Sec: Update hackney to version 4.9.1

Hackney 4.9 enforces max_body while it reads and returns
{:error, {:closed, partial}} for a truncated body; the hackney
regression tests now pin that. The certifi override goes, as
hackney itself now asks for certifi ~> 2.18.0.

changelog.d/hackney-4.9.1.security

@@ -0,0 +1 @@
+Update Hackney to version 4.9.1, which fixes unbounded response body buffering and decompression, CA pinning, redirect credential leaks and other vulnerabilities

mix.exs

@@ -224,9 +224,7 @@ defmodule Pleroma.Mixfile do
       {:mix_audit, "~> 2.1", only: [:dev, :test], runtime: false},
       {:mock, "~> 0.3.9", only: :test},
       {:covertool, "~> 2.0", only: :test},
-      {:hackney, "~> 4.7.3", override: true},
+      {:hackney, "~> 4.9.1", override: true},
-      # Hackney 4.7.3 pins certifi ~> 2.17.0; 2.18.0 drops the distrusted emSign roots.
-      {:certifi, "~> 2.18.0", override: true},
       {:mox, "~> 1.2", only: :test},
       {:websockex, "~> 0.4.3", only: :test},
       {:benchee, "~> 1.4", only: :benchmark},

mix.lock

@@ -58,8 +58,8 @@
   "gen_smtp": {:hex, :gen_smtp, "0.15.0", "9f51960c17769b26833b50df0b96123605a8024738b62db747fece14eb2fbfcc", [:rebar3], [], "hexpm", "29bd14a88030980849c7ed2447b8db6d6c9278a28b11a44cafe41b791205440f"},
   "gettext": {:hex, :gettext, "0.24.0", "6f4d90ac5f3111673cbefc4ebee96fe5f37a114861ab8c7b7d5b30a1108ce6d8", [:mix], [{:expo, "~> 0.5.1", [hex: :expo, repo: "hexpm", optional: false]}], "hexpm", "bdf75cdfcbe9e4622dd18e034b227d77dd17f0f133853a1c73b97b3d6c770e8b"},
   "gun": {:hex, :gun, "2.7.0", "8dfc20ff1b70f3c78f07122f7d82ac6950c40d33a8a9b35da0134f49fb35b334", [:make, :rebar3], [{:cowlib, ">= 2.21.0 and < 3.0.0", [hex: :cowlib, repo: "hexpm", optional: false]}], "hexpm", "2a90d073069e72654b6c9a91fae365b746ff5ce385a4a5bbf71ef53a8bf95d82"},
-  "h2": {:hex, :h2, "0.11.0", "b8c9f7c86f400582c5cbed59f79c0efd6cf49ad6478c210bede91d2d15019b14", [:rebar3], [], "hexpm", "c61f24361d0dc76375eaf35c2bf0e01235d81b7685538df571db036467fac358"},
+  "h2": {:hex, :h2, "0.12.5", "03d492b4cce77466c4c4a2b3fd74b2bb16c1d78f9618bbfeb50ea493c005accf", [:rebar3], [], "hexpm", "a4524bf80cafb86e599710c1d5c9f63aca0284607cb4d99fb53ae63fd55aa03f"},
-  "hackney": {:hex, :hackney, "4.7.3", "42feec1a4986000411cb5d389bbc9fb61d9dff84c5eef42b11fc40ea327e6f9a", [:rebar3], [{:certifi, "~> 2.17.0", [hex: :certifi, repo: "hexpm", optional: false]}, {:h2, "~> 0.11.0", [hex: :h2, repo: "hexpm", optional: false]}, {:idna, "~> 7.1.0", [hex: :idna, repo: "hexpm", optional: false]}, {:mimerl, "~> 1.5", [hex: :mimerl, repo: "hexpm", optional: false]}, {:parse_trans, "3.4.2", [hex: :parse_trans, repo: "hexpm", optional: false]}, {:ssl_verify_fun, "~> 1.1.0", [hex: :ssl_verify_fun, repo: "hexpm", optional: false]}, {:webtransport, "~> 0.4.4", [hex: :webtransport, repo: "hexpm", optional: false]}], "hexpm", "3f460e01d5a1abba39c32d06e9a733bb76e35d1ab87a83868b6bb29d646fe25f"},
