CVE-2026-75857Public exploit

Command execution via auto-approved shell stdin

Published Aug 18, 2026 · Updated Aug 19, 2026

Privilege escalation in Hmbown CodeWhale before 0.8.64 allows attackers to execute commands in approved interactive shells via prompt injection. ShellInteractTool sets exec_shell_interact and exec_interact to ApprovalRequirement::Auto, then passes model-controlled input to write_stdin with no fresh approval, turning live python, ssh, mysql, or sudo sessions into command sinks. Exposure requires shell tools to be enabled and a previously approved long-running interactive process; untrusted page, MCP, or repository content can then execute with that process privilege, including remote-host or root contexts.

CVSS severity7.3
High
EPSS probability0.19%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Privilege escalation in Hmbown CodeWhale before 0.8.64 allows attackers to execute commands in approved interactive shells via prompt injection. ShellInteractTool sets exec_shell_interact and exec_interact to ApprovalRequirement::Auto, then passes model-controlled input to write_stdin with no fresh approval, turning live python, ssh, mysql, or sudo sessions into command sinks. Exposure requires shell tools to be enabled and a previously approved long-running interactive process; untrusted page, MCP, or repository content can then execute with that process privilege, including remote-host or root contexts.

The record

CVE
CVE-2026-75857
Published
Aug 18, 2026
Updated
Aug 19, 2026
Vendor
Shannon Labs
Product
CodeWhale
Classifications
CWE-269, T1059
Attack vector
local
Privileges
unauthenticated

Timeline

How it unfolded

  1. Aug 18, 2026CVE publishedPublication date reported by the CVE source.
  2. Aug 19, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=0.3.10 <0.8.41
  2. Affected versionversion=0.8.41 <0.8.64

What conditions does exploitation require?

Attack vectorlocal
Required privilegesunauthenticated

What is affected?

Shannon Labs · CodeWhaleversion=0.3.10 <0.8.41; version=0.8.41 <0.8.64

Published CVSS scores

7.0VulnCheckCVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H
7.3VulnCheckCVSS:4.0/AV:L/AC:H/AT:P/PR:N/UI:P/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N

CVSS describes severity. EPSS estimates exploitation probability.

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.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-269Improper Privilege Management
T1059Command and Scripting Interpreter

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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