Peter Ullrich

#158de 56,337
948.3CVSS total
Vulnerabilidades · 157
Baixa
39
Média
54
Alta
62
Crítica
2
PT-2026-86964
2.3
2026-09-08
Ash · Usage Rules · CVE-2026-82710
## Summary Improper Neutralization of Escape, Meta, or Control Sequences vulnerability in ash-project usage rules allows a malicious package publisher to inject terminal control sequences into the output of `mix usage rules.search docs`. `mix usage rules.search docs` searches Hex documentation through `search.hexdocs.pm`, which indexes the documentation of every published package, and prints the matching results (title, package, type, doc reference, and highlighted snippets) to the terminal. The formatter in `Mix.Tasks.UsageRules.SearchDocs` interpolated those publisher-controlled fields verbatim, neutralizing no terminal control characters; the only transform it applied adds escape sequences rather than removing them. A malicious package can embed ANSI terminal escape sequences (cursor movement, line erase, carriage returns, OSC 52 clipboard writes) in its indexed documentation, so when a developer runs a search that surfaces those docs the sequences reach the terminal unchanged — forging the displayed hexdocs URL or a suggested command, hiding text, or writing to the clipboard. No authentication or privileged position is required; only publishing a package. This issue affects usage rules: from 0.1.18 before 1.2.8. ## Configurations Reachable only when a developer runs `mix usage rules.search docs` in a terminal emulator that interprets ANSI escape sequences and the results include documentation from an attacker-published package (for example a broad `--everywhere` search).