FKIE_CVE-2026-55553

Vulnerability from fkie_nvd - Published: 2026-08-25 17:17 - Updated: 2026-08-25 19:16
Severity
7.5 (High) - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Summary
urllib is an HTTP client for Node.js that supports authentication, redirects, timeouts, and other request features. Prior to 4.9.1 and 2.44.1, urllib follows redirects through followRedirect but reuses caller-supplied options across origins. In src/HttpClient.ts, #requestInternal recursively calls this.#requestInternal(nextUrl.href, options, requestContext), causing options.headers and auth or digestAuth values to be reused when the redirect target has a different scheme, host, or port. Authorization, Cookie, Proxy-Authorization, x-api-key, x-auth-token, and x-access-token can therefore be sent to an attacker-controlled redirected origin, exposing credentials intended for the original origin and potentially allowing reuse against the original partner API or related services. No user interaction is required. This issue is fixed in versions 2.44.1 and 4.9.1.
References
security-advisories@github.comhttps://github.com/node-modules/urllib/commit/7c86c465883ebd3dea5109c87d7bbe3b00960a16
security-advisories@github.comhttps://github.com/node-modules/urllib/commit/811a8d56e64e540bf6a19bf8b3737692f05d5c46
security-advisories@github.comhttps://github.com/node-modules/urllib/pull/812
security-advisories@github.comhttps://github.com/node-modules/urllib/pull/813
security-advisories@github.comhttps://github.com/node-modules/urllib/releases/tag/v2.44.1
security-advisories@github.comhttps://github.com/node-modules/urllib/releases/tag/v4.9.1
security-advisories@github.comhttps://github.com/node-modules/urllib/security/advisories/GHSA-hq3h-g68c-hp78
134c704f-9b21-4f2e-91b3-4a467353bcc0https://github.com/node-modules/urllib/security/advisories/GHSA-hq3h-g68c-hp78
Impacted products
Vendor Product Version
To clipboard 

{
  "affected": [
    {
      "affectedData": [
        {
          "product": "urllib",
          "vendor": "node-modules",
          "versions": [
            {
              "status": "affected",
              "version": "\u003e= 3.0.0, \u003c 4.9.1"
            },
            {
              "status": "affected",
              "version": "\u003c 2.44.1"
            }
          ]
        }
      ],
      "source": "security-advisories@github.com"
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "urllib is an HTTP client for Node.js that supports authentication, redirects, timeouts, and other request features. Prior to 4.9.1 and 2.44.1, urllib follows redirects through followRedirect but reuses caller-supplied options across origins. In src/HttpClient.ts, #requestInternal recursively calls this.#requestInternal(nextUrl.href, options, requestContext), causing options.headers and auth or digestAuth values to be reused when the redirect target has a different scheme, host, or port. Authorization, Cookie, Proxy-Authorization, x-api-key, x-auth-token, and x-access-token can therefore be sent to an attacker-controlled redirected origin, exposing credentials intended for the original origin and potentially allowing reuse against the original partner API or related services. No user interaction is required. This issue is fixed in versions 2.44.1 and 4.9.1."
    }
  ],
  "id": "CVE-2026-55553",
  "lastModified": "2026-08-25T19:16:49.797",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "NETWORK",
          "availabilityImpact": "NONE",
          "baseScore": 7.5,
          "baseSeverity": "HIGH",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "NONE",
          "privilegesRequired": "NONE",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N",
          "version": "3.1"
        },
        "exploitabilityScore": 3.9,
        "impactScore": 3.6,
        "source": "security-advisories@github.com",
        "type": "Secondary"
      }
    ],
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2026-55553",
          "options": [
            {
              "exploitation": "poc"
            },
            {
              "automatable": "yes"
            },
            {
              "technicalImpact": "partial"
            }
          ],
          "role": "CISA Coordinator",
          "timestamp": "2026-08-25T18:25:35.484065Z",
          "version": "2.0.3"
        }
      }
    ]
  },
  "published": "2026-08-25T17:17:32.113",
  "references": [
    {
      "source": "security-advisories@github.com",
      "url": "https://github.com/node-modules/urllib/commit/7c86c465883ebd3dea5109c87d7bbe3b00960a16"
    },
    {
      "source": "security-advisories@github.com",
      "url": "https://github.com/node-modules/urllib/commit/811a8d56e64e540bf6a19bf8b3737692f05d5c46"
    },
    {
      "source": "security-advisories@github.com",
      "url": "https://github.com/node-modules/urllib/pull/812"
    },
    {
      "source": "security-advisories@github.com",
      "url": "https://github.com/node-modules/urllib/pull/813"
    },
    {
      "source": "security-advisories@github.com",
      "url": "https://github.com/node-modules/urllib/releases/tag/v2.44.1"
    },
    {
      "source": "security-advisories@github.com",
      "url": "https://github.com/node-modules/urllib/releases/tag/v4.9.1"
    },
    {
      "source": "security-advisories@github.com",
      "url": "https://github.com/node-modules/urllib/security/advisories/GHSA-hq3h-g68c-hp78"
    },
    {
      "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
      "url": "https://github.com/node-modules/urllib/security/advisories/GHSA-hq3h-g68c-hp78"
    }
  ],
  "sourceIdentifier": "security-advisories@github.com",
  "vulnStatus": "Received",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-200"
        },
        {
          "lang": "en",
          "value": "CWE-201"
        },
        {
          "lang": "en",
          "value": "CWE-522"
        }
      ],
      "source": "security-advisories@github.com",
      "type": "Secondary"
    }
  ]
}



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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

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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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  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
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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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