diff --git a/gnu/local.mk b/gnu/local.mk
index bc54b61c21..6344144f08 100644
--- a/gnu/local.mk
+++ b/gnu/local.mk
@@ -586,6 +586,7 @@ dist_patch_DATA =						\
   %D%/packages/patches/antlr3-3_3-fix-java8-compilation.patch	\
   %D%/packages/patches/ao-cad-aarch64-support.patch		\
   %D%/packages/patches/apr-skip-getservbyname-test.patch	\
+  %D%/packages/patches/aria2-CVE-2019-3500.patch		\
   %D%/packages/patches/aspell-default-dict-dir.patch		\
   %D%/packages/patches/ath9k-htc-firmware-binutils.patch	\
   %D%/packages/patches/ath9k-htc-firmware-gcc.patch		\
diff --git a/gnu/packages/bittorrent.scm b/gnu/packages/bittorrent.scm
index e834ba3d2a..ee094a4814 100644
--- a/gnu/packages/bittorrent.scm
+++ b/gnu/packages/bittorrent.scm
@@ -264,6 +264,7 @@ (define-public aria2
               (uri (string-append "https://github.com/tatsuhiro-t/aria2/"
                                   "releases/download/release-" version "/"
                                   name "-" version ".tar.xz"))
+              (patches (search-patches "aria2-CVE-2019-3500.patch"))
               (sha256
                (base32
                 "18vpgr430vxlwbcc3598rr1srfmwypls6wp1m4wf21hncc1ahi1s"))))
diff --git a/gnu/packages/patches/aria2-CVE-2019-3500.patch b/gnu/packages/patches/aria2-CVE-2019-3500.patch
new file mode 100644
index 0000000000..891c9047ba
--- /dev/null
+++ b/gnu/packages/patches/aria2-CVE-2019-3500.patch
@@ -0,0 +1,55 @@
+Fix CVE-2019-3500:
+
+https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2019-3500
+https://github.com/aria2/aria2/issues/1329
+
+Patch copied from upstream source repository:
+
+https://github.com/aria2/aria2/commit/37368130ca7de5491a75fd18a20c5c5cc641824a
+
+From 37368130ca7de5491a75fd18a20c5c5cc641824a Mon Sep 17 00:00:00 2001
+From: Tatsuhiro Tsujikawa <tatsuhiro.t@gmail.com>
+Date: Sat, 5 Jan 2019 09:32:40 +0900
+Subject: [PATCH] Mask headers
+
+---
+ src/HttpConnection.cc | 18 ++++++++++++------
+ 1 file changed, 12 insertions(+), 6 deletions(-)
+
+diff --git a/src/HttpConnection.cc b/src/HttpConnection.cc
+index 77cb9d27a..be5b97723 100644
+--- a/src/HttpConnection.cc
++++ b/src/HttpConnection.cc
+@@ -102,11 +102,17 @@ std::string HttpConnection::eraseConfidentialInfo(const std::string& request)
+   std::string result;
+   std::string line;
+   while (getline(istr, line)) {
+-    if (util::startsWith(line, "Authorization: Basic")) {
+-      result += "Authorization: Basic ********\n";
++    if (util::istartsWith(line, "Authorization: ")) {
++      result += "Authorization: <snip>\n";
+     }
+-    else if (util::startsWith(line, "Proxy-Authorization: Basic")) {
+-      result += "Proxy-Authorization: Basic ********\n";
++    else if (util::istartsWith(line, "Proxy-Authorization: ")) {
++      result += "Proxy-Authorization: <snip>\n";
++    }
++    else if (util::istartsWith(line, "Cookie: ")) {
++      result += "Cookie: <snip>\n";
++    }
++    else if (util::istartsWith(line, "Set-Cookie: ")) {
++      result += "Set-Cookie: <snip>\n";
+     }
+     else {
+       result += line;
+@@ -154,8 +160,8 @@ std::unique_ptr<HttpResponse> HttpConnection::receiveResponse()
+   const auto& proc = outstandingHttpRequests_.front()->getHttpHeaderProcessor();
+   if (proc->parse(socketRecvBuffer_->getBuffer(),
+                   socketRecvBuffer_->getBufferLength())) {
+-    A2_LOG_INFO(
+-        fmt(MSG_RECEIVE_RESPONSE, cuid_, proc->getHeaderString().c_str()));
++    A2_LOG_INFO(fmt(MSG_RECEIVE_RESPONSE, cuid_,
++                    eraseConfidentialInfo(proc->getHeaderString()).c_str()));
+     auto result = proc->getResult();
+     if (result->getStatusCode() / 100 == 1) {
+       socketRecvBuffer_->drain(proc->getLastBytesProcessed());