+  "hackney": {:hex, :hackney, "4.9.1", "1c1c3d75ae0f9c35df40f56ca63ba2f8c9986d988d67ae8ebe26f96697e81485", [:rebar3], [{:certifi, "~> 2.18.0", [hex: :certifi, repo: "hexpm", optional: false]}, {:h2, "~> 0.12.5", [hex: :h2, repo: "hexpm", optional: false]}, {:idna, "~> 7.1.0", [hex: :idna, repo: "hexpm", optional: false]}, {:mimerl, "~> 1.5", [hex: :mimerl, repo: "hexpm", optional: false]}, {:parse_trans, "3.4.2", [hex: :parse_trans, repo: "hexpm", optional: false]}, {:quic, "~> 2.1.2", [hex: :quic, repo: "hexpm", optional: false]}, {:ssl_verify_fun, "~> 1.1.0", [hex: :ssl_verify_fun, repo: "hexpm", optional: false]}, {:webtransport, "~> 0.4.8", [hex: :webtransport, repo: "hexpm", optional: false]}], "hexpm", "093e1830e523c2b1972d570dcee83d000d41f7b39e7eb3c6b5240cf0f64a1973"},
   "hpax": {:hex, :hpax, "1.1.0", "782931867cc23217c68fb5f68fe1a11f5e7544c7fda82c8a7019a5df5a4a1cdf", [:mix], [], "hexpm", "0b8d0f05832f55571d65ac720f79bf8994138ffbb133209dc4685eae0ad456a8"},
   "html_entities": {:hex, :html_entities, "0.5.2", "9e47e70598da7de2a9ff6af8758399251db6dbb7eebe2b013f2bbd2515895c3c", [:mix], [], "hexpm", "c53ba390403485615623b9531e97696f076ed415e8d8058b1dbaa28181f4fdcc"},
   "http_signatures": {:hex, :http_signatures, "0.1.3", "19f26aee35b4684e37efdce3ac4638605e6e41a04368186bd39d2b6138a60ea9", [:mix], [{:plug, "~> 1.18", [hex: :plug, repo: "hexpm", optional: false]}], "hexpm", "20313a65516db88006f85b090f6f76cc5b04e9609b45943657e6781eb91174f4"},
@@ -130,7 +130,7 @@
   "prometheus_phx": {:git, "https://git.pleroma.social/pleroma/elixir-libraries/prometheus-phx.git", "9cd8f248c9381ffedc799905050abce194a97514", [branch: "no-logging"]},
   "prometheus_plugs": {:hex, :prometheus_plugs, "1.1.5", "25933d48f8af3a5941dd7b621c889749894d8a1082a6ff7c67cc99dec26377c5", [:mix], [{:accept, "~> 0.1", [hex: :accept, repo: "hexpm", optional: false]}, {:plug, "~> 1.0", [hex: :plug, repo: "hexpm", optional: false]}, {:prometheus_ex, "~> 1.1 or ~> 2.0 or ~> 3.0", [hex: :prometheus_ex, repo: "hexpm", optional: false]}, {:prometheus_process_collector, "~> 1.1", [hex: :prometheus_process_collector, repo: "hexpm", optional: true]}], "hexpm", "0273a6483ccb936d79ca19b0ab629aef0dba958697c94782bb728b920dfc6a79"},
   "quantile_estimator": {:hex, :quantile_estimator, "0.2.1", "ef50a361f11b5f26b5f16d0696e46a9e4661756492c981f7b2229ef42ff1cd15", [:rebar3], [], "hexpm", "282a8a323ca2a845c9e6f787d166348f776c1d4a41ede63046d72d422e3da946"},
-  "quic": {:hex, :quic, "1.8.0", "7b074fc6f8a13b4a81e4e11254bf061db61c5c07b4366d568a79a38c5e8bb5f3", [:rebar3], [], "hexpm", "6b1f8f08a45412ac503bc6771efb8edc696bb14079bc48d2ca960b92933da8a4"},
+  "quic": {:hex, :quic, "2.1.3", "c66861354d39b0f2b8ac0d7cde56d90db0168ac7b3ffa11d1cb8ab37237d1233", [:rebar3], [], "hexpm", "1520df50fc63093c0a4d209cb97056e132d06f0b8fd54c5cf933ddc0c0ea6fe2"},
