CVE-2026-118763

Full vulnerability record from the local CVENow database.

Description

sigstore-js provides JavaScript libraries for interacting with Sigstore services. Prior to 0.7.2, packages/oci/src/registry.ts contains a RegistryClient.signIn() method that stores registry Authorization and Docker configuration headers as defaults on a shared HTTP client, while RegistryClient.uploadBlob() sends a fresh PUT to an absolute blob-upload Location supplied by the registry without checking that its origin or scheme matches the registry. A malicious or compromised registry can therefore direct a user pushing an artifact through attachArtifactToImage() to an attacker-controlled host and receive the registry bearer token, Basic credentials, or custom authentication headers. Redirect-time header stripping does not prevent the leak because the cross-host PUT is a new explicit request rather than a followed redirect. This is a residual of CVE-2026-59891, whose fix changed credential selection in credentials.ts but did not constrain where credentials are sent from registry.ts. Version 0.7.2 fixes the issue by separating registry credentials from client-wide defaults and sending them only to the registry origin.

Severity

HIGH

CVSS score

7.4 (v3.1)

Vulnerability status

Received

Source identifier

[email protected]

Published

2026-10-29 17:18:07.230000

Last modified

2026-10-29 17:18:07.230000

View original CVE JSON

{
  "id": "CVE-2026-118763",
  "sourceIdentifier": "[email protected]",
  "published": "2026-10-29T17:18:07.230",
  "lastModified": "2026-10-29T17:18:07.230",
  "vulnStatus": "Received",
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "sigstore-js provides JavaScript libraries for interacting with Sigstore services. Prior to 0.7.2, packages/oci/src/registry.ts contains a RegistryClient.signIn() method that stores registry Authorization and Docker configuration headers as defaults on a shared HTTP client, while RegistryClient.uploadBlob() sends a fresh PUT to an absolute blob-upload Location supplied by the registry without checking that its origin or scheme matches the registry. A malicious or compromised registry can therefore direct a user pushing an artifact through attachArtifactToImage() to an attacker-controlled host and receive the registry bearer token, Basic credentials, or custom authentication headers. Redirect-time header stripping does not prevent the leak because the cross-host PUT is a new explicit request rather than a followed redirect. This is a residual of CVE-2026-59891, whose fix changed credential selection in credentials.ts but did not constrain where credentials are sent from registry.ts. Version 0.7.2 fixes the issue by separating registry credentials from client-wide defaults and sending them only to the registry origin."
    }
  ],
  "affected": [
    {
      "source": "[email protected]",
      "affectedData": [
        {
          "vendor": "sigstore",
          "product": "sigstore-js",
          "versions": [
            {
              "version": "< 0.7.2",
              "status": "affected"
            }
          ]
        }
      ]
    }
  ],
  "metrics": {
    "cvssMetricV31": [
      {
        "source": "[email protected]",
        "type": "Secondary",
        "cvssData": {
          "version": "3.1",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:N/A:N",
          "baseScore": 7.4,
          "baseSeverity": "HIGH",
          "attackVector": "NETWORK",
          "attackComplexity": "LOW",
          "privilegesRequired": "NONE",
          "userInteraction": "REQUIRED",
          "scope": "CHANGED",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "NONE",
          "availabilityImpact": "NONE"
        },
        "exploitabilityScore": 2.8,
        "impactScore": 4.0
      }
    ]
  },
  "weaknesses": [
    {
      "source": "[email protected]",
      "type": "Primary",
      "description": [
        {
          "lang": "en",
          "value": "CWE-522"
        }
      ]
    }
  ],
  "references": [
    {
      "url": "https://github.com/sigstore/sigstore-js/commit/b855f46cfe81f26481c6d3f4b333dfd00f2fd1b1",
      "source": "[email protected]"
    },
    {
      "url": "https://github.com/sigstore/sigstore-js/commit/e4ca65c3ab3c675456ab9b0bd04217ceccad3558",
      "source": "[email protected]"
    },
    {
      "url": "https://github.com/sigstore/sigstore-js/pull/1762",
      "source": "[email protected]"
    },
    {
      "url": "https://github.com/sigstore/sigstore-js/releases/tag/@sigstore/[email protected]",
      "source": "[email protected]"
    },
    {
      "url": "https://github.com/sigstore/sigstore-js/security/advisories/GHSA-j63v-mwhm-56jx",
      "source": "[email protected]"
    }
  ]
}