Terminal control injection via package.json version
Published Aug 17, 2026 · Updated Aug 20, 2026
Control-sequence injection in romkatv Powerlevel10k 1.20.0 and earlier lets attackers alter terminal state through a crafted package.json version field. The package prompt segment reads the nearest package.json, accepts control bytes other than newline and backslash in prompt_package, and then expands P9K_PACKAGE_VERSION without visual escaping, so raw ESC sequences are written to the terminal unchanged. Exploitation requires a local user to enter an attacker-controlled directory with the package segment enabled; the demonstrated consequence is terminal control-sequence execution during prompt rendering, bounded by the victim terminal emulator's behavior.
Summary
What happened
Control-sequence injection in romkatv Powerlevel10k 1.20.0 and earlier lets attackers alter terminal state through a crafted package.json version field. The package prompt segment reads the nearest package.json, accepts control bytes other than newline and backslash in prompt_package, and then expands P9K_PACKAGE_VERSION without visual escaping, so raw ESC sequences are written to the terminal unchanged. Exploitation requires a local user to enter an attacker-controlled directory with the package segment enabled; the demonstrated consequence is terminal control-sequence execution during prompt rendering, bounded by the victim terminal emulator's behavior.
The record
- CVE
- CVE-2026-75483
- Published
- Aug 17, 2026
- Updated
- Aug 20, 2026
- Vendor
- romkatv
- Product
- Powerlevel10k
- Classifications
- CWE-150
- Attack vector
- local
- Privileges
- unauthenticated
Timeline
How it unfolded
- Aug 17, 2026CVE publishedPublication date reported by the CVE source.
- Aug 20, 2026Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
Compare your product and version with the public record. A matching version still requires validation against your environment.
Is a vulnerable build present?
Compare these published version ranges with your installed build and any vendor patches.
- Affected versionversion=0 <=1.20.0
What conditions does exploitation require?
What is affected?
Attacks
What attackers are doing with it
Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.
Weakness, pattern, technique
Public exploit references
No public exploit references are available in this record.
Labels summarize the accepted research assessment. They do not indicate a test against your environment.
Technologies
Your stack
See the directory against your own environment.
Your stack
Check the software in your environment
Book a demo to see how Hinoki identifies affected software and validates exploitability in your environment.
Book a demo