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DEBIAN-CVE-2026-44432

Type: advisorySource: OSV1 source record

urllib3 is an HTTP client library for Python. From 2.6.0 to before 2.7.0, urllib3 could decompress the whole response instead of the requested portion (1) during the second HTTPResponse.read(amt=N) call when the response was decompressed using the official Brotli library or (2) when HTTPResponse.drain_conn() was called after the response had been read and decompressed partially (compression algorithm did not matter here). These issues could cause urllib3 to fully decode a small amount of highly compressed data in a single operation. This could result in excessive resource consumption (high CPU usage and massive memory allocation for the decompressed data) on the client side. This vulnerability is fixed in 2.7.0.

Announced Source revision 1
Original source ↗

DEBIAN-CVE-2026-44432

Primary source · Revision 1

Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.

Security context

Source reference: osv:DEBIAN-CVE-2026-44432

python-urllib3

Source reference: /affected/0/package/name

Affected versions
2.3.0-3

Source reference: /affected/0/versions

2.5.0-1

Source reference: /affected/0/versions

2.5.0-1.1

Source reference: /affected/0/versions

2.5.0-2

Source reference: /affected/0/versions

2.6.3-1

Source reference: /affected/0/versions

2.6.3-2

Source reference: /affected/0/versions

Fixed versions
2.7.0-1

Source reference: /affected/0/ranges

Prerequisites
Not stated in this record

Structured affected-version data

Original package identities and version rules from this source.

[
  {
    "ranges": [
      {
        "type": "ECOSYSTEM",
        "events": [
          {
            "introduced": "0"
          },
          {
            "fixed": "2.7.0-1"
          }
        ]
      }
    ],
    "package": {
      "name": "python-urllib3",
      "purl": "pkg:deb/debian/python-urllib3?arch=source&distro=forky",
      "ecosystem": "Debian:14"
    },
    "versions": [
      "2.3.0-3",
      "2.5.0-1",
      "2.5.0-1.1",
      "2.5.0-2",
      "2.6.3-1",
      "2.6.3-2"
    ],
    "database_specific": {
      "source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-44432.json"
    },
    "ecosystem_specific": {
      "urgency": "not yet assigned"
    }
  }
]

Publisher severity

No explicit severity was provided.

Event
#57051 · Revision 1
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Publisher date
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