PT-2026-51583 · Rtk Ai · Rtk

Kocaemre + 1 · Published 2026-06-23 · Updated 2026-06-23 · CVE-2026-54555

NVD

CVSS v3.1

7.8

High

Base vector

AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

rtk filters and compresses command outputs before they reach your LLM context. Prior to 0.42.2, the permission splitter did not conservatively split or reject several shell constructs that Bash treats as command execution boundaries or nested execution. As a result, a command beginning with an allowed prefix such as git could hide a second command behind one of these constructs. rtk rewrite returned exit code 0, causing the Claude hook to emit permissionDecision: "allow". The rewritten command still contained the hidden command, so it ran without the user confirmation or denial that the permission rules were intended to enforce. This vulnerability is fixed in 0.42.2.

Fix

Incorrect Authorization

Weakness Enumeration

CWE-863

Related Identifiers

CVE-2026-54555

Affected Products

Rtk

References · 2

• https://nvd.nist.gov/vuln/detail/CVE-2026-54555 · Security Note
• https://github.com/rtk-ai/rtk/security/advisories/GHSA-7gxq-fvfc-g327 · Note