Nineteen years separate the first cataloged package manager path traversal (CVE-2007-0469) from this year's rediscovery (CVE-2026-34591, CVE-2026-35206). Same bug class. Same archive-extraction primitive. Different ecosystem. A new survey by Nesbitt catalogs a dozen CWE patterns that hit npm, PyPI, RubyGems, Composer, Cargo, Go, Helm, NuGet, and Conda over and over. A few standouts: Argument injection into VCS tools - six separate CVEs in one tool alone across git, hg, and Perforce wrappers (CVE-2021-29472, CVE-2022-36069, CVE-2021-43809, CVE-2023-5752, CVE-2022-24440, plus one more). Integrity checks that fail open: CVE-2016-1252 (clearsigned parser accepted unsigned content), CVE-2022-31156 (sig check silently skipped on error), CVE-2022-46176 (missing SSH host key on git index clones). Dependency confusion was already CVE-2013-0334 - eight years before its 2021 fame. Terminal escape sequences in package metadata: at least nine CVEs across four ecosystems. CocoaPods CVE-2024-38368: an orphaned admin API was left in place for ten years, until a researcher used it to claim 1,800 packages. The thesis: knowledge doesn't transfer between projects. Every ecosystem rediscovers the same dozen bugs from scratch. http://nesbitt.io/2026/05/04/package-manager-cwes.html
Post summary
The post surveys several package‑manager vulnerabilities across ecosystems, highlighting recurring flaw patterns, but offers no PoC, exploit code, patches, or evidence of active exploitation.