CVE-2026-75858

CodeWhale rlm_eval before 0.8.64 Remote Code Execution

HIGH
7.8
CVSS Score
Published: August 18, 2026 at 03:21 PM UTC
Updated: October 22, 2026 at 10:10 PM UTC
1 product affected across 1 vendorCodeWhale

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Severity
HIGH7.8
Exploit prediction
EPSS 0.4%
SSVC
PoC

Description

CodeWhale (packages codewhale / codewhale-tui) versions >= 0.8.41 and < 0.8.64 contain a remote code execution vulnerability in the rlm_eval tool. The tool's approval_requirement() returns ApprovalRequirement::Auto, which the engine treats as 'never prompt,' causing arbitrary model-supplied Python code to run in a python3 interpreter without consulting the user's configured --approval-policy and without any approval prompt or audit step. An attacker can induce the agent to execute arbitrary code via prompt injection in untrusted content the agent reads (a web page, fetched URL, repository file, or MCP tool result); the companion rlm_open tool can stage such content. Code runs on the user's machine at the user's privilege level. Fixed in 0.8.64.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

0.8.33 ≤ v < 0.8.410.8.41 ≤ v < 0.8.640.8.330.8.41
Vendor states this is fixed in 0.8.41 (unaffected)
Vendor states this is fixed in 0.8.64 (unaffected)

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

SSVC — Action Prioritization

SSVCPoCNot automatableTotal impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

7.8HIGHVulnCheck
Attack Vector
LOCAL
Complexity
LOW
Privileges
NONE
User Interaction
REQUIRED
Scope
UNCHANGED
Confidentiality
HIGH
Integrity
HIGH
Availability
HIGH
Vector?

Quick Info

StatusDEFERRED
CWE
CWE-94

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