Hmbown CodeWhale up to 0.8.63 rlm_eval approval_requirement injection

Summaryinfo

A vulnerability identified as critical has been detected in Hmbown CodeWhale up to 0.8.63. The affected element is the function approval_requirement of the component rlm_eval. This manipulation causes injection. This vulnerability is handled as CVE-2026-75858. The attack can be initiated remotely. There is not any exploit available.

Detailsinfo

A vulnerability classified as critical was found in Hmbown CodeWhale up to 0.8.63. Affected by this vulnerability is the function approval_requirement of the component rlm_eval. The manipulation with an unknown input leads to a injection vulnerability. The CWE definition for the vulnerability is CWE-74. The product constructs all or part of a command, data structure, or record using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify how it is parsed or interpreted when it is sent to a downstream component. As an impact it is known to affect confidentiality, integrity, and availability. The summary by CVE is:

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.

It is possible to read the advisory at github.com. This vulnerability is known as CVE-2026-75858 since 08/18/2026. The exploitation appears to be easy. The attack can be launched remotely. The exploitation doesn't need any form of authentication. It demands that the victim is doing some kind of user interaction. Technical details of the vulnerability are known, but there is no available exploit. The attack technique deployed by this issue is T1055 according to MITRE ATT&CK.

Upgrading to version 0.8.64 eliminates this vulnerability.

Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

Productinfo

Vendor

• Hmbown

Name

• CodeWhale

Version

• 0.8.0
• 0.8.1
• 0.8.2
• 0.8.3
• 0.8.4
• 0.8.5
• 0.8.6
• 0.8.7
• 0.8.8
• 0.8.9
• 0.8.10
• 0.8.11
• 0.8.12
• 0.8.13
• 0.8.14
• 0.8.15
• 0.8.16
• 0.8.17
• 0.8.18
• 0.8.19
• 0.8.20
• 0.8.21
• 0.8.22
• 0.8.23
• 0.8.24
• 0.8.25
• 0.8.26
• 0.8.27
• 0.8.28
• 0.8.29
• 0.8.30
• 0.8.31
• 0.8.32
• 0.8.33
• 0.8.34
• 0.8.35
• 0.8.36
• 0.8.37
• 0.8.38
• 0.8.39
• 0.8.40
• 0.8.41
• 0.8.42
• 0.8.43
• 0.8.44
• 0.8.45
• 0.8.46
• 0.8.47
• 0.8.48
• 0.8.49
• 0.8.50
• 0.8.51
• 0.8.52
• 0.8.53
• 0.8.54
• 0.8.55
• 0.8.56
• 0.8.57
• 0.8.58
• 0.8.59
• 0.8.60
• 0.8.61
• 0.8.62
• 0.8.63

Website

• Product: https://github.com/Hmbown/CodeWhale/

CPE 2.3info

• 🔒
• 🔒
• 🔒

CPE 2.2info

• 🔒
• 🔒
• 🔒

CVSSv4info

CVSSv3info

CVSSv2info

Exploitinginfo

Threat Intelligenceinfo

Countermeasuresinfo

Timelineinfo

Sourcesinfo

Entryinfo

Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

Discussion