buttercup

MEDIUM

maintainer Wraient 0 votes scanned 2026-11-01 00:21:48.120785

View on AUR

Why flagged

This PKGBUILD has two real but non-malicious concerns: (1) It downloads a precompiled binary from GitHub releases with sha256sums='SKIP', meaning no integrity verification of the binary being installed to /usr/bin. The binary is from a small personal project (Wraient/buttercup) with no checksum pinning. (2) The build() step runs 'npm install -g webtorrent-cli' which installs an npm package globally into the system (outside $pkgdir), bypassing pacman's package management entirely. webtorrent-cli is a legitimate well-known package, but installing it globally via npm in build() is non-standard and leaves untracked files on the system. Neither pattern constitutes active malware/RCE/exfiltration, but the combination of an unverified binary + a global npm install that escapes pacman's control is a genuine medium-severity packaging concern. The pkgver() function also fetches from the GitHub API at build time, which is unusual but not malicious.

Triggered rules

Medium npm/yarn/pnpm install of an undeclared external package npm_install_external

Runs `npm/yarn/pnpm install <package>` for a package not in source=(), pulling unpinned, unreviewed code at build time. Severity downgraded: the package declares/looks like a Node.js consumer, where build-time installs are expected.

PKGBUILD:22 npm install -g webtorrent-cli

Medium AI review llm_review

An AI model (anthropic/claude-4.6-sonnet-20260217) reviewed this and agrees it is MEDIUM (confidence 82%): This PKGBUILD has two real but non-malicious concerns: (1) It downloads a precompiled binary from GitHub releases with sha256sums='SKIP', meaning no integrity verification of the binary being installed to /usr/bin. The binary is from a small personal project (Wraient/buttercup) with no checksum pinning. (2) The build() step runs 'npm install -g webtorrent-cli' which installs an npm package globally into the system (outside $pkgdir), bypassing pacman's package management entirely. webtorrent-cli is a legitimate well-known package, but installing it globally via npm in build() is non-standard and leaves untracked files on the system. Neither pattern constitutes active malware/RCE/exfiltration, but the combination of an unverified binary + a global npm install that escapes pacman's control is a genuine medium-severity packaging concern. The pkgver() function also fetches from the GitHub API at build time, which is unusual but not malicious.

PKGBUILD

1 offending line(s) highlighted

      1# Maintainer: Wraient <rushikeshwastaken@gmail.com>
    
      2pkgname='buttercup'
    
      3pkgver=1.1.0
    
      4pkgrel=2
    
      5pkgdesc="Watch TV Shows / Movies from torrent."
    
      6arch=("x86_64")
    
      7url="https://github.com/Wraient/buttercup"
    
      8license=('GPL')
    
      9depends=('mpv' 'rofi' 'npm')
    
      10source=("buttercup::https://github.com/Wraient/buttercup/releases/latest/download/buttercup")
    
      11sha256sums=('SKIP')
    
      12
    
      13pkgver() {
    
      14    # Fetch the latest release tag from GitHub and set it as pkgver
    
      15    local latest_release
    
      16    latest_release=$(curl -s https://api.github.com/repos/Wraient/buttercup/releases/latest | grep -Po '"tag_name": "\K.*?(?=")')
    
      17    echo "${latest_release#v}"
    
      18}
    
      19
    
      20build() {
    
      21    # Install webtorrent-cli globally via npm
    
      22    npm install -g webtorrent-cli
    
      23}
    
      24
    
      25package() {
    
      26    # Install the precompiled binary into /usr/bin
    
      27    install -Dm755 "$srcdir/buttercup" "$pkgdir/usr/bin/buttercup"
    
      28}
    
      29

Scan history

Scanned at (UTC)	Severity	Rules
2026-11-01 00:21:48	Medium	2
2026-10-31 00:07:41	Medium	2
2026-10-30 00:29:30	Medium	2
2026-10-29 00:13:55	Medium	2
2026-10-28 00:06:54	Medium	2
2026-10-27 00:23:28	Medium	2
2026-10-26 00:12:40	Medium	2
2026-10-25 00:20:48	Medium	2
2026-10-24 00:14:55	Medium	2
2026-10-23 00:02:19	Medium	2
2026-10-22 00:13:10	Medium	2
2026-10-21 00:12:50	Medium	2
2026-10-20 00:10:31	Medium	2
2026-10-19 00:03:55	Medium	2
2026-10-18 00:06:55	Medium	2
2026-10-17 00:21:55	Medium	2
2026-10-16 00:12:47	Medium	2
2026-10-15 00:28:05	Medium	2
2026-10-14 00:06:47	Medium	2
2026-10-13 00:23:45	Medium	2