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Suggestion detail

Untriaged
Permalink CVE-2026-49855
7.5 HIGH
  • CVSS version (CVSS): 3.1
  • Attack Vector (AV): Network (N)
  • Attack Complexity (AC): Low (L)
  • Privileges Required (PR): None (N)
  • User Interaction (UI): None (N)
  • Scope (S): Unchanged (U)
  • Confidentiality (C): None (N)
  • Integrity (I): None (N)
  • Availability (A): High (H)
  • Modified Attack Vector (MAV): Network (N)
  • Modified Attack Complexity (MAC): Low (L)
  • Modified Privileges Required (MPR): None (N)
  • Modified User Interaction (MUI): None (N)
  • Modified Confidentiality (MC): None (N)
  • Modified Scope (MS): Unchanged (U)
  • Modified Integrity (MI): None (N)
  • Modified Availability (MA): High (H)
created 1 month, 2 weeks ago Activity log
  • Created suggestion
tornado AsyncHTTPClient accumulates decompressed chunks without size limit (gzip bomb)

Tornado is a Python web framework and asynchronous networking library. Prior to 6.5.6, Tornado gzip decompression routines processed limited-size chunks but did not enforce an overall limit on accumulated decompressed chunks, allowing a malicious server accessed by SimpleAsyncHTTPClient or an HTTPServer configured with decompress_request=True to consume effectively unlimited memory. This issue is fixed in version 6.5.6.

Affected products

tornado
  • ==< 6.5.6

Matching in nixpkgs

pkgs.python313Packages.pytest-tornado

Py.test plugin providing fixtures and markers to simplify testing of asynchronous tornado applications

  • nixos-unstable -
    • nixos-unstable-small 0.8.1
  • nixos-26.05 -
    • nixos-26.05-small 0.8.1

pkgs.python314Packages.pytest-tornado

Py.test plugin providing fixtures and markers to simplify testing of asynchronous tornado applications

  • nixos-unstable -
    • nixos-unstable-small 0.8.1
  • nixos-26.05 -
    • nixos-26.05-small 0.8.1