   "ranch": {:hex, :ranch, "2.2.1", "fc2bb0e800efbeab8ff82eb325450b9c08653b14c3f69e8b09bbea304973105d", [:make, :rebar3], [], "hexpm", "55f05cce20ec2da1d90de5d5981afb93dbfc01325fc7e933189aa5c62f037c24"},
   "recon": {:hex, :recon, "2.5.6", "9052588e83bfedfd9b72e1034532aee2a5369d9d9343b61aeb7fbce761010741", [:mix, :rebar3], [], "hexpm", "96c6799792d735cc0f0fd0f86267e9d351e63339cbe03df9d162010cefc26bb0"},
   "remote_ip": {:hex, :remote_ip, "1.2.0", "fb078e12a44414f4cef5a75963c33008fe169b806572ccd17257c208a7bc760f", [:mix], [{:combine, "~> 0.10", [hex: :combine, repo: "hexpm", optional: false]}, {:plug, "~> 1.14", [hex: :plug, repo: "hexpm", optional: false]}], "hexpm", "2ff91de19c48149ce19ed230a81d377186e4412552a597d6a5137373e5877cb7"},
@@ -158,7 +158,7 @@
   "websock": {:hex, :websock, "0.5.3", "2f69a6ebe810328555b6fe5c831a851f485e303a7c8ce6c5f675abeb20ebdadc", [:mix], [], "hexpm", "6105453d7fac22c712ad66fab1d45abdf049868f253cf719b625151460b8b453"},
   "websock_adapter": {:hex, :websock_adapter, "0.5.9", "43dc3ba6d89ef5dec5b1d0a39698436a1e856d000d84bf31a3149862b01a287f", [:mix], [{:bandit, ">= 0.6.0", [hex: :bandit, repo: "hexpm", optional: true]}, {:plug, "~> 1.14", [hex: :plug, repo: "hexpm", optional: false]}, {:plug_cowboy, "~> 2.6", [hex: :plug_cowboy, repo: "hexpm", optional: true]}, {:websock, "~> 0.5", [hex: :websock, repo: "hexpm", optional: false]}], "hexpm", "5534d5c9adad3c18a0f58a9371220d75a803bf0b9a3d87e6fe072faaeed76a08"},
   "websockex": {:hex, :websockex, "0.4.3", "92b7905769c79c6480c02daacaca2ddd49de936d912976a4d3c923723b647bf0", [:mix], [], "hexpm", "95f2e7072b85a3a4cc385602d42115b73ce0b74a9121d0d6dbbf557645ac53e4"},
-  "webtransport": {:hex, :webtransport, "0.4.4", "714180b340fbd30a7d666f3f593a612186ff1ba444566b3e8c9ce37fb2950638", [:rebar3], [{:h2, "~> 0.11.0", [hex: :h2, repo: "hexpm", optional: false]}, {:quic, "~> 1.8.0", [hex: :quic, repo: "hexpm", optional: false]}], "hexpm", "80a6641e0f6628938ceee4c9d7a4f6d48a6089890da1ae3288ca8dab13a6005e"},
+  "webtransport": {:hex, :webtransport, "0.4.8", "3c340d7ea381e3f639ece90378d85fb46b1da4eece17bba3223051e833166501", [:rebar3], [{:h2, "~> 0.12", [hex: :h2, repo: "hexpm", optional: false]}, {:quic, "~> 2.0", [hex: :quic, repo: "hexpm", optional: false]}], "hexpm", "08477a2195ccbf944da0b78f85dc4e6ee4498790e3dd7fe84ee7a245938e1b26"},
   "yamerl": {:hex, :yamerl, "0.10.0", "4ff81fee2f1f6a46f1700c0d880b24d193ddb74bd14ef42cb0bcf46e81ef2f8e", [:rebar3], [], "hexpm", "346adb2963f1051dc837a2364e4acf6eb7d80097c0f53cbdc3046ec8ec4b4e6e"},
   "yaml_elixir": {:hex, :yaml_elixir, "2.12.2", "9dd1330fb4cd9a36a7b0f502e5b12486eff632792ee4a5f0eba52a4d4ec32c9c", [:mix], [{:yamerl, "~> 0.10", [hex: :yamerl, repo: "hexpm", optional: false]}], "hexpm", "e7c1b10122f973e6558462d51c39026ba0e14afbc6745318e990ea82cfe9e159"},
 }

