The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available.

  - urllib3 is an HTTP client library for Python. urllib3's streaming API is designed for the efficient     handling of large HTTP responses by reading the content in chunks, rather than loading the entire response     body into memory at once. urllib3 can perform decoding or decompression based on the HTTP `Content-     Encoding` header (e.g., `gzip`, `deflate`, `br`, or `zstd`). When using the streaming API, the library     decompresses only the necessary bytes, enabling partial content consumption. Starting in version 1.22 and     prior to version 2.6.3, for HTTP redirect responses, the library would read the entire response body to     drain the connection and decompress the content unnecessarily. This decompression occurred even before any     read methods were called, and configured read limits did not restrict the amount of decompressed data. As     a result, there was no safeguard against decompression bombs. A malicious server could exploit this to     trigger excessive resource consumption on the client. Applications and libraries are affected when they     stream content from untrusted sources by setting `preload_content=False` when they do not disable     redirects. Users should upgrade to at least urllib3 v2.6.3, in which the library does not decode content     of redirect responses when `preload_content=False`. If upgrading is not immediately possible, disable     redirects by setting `redirect=False` for requests to untrusted source. (CVE-2026-21441)

Note that Nessus relies on the presence of the package as reported by the vendor.

Detections

Analytics

Linux Distros Unpatched Vulnerability : CVE-2026-21441

high Nessus Plugin ID 282456

Version 1.9

Version 1.8

Version 1.7

Version 1.6

Version 1.5

Version 1.4

Version 1.3

Version 1.2

Version 1.1

Version 1.9 Jan 21, 2026, 10:50 AM Detection (updated detection logic) Plugin metadata Plugin Feed: 202601211050
Version 1.8 Jan 19, 2026, 7:50 PM Detection (updated detection logic) Plugin metadata Plugin Feed: 202601191950
Version 1.7 Jan 18, 2026, 1:30 AM CVSS metrics ("CVSSv3 score" set to 7.5) CVSS metrics ("CVSSv3 vector" set to "CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H") CVSSv3 severity (based on None, severity increased from "Medium" to "High") Detection (updated detection logic) Plugin metadata Plugin Feed: 202601180130
Version 1.6 Jan 15, 2026, 2:04 PM Detection (updated detection logic) Plugin Feed: 202601151404
Version 1.5 Jan 14, 2026, 5:08 AM Detection (updated detection logic) Plugin metadata Plugin Feed: 202601140508
Version 1.4 Jan 13, 2026, 2:35 AM CVSS metrics ("CVSSv3 score" set to 5.8) CVSS metrics ("CVSSv3 vector" set to "CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:N/A:N") Detection (updated detection logic) Plugin metadata Plugin Feed: 202601130235
Version 1.3 Jan 10, 2026, 7:58 PM Detection (updated detection logic) Plugin metadata Plugin Feed: 202601101958
Version 1.2 Jan 8, 2026, 11:25 PM CVSS metrics ("CVSSv2 score" set to 5.0) CVSS metrics ("CVSSv2 vector" set to "CVSS2#AV:N/AC:L/Au:N/C:P/I:N/A:N") CVSS metrics ("CVSSv3 score" set to 4.7) CVSS metrics ("CVSSv3 vector" set to "CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:N/A:N") Detection (updated detection logic) Plugin metadata Plugin Feed: 202601082325
Version 1.1 Jan 8, 2026, 1:54 PM New Plugin Feed: 202601081354