diff --git a/app-arch/7zip/7zip-26.03.ebuild b/app-arch/7zip/7zip-26.03.ebuild
new file mode 100644
index 0000000000000..b968faff9530e
--- /dev/null
+++ b/app-arch/7zip/7zip-26.03.ebuild
@@ -0,0 +1,119 @@
+# Copyright 2023-2026 Gentoo Authors
+# Distributed under the terms of the GNU General Public License v2
+
+EAPI=8
+
+inherit edos2unix flag-o-matic toolchain-funcs
+
+NO_DOT_PV=$(ver_rs 1- '')
+DESCRIPTION="Free file archiver for extremely high compression"
+HOMEPAGE="https://www.7-zip.org/ https://sourceforge.net/projects/sevenzip/"
+# linux-x64 tarball is only used for docs
+SRC_URI="
+	https://github.com/ip7z/7zip/releases/download/${PV}/7z${NO_DOT_PV}-src.tar.xz
+	https://github.com/ip7z/7zip/releases/download/${PV}/7z${NO_DOT_PV}-linux-x64.tar.xz
+"
+S=${WORKDIR}
+
+LICENSE="LGPL-2 BSD rar? ( unRAR )"
+SLOT="0"
+KEYWORDS="~alpha ~amd64 ~arm ~arm64 ~hppa ~loong ~ppc ~ppc64 ~riscv ~s390 ~sparc ~x86"
+IUSE="uasm jwasm rar +symlink"
+REQUIRED_USE="?? ( uasm jwasm )"
+
+DOCS=( readme.txt History.txt License.txt )
+HTML_DOCS=( MANUAL )
+
+BDEPEND="
+	app-arch/xz-utils[extra-filters(+)]
+	uasm? ( dev-lang/uasm )
+	jwasm? ( dev-lang/jwasm )
+"
+RDEPEND="
+	symlink? ( !app-arch/p7zip )
+"
+
+PATCHES=(
+	"${FILESDIR}/${PN}-24.05-respect-build-env.patch"
+)
+
+pkg_setup() {
+	# instructions in DOC/readme.txt, Compiling 7-Zip for Unix/Linux
+	# TLDR; every combination of options (clang|gcc)+(asm/noasm)
+	# has a dedicated makefile & builddir
+	mfile="cmpl"
+	if tc-is-clang; then
+		mfile="${mfile}_clang"
+		bdir=c
+	elif tc-is-gcc; then
+		mfile="${mfile}_gcc"
+		bdir=g
+	else
+		die "Unsupported compiler: $(tc-getCC)"
+	fi
+	if use jwasm || use uasm ; then
+		mfile="${mfile}_x64"
+		bdir="${bdir}_x64"
+	fi
+	export mfile="${mfile}.mak"
+	export bdir
+}
+
+src_prepare() {
+	# patch doesn't deal with CRLF even if file+patch match
+	# not even with --ignore-whitespace, --binary or --force. We only
+	# strictly need to convert the .mk files we patch but do everything
+	# to allow easily patching in future + facilitate user patches.
+	pushd "./CPP/7zip" || die "Unable to switch directory"
+	edos2unix $(find . -type 'f' || die)
+	sed -i -e 's/-Werror //g' ./7zip_gcc.mak || die "Error removing -Werror"
+	popd >/dev/null || die "Unable to switch directory"
+
+	default
+}
+
+src_compile() {
+	# avoid executable stack when using uasm/jwasm, harmless otherwise
+	append-ldflags -Wl,-z,noexecstack
+	export G_CFLAGS=${CFLAGS}
+	export G_CXXFLAGS=${CXXFLAGS}
+	export G_LDFLAGS=${LDFLAGS}
+
+	local args=(
+		-f "../../${mfile}"
+		CC=$(tc-getCC)
+		CXX=$(tc-getCXX)
+	)
+	# NOTE: makefile doesn't check the value of DISABLE_RAR_COMPRESS, only
+	# whether it's defined or not. so in case user has `rar` enabled
+	# DISABLE_RAR_COMPRESS (and DISABLE_RAR) needs to stay undefined.
+	if ! use rar; then
+		# disables non-free rar code but allows listing and extracting
+		# non-compressed rar archives
+		args+=( DISABLE_RAR_COMPRESS=1 )
+	fi
+	if use jwasm; then
+		args+=( USE_JWASM=1 )
+	elif use uasm; then
+		args+=( MY_ASM=uasm )
+	fi
+
+	# Build executable and library
+	for i in "./CPP/7zip/Bundles/Alone2" "./CPP/7zip/Bundles/Format7zF" ; do
+		pushd "${i}" || die "Unable to switch directory"
+		mkdir -p "${bdir}" || die  # Bug: https://bugs.gentoo.org/933619
+		emake ${args[@]}
+		popd > /dev/null || die "Unable to switch directory"
+	done
+}
+
+src_install() {
+	dobin "./CPP/7zip/Bundles/Alone2/b/${bdir}/7zz"
+	dolib.so "./CPP/7zip/Bundles/Format7zF/b/${bdir}/7z.so"
+	if use symlink; then
+		dosym 7zz /usr/bin/7z
+		dosym 7zz /usr/bin/7za
+		dosym 7zz /usr/bin/7zr
+	fi
+	einstalldocs
+}
diff --git a/app-arch/7zip/Manifest b/app-arch/7zip/Manifest
index 49b552aa3dfa4..267f70cf2edcd 100644
--- a/app-arch/7zip/Manifest
+++ b/app-arch/7zip/Manifest
@@ -1,2 +1,4 @@
 DIST 7z2602-linux-x64.tar.xz 1571416 BLAKE2B 2f83d967b3a16d4aaf3a96ba7c242ff7fe3d9628a7a556f797ec509fe12a1e08b9b453f571fa2911a941244fb6482b99b294770736debfaeaa1b966003973e57 SHA512 1f8d3c90287f006501ed06da6e22687267e95b39a92267220ed5d2f218e950e5cecbb410aefef3c92a067857943f417767f410b07d74c0caa2b86f37b05d2a1e
 DIST 7z2602-src.tar.xz 1543480 BLAKE2B 26fb72ffef65c316ff97959981e4f8eb4dbbd5ac09900d3c6ab880347ff23cc781f4b4196f138e8c558afa5c1fd738feebc73299f6be70d9787dfc9ffa9afc69 SHA512 85449360904b295cb47a86597cca5e6623f4119e4e5ad3491d67bea8cd416bad68c4bfb69b9ec521ccee6e431a080d9e8aa8f5eecb69d8305c66973048e56a16
+DIST 7z2603-linux-x64.tar.xz 1575072 BLAKE2B d32fb9c8ae99acad2571d5a8f7be66bdcfa6804fbc1f70ab79be5551591b3ad49f34c216d69f6f7fe046725609bbc29248b27e233dcafb57cdc2c1e93006f4a7 SHA512 d02bf68d9b458480cee9916c199a80e8d4b520ad69fe7052ecf1a16e4dd4d0e7c1bd96b15c65b1b91d31565fb26d6c20e1bf2af7765d571ace8e59834f2dd612
+DIST 7z2603-src.tar.xz 1552200 BLAKE2B d50364d6a3668ee4bc1528602eb779aafd6169e9a8a7fd2daaf1ebf10a963e8a9fa2a74b36219c34287b7ecae2bdab52abcfdb8840340181791994b087f44479 SHA512 469ebb37fb1495982ffee453cc6298dabb14b449e42fbe231001d0dae51ee3bcc83fdf46fec137a7cf7d6688a696b689a90d1aff3408d716e458b2ce064458c7