CVE-2023-43804 (GCVE-0-2023-43804)

Vulnerability from cvelistv5 – Published: 2023-10-04 16:01 – Updated: 2025-11-03 21:49
VLAI
Title
`Cookie` HTTP header isn't stripped on cross-origin redirects
Summary
urllib3 is a user-friendly HTTP client library for Python. urllib3 doesn't treat the `Cookie` HTTP header special or provide any helpers for managing cookies over HTTP, that is the responsibility of the user. However, it is possible for a user to specify a `Cookie` header and unknowingly leak information via HTTP redirects to a different origin if that user doesn't disable redirects explicitly. This issue has been patched in urllib3 version 1.26.17 or 2.0.5.
Severity
5.9 (Medium)
CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:N
CWE
  • CWE-200 - Exposure of Sensitive Information to an Unauthorized Actor
Assigner
References
Impacted products
Vendor Product Version CPE status
urllib3 urllib3 Affected: >= 2.0.0, < 2.0.6
Affected: < 1.26.17
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Advisory\"]},{\"url\":\"https://security.netapp.com/advisory/ntap-20241213-0007/\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\"},{\"url\":\"https://www.vicarius.io/vsociety/posts/cve-2023-43804-urllib3-vulnerability-3\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\"}]}}",
    "redhat_vex": {
      "aggregate_severity": "Moderate",
      "current_release_date": "2026-08-07T13:42:37+00:00",
      "cve": "CVE-2023-43804",
      "id": "CVE-2023-43804",
      "initial_release_date": "2023-10-04T00:00:00+00:00",
      "product_status:fixed": "1878",
      "product_status:known_affected": "36",
      "product_status:known_not_affected": "80",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "python-urllib3: Cookie request header isn\u0027t stripped during cross-origin redirects",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2023/cve-2023-43804.json",
      "version": "3"
    },
    "suse_vex": {
      "aggregate_severity": "moderate",
      "current_release_date": "2026-07-31T01:28:52Z",
      "cve": "CVE-2023-43804",
      "id": "CVE-2023-43804",
      "initial_release_date": "2023-10-06T01:45:14Z",
      "product_status:known_affected": "253",
      "product_status:recommended": "447",
      "source": "SUSE CSAF VEX",
      "status": "interim",
      "title": "SUSE CVE CVE-2023-43804",
      "url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2023-43804.json",
      "version": "67"
    }
  }
}



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Tags
Taxonomy of the tags.





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

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.