diff --git a/dev-libs/aws-c-auth/Manifest b/dev-libs/aws-c-auth/Manifest
index 5012918af1950..b0cb3af31c7c7 100644
--- a/dev-libs/aws-c-auth/Manifest
+++ b/dev-libs/aws-c-auth/Manifest
@@ -1,2 +1,3 @@
+DIST aws-c-auth-0.10.4.tar.gz 288986 BLAKE2B b69da30caf68ba9e2cdb32c4ae9f12c9dcfc18d707d9ddf357d5fa395bc78164e719ccf5fccee0bc2bfde0baab4d04fbac956c0a36eacdfa54f9a222687bbc91 SHA512 f10209473bc417388a1f6804a10f93fb549f5b960ed4f1522c1080c4d073037f86fd3ab8c6faf8ab0f9d9603602a968f5d1000041299be6690b40cf0e1252357
 DIST aws-c-auth-0.9.2.tar.gz 280216 BLAKE2B a8001c4ad257480e7d5756bb500bb66fb09c5254114510a5a96e13e3150bbf6f0843e59b842d4354ff94f57c5fea3f27b184105e4d1c0d0a3537be0403624469 SHA512 b9abc81d5687de08d5db840ce22d0e41719cfd4c30c0868601da5877444cd66970274d4c8adeee8f409002d118d5a65ada3d2f4292dfd2dcb011922e8adec820
 DIST aws-c-auth-0.9.3.tar.gz 280180 BLAKE2B 68b9750899aea8f4baffaa42afbeaa1b6eb60344d4df386fb328ad01ac16cff4589ef2de7b912ece001f715ed3ecbb8f731d4495f74453a07b74d4d0d23645a5 SHA512 f4573b644717e7882220a97e0795a4a6befba86371a24cb9df2d886dd832f40b478b698e878cb901f23ffde2f97737e27e4d9e5cd1d3af08645f6f1e33f11eee
diff --git a/dev-libs/aws-c-auth/aws-c-auth-0.10.4.ebuild b/dev-libs/aws-c-auth/aws-c-auth-0.10.4.ebuild
new file mode 100644
index 0000000000000..31cac31b90fa4
--- /dev/null
+++ b/dev-libs/aws-c-auth/aws-c-auth-0.10.4.ebuild
@@ -0,0 +1,36 @@
+# Copyright 2025-2026 Gentoo Authors
+# Distributed under the terms of the GNU General Public License v2
+
+EAPI=8
+
+DESCRIPTION="AWS C Auth: C99 library implementation of AWS client-side authentication"
+HOMEPAGE="https://github.com/awslabs/aws-c-auth"
+SRC_URI="https://github.com/awslabs/aws-c-auth/archive/refs/tags/v${PV}.tar.gz -> ${P}.tar.gz"
+
+inherit cmake
+
+LICENSE="Apache-2.0"
+SLOT="0/1"
+KEYWORDS="~amd64"
+IUSE="test"
+
+RESTRICT="!test? ( test )"
+
+DEPEND="
+	dev-libs/aws-c-cal:=
+	>=dev-libs/aws-c-common-0.12.6:=
+	dev-libs/aws-c-http:=
+	dev-libs/aws-c-sdkutils:=
+"
+RDEPEND="${DEPEND}"
+BDEPEND="dev-libs/aws-c-common"
+
+src_configure() {
+	local mycmakeargs=(
+		-DBUILD_TESTING=$(usex test)
+	)
+	use test && mycmakeargs+=(
+		-DENABLE_NET_TESTS=OFF # Network Sandbox cause these to fail.
+	)
+	cmake_src_configure
+}