolinks. This oversight allows attackers to exploit autolinks as a vector for Cross-Site Scripting (XSS) attacks. This vulnerability is fixed in 2024.12.06.

Severity

6.9 (Medium)


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

SSVC

Exploitation: none Automatable: yes Technical Impact: partial

CISA Coordinator (v2.0.3)

CWE

CWE-79 - Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

Assigner

GitHub_M

References

2 references

URL	Tags
https://github.com/NuGet/NuGetGallery/security/ad…	x_refsource_CONFIRM
https://github.com/NuGet/NuGetGallery/pull/10296	x_refsource_MISC

Impacted products

2 products

Vendor	Product	Version
NuGet	NuGetGallery	Affected: < 2024.12.06
nuget	nugetgallery	Affected: 0 , < 2024.12.06 (custom) cpe:2.3:a:nuget:nugetgallery::::::::

Show details on NVD website

JSON

To clipboard

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CVE-2024-47604 (GCVE-0-2024-47604)

Vulnerability from cvelistv5 – Published: 2024-10-01 15:26 – Updated: 2024-10-01 17:13

Title

XSS vulnerability in NuGetGallery HTML attributes handling

Summary

NuGet Gallery is a package repository that powers nuget.org. The NuGetGallery has a security vulnerability in its handling of HTML element attributes, which allows an attacker to execute arbitrary HTML or Javascript code in a victim's browser.

Severity

8.2 (High)


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

SSVC

Exploitation: none Automatable: no Technical Impact: partial

CISA Coordinator (v2.0.3)

CWE

CWE-79 - Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

Assigner

GitHub_M

References

3 references

URL	Tags
https://github.com/NuGet/NuGetGallery/security/ad…	x_refsource_CONFIRM
https://github.com/NuGet/NuGetGallery/pull/10193	x_refsource_MISC
https://github.com/NuGet/NuGetGallery/commit/3a18…	x_refsource_MISC

Impacted products

1 product

Vendor	Product	Version
NuGet	NuGetGallery	Affected: > 2024.06.21, <= 2024.09.25

Show details on NVD website

JSON

To clipboard

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CVE-2024-37304 (GCVE-0-2024-37304)

Vulnerability from cvelistv5 – Published: 2024-06-12 14:27 – Updated: 2024-08-02 03:50

Title

NuGetGallery's Markdown Autolinks Processing Vulnerable to Cross-site Scripting

Summary

NuGet Gallery is a package repository that powers nuget.org. The NuGetGallery has a security vulnerability related to its handling of autolinks in Markdown content. While the platform properly filters out JavaScript from standard links, it does not adequately sanitize autolinks. This oversight allows attackers to exploit autolinks as a vector for Cross-Site Scripting (XSS) attacks. When a user inputs a Markdown autolink such as `<javascript:alert(1)>`, the link is rendered without proper sanitization. This means that the JavaScript code within the autolink can be executed by the browser, leading to an XSS attack. Version 2024.05.28 contains a patch for this issue.

Severity

6.1 (Medium)


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

SSVC

Exploitation: none Automatable: no Technical Impact: partial

CISA Coordinator (v2.0.3)

CWE

CWE-79 - Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

Assigner

GitHub_M

References

3 references

URL	Tags
https://github.com/NuGet/NuGetGallery/security/ad…	x_refsource_CONFIRM
https://github.com/NuGet/NuGetGallery/pull/9836	x_refsource_MISC
https://github.com/NuGet/NuGetGallery/commit/c52b…	x_refsource_MISC

Impacted products

1 product

Vendor	Product	Version
NuGet	NuGetGallery	Affected: < 2024.05.28

Show details on NVD website

JSON

To clipboard

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            "url": "https://github.com/NuGet/NuGetGallery/commit/c52b023659f4ad7b626874c1063f2b5e878a4fe0"
          }
        ],
        "title": "CVE Program Container"
      }
    ],
    "cna": {
      "affected": [
        {
          "product": "NuGetGallery",
          "vendor": "NuGet",
          "versions": [
            {
              "status": "affected",
              "version": "\u003c 2024.05.28"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "NuGet Gallery is a package repository that powers nuget.org. The NuGetGallery has a security vulnerability related to its handling of autolinks in Markdown content. While the platform properly filters out JavaScript from standard links, it does not adequately sanitize autolinks. This oversight allows attackers to exploit autolinks as a vector for Cross-Site Scripting (XSS) attacks. When a user inputs a Markdown autolink such as `\u003cjavascript:alert(1)\u003e`, the link is rendered without proper sanitization. This means that the JavaScript code within the autolink can be executed by the browser, leading to an XSS attack. Version 2024.05.28 contains a patch for this issue."
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "attackComplexity": "LOW",
            "attackVector": "NETWORK",
            "availabilityImpact": "NONE",
            "baseScore": 6.1,
            "baseSeverity": "MEDIUM",
            "confidentialityImpact": "LOW",
            "integrityImpact": "LOW",
            "privilegesRequired": "NONE",
            "scope": "CHANGED",
            "userInteraction": "REQUIRED",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N",
            "version": "3.1"
          }
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-79",
              "description": "CWE-79: Improper Neutralization of Input During Web Page Generation (\u0027Cross-site Scripting\u0027)",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2024-06-12T14:27:40.184Z",
        "orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
        "shortName": "GitHub_M"
      },
      "references": [
        {
          "name": "https://github.com/NuGet/NuGetGallery/security/advisories/GHSA-gwjh-c548-f787",
          "tags": [
            "x_refsource_CONFIRM"
          ],
          "url": "https://github.com/NuGet/NuGetGallery/security/advisories/GHSA-gwjh-c548-f787"
        },
        {
          "name": "https://github.com/NuGet/NuGetGallery/pull/9836",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/NuGet/NuGetGallery/pull/9836"
        },
        {
          "name": "https://github.com/NuGet/NuGetGallery/commit/c52b023659f4ad7b626874c1063f2b5e878a4fe0",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/NuGet/NuGetGallery/commit/c52b023659f4ad7b626874c1063f2b5e878a4fe0"
        }
      ],
      "source": {
        "advisory": "GHSA-gwjh-c548-f787",
        "discovery": "UNKNOWN"
      },
      "title": "NuGetGallery\u0027s Markdown Autolinks Processing Vulnerable to Cross-site Scripting"
    }
  },
  "cveMetadata": {
    "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
    "assignerShortName": "GitHub_M",
    "cveId": "CVE-2024-37304",
    "datePublished": "2024-06-12T14:27:40.184Z",
    "dateReserved": "2024-06-05T20:10:46.497Z",
    "dateUpdated": "2024-08-02T03:50:55.991Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.1"
}

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8 vulnerabilities by NuGet

CVE-2026-39399 (GCVE-0-2026-39399)

CVE-2024-54138 (GCVE-0-2024-54138)

CVE-2024-47604 (GCVE-0-2024-47604)

CVE-2024-37304 (GCVE-0-2024-37304)

CVE-2026-39399 (GCVE-0-2026-39399)

CVE-2024-54138 (GCVE-0-2024-54138)

CVE-2024-47604 (GCVE-0-2024-47604)

CVE-2024-37304 (GCVE-0-2024-37304)