test/pleroma/http/hackney_conn_leak_test.exs

@@ -14,7 +14,8 @@
 #
 # Pleroma cannot work around this: since 4.0 Hackney ignores `with_body` and
 # always returns a fully read binary, so a synchronous request never yields a
-# handle to close, and a truncated read still reports `{:ok, body}`.
+# handle to close. Up to 4.8 a truncated read also reported `{:ok, body}`;
+# since 4.9 it is `{:error, {:closed, partial_body}}`.
 #
 # Media proxy warming hits this whenever an attachment fetch is cut short and
 # the outbound proxy is used as a CONNECT tunnel, since tunnels are never
@@ -50,11 +51,9 @@ defmodule Pleroma.HTTP.HackneyConnLeakTest do
     # pool: false takes hackney's connect_direct/4 path, the same unpooled shape
     # a CONNECT tunnel gets. A pooled connection is reaped by the pool's own
     # grace timer and would not show the leak.
-    assert {:ok, %Tesla.Env{status: 200, body: body}} =
+    assert {:error, {:closed, body}} = request(server, pool: false)
-             request(server, pool: false)
 
-    # The short read still reports success, which is why nothing downstream
+    # The short read hands back what did arrive.
-    # knows to clean up.
     assert byte_size(body) == @sent_bytes
 
     leaked = wait_for_cleanup(before)
@@ -70,7 +69,7 @@ defmodule Pleroma.HTTP.HackneyConnLeakTest do
   test "a pooled request with a truncated body does not leak either", %{server: server} do
     before = conn_pids()
 
-    assert {:ok, %Tesla.Env{status: 200}} = request(server, pool: :media)
+    assert {:error, {:closed, _}} = request(server, pool: :media)
 
     assert wait_for_cleanup(before) == []
   end

test/pleroma/http/hackney_max_body_regression_test.exs

@@ -4,8 +4,9 @@
 
 # Hackney 4 ignores `with_body` and always returns a fully read binary, so
 # `Tesla.Adapter.Hackney` never reaches the clause that honours `:max_body`.
-# The limit is enforced by Pleroma.Tesla.Middleware.MaxBody instead; these
+# Hackney 4.9 enforces `max_body` itself while reading (CVE-2026-97200);
-# exercise it against the real adapter.
+# Pleroma.Tesla.Middleware.MaxBody stays as the check for every adapter. These
+# exercise both against the real adapter.
 defmodule Pleroma.HTTP.HackneyMaxBodyRegressionTest do
   use ExUnit.Case, async: false
 
@@ -62,12 +63,11 @@ defmodule Pleroma.HTTP.HackneyMaxBodyRegressionTest do
     assert byte_size(body) == @body_bytes
   end
 
-  # Pins why the middleware is needed. Tesla.Adapter.Hackney only honours
+  # Hackney 4.0 to 4.8 read the whole body whatever `max_body` said; 4.9
-  # :max_body on the branch where hackney hands back a ref, which 4.x never
+  # stops reading once the body goes over it (CVE-2026-97200). Should this
-  # does for a synchronous request. Should this ever start failing, hackney or
+  # start failing, the hackney pin has gone back to a version without the fix.
-  # Tesla have regained streaming and the middleware can go.
+  test "the bare adapter enforces max_body", %{server: server} do
-  test "the bare adapter does not enforce max_body", %{server: server} do
+    url = "#{server.base_url}/chunked"
-    url = "#{server.base_url}/big"
 
     adapter_opts =
       HackneyAdapterHelper.options(
@@ -77,10 +77,8 @@ defmodule Pleroma.HTTP.HackneyMaxBodyRegressionTest do
 
     client = Tesla.client([], Tesla.Adapter.Hackney)
 
-    assert {:ok, %Tesla.Env{status: 200, body: body}} =
+    assert {:error, :body_too_large} =
              Tesla.request(client, method: :get, url: url, opts: [adapter: adapter_opts])
-
-    assert byte_size(body) == @body_bytes
   end
 
   defp start_server do