Logging user input may result in poisoning logs with ANSI escape sequences

Previous versions of tracing-subscriber were vulnerable to ANSI escape sequence injection attacks. Untrusted user input containing ANSI escape sequences could be injected into terminal output when logged, potentially allowing attackers to: - Manipulate terminal title bars - Clear screens or modify terminal display - Potentially mislead users through terminal manipulation In isolation, impact is minimal, however security issues have been found in terminal emulators that enabled an attacker to use ANSI escape sequences via logs to exploit vulnerabilities in the terminal emulator. This was patched in [PR #3368](https://github.com/tokio-rs/tracing/pull/3368) to escape ANSI control characters from user input.

Source published

29 Aug 2025 12:00:00 UTC

Source modified

12 Oct 2026 18:00:11 UTC

Observed here

24 Oct 2026 13:19:54 UTC

Source terms

OSV · upstream source license applies

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