buttercup

MEDIUM

maintainer Wraient 0 votes scanned 2026-09-17 00:27:14.276658

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
2026-09-17 00:27:14	Medium	2
2026-09-16 00:03:17	Medium	2
2026-09-15 00:25:31	Medium	2
2026-09-14 00:27:57	Medium	2
2026-09-13 00:19:54	Medium	2
2026-09-12 00:25:17	Medium	2
2026-09-11 00:19:22	Medium	2
2026-09-10 00:22:44	Medium	2
2026-09-09 00:04:09	Medium	2
2026-09-08 00:18:08	Medium	2
2026-09-07 00:30:15	Medium	2
2026-09-06 00:17:06	Medium	2
2026-09-05 00:16:27	Medium	2
2026-09-04 00:03:13	Medium	2
2026-09-03 00:15:47	Medium	2
2026-09-02 00:02:31	Medium	2
2026-09-01 00:11:19	Medium	2
2026-08-31 00:19:57	Medium	2
2026-08-30 00:04:14	Medium	2
2026-08-29 00:29:17	Medium	2