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CVE-2026-75858· NVD / CVE Program· CNA VulnCheck

CodeWhale rlm_eval before 0.8.64 Remote Code Execution

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.

HighCVSS 8.5 · v4.0—No exploit Fix available

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Published
Aug 18, 2026
Updated
Sep 8, 2026
EPSS
0.4% · 28th percentile
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Report tools

JSON

Action score

34

Monitor

Low priority for now.

CVSS
34 / 40 · 8.5 / 10
CISA KEV
0 / 30 · Not listed
EPSS
0 / 30 · 0.4%

CISA SSVC decision

Exploitation
proof of concept
Automatable
no
Technical impact
total

Vulnrichment: CISA's decision-tree inputs.

CNA vs NVD score

NVD
—
CNA · VulnCheck
8.5
NVD has not scored this yet; the score shown is the CNA’s.

CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N

The score given by the assigning authority versus NVD’s independent score. A gap means the severity is contested.

Affected systems

—

Versions reported by the vendor

Affected version ranges reported by the assigning authority (VulnCheck). Independent of NVD's CPE analysis and usually ahead of it.

  • Hmbown CodeWhale

    • 0.8.41, 0.8.41, 0.8.64, 0.8.64not affected
    • 0.8.33 and later · before 0.8.41affected · semver
    • 0.8.33 and later · before 0.8.41affected · semver
    • 0.8.41 and later · before 0.8.64affected · semver
    • 0.8.41 and later · before 0.8.64affected · semver

Package-level exposure

OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.

EcosystemPackageAffected rangeFix
crates.iocodewhale-tuifrom 0.8.41 · before 0.8.640.8.64
crates.iodeepseek-tuifrom 0.8.33 · up to and including 0.8.41—
npmcodewhalefrom 0.8.41 · before 0.8.640.8.64
npmcodewhalefrom 0.8.41 · before 0.8.640.8.64
npmdeepseek-tuifrom 0.8.33 · before 0.8.410.8.41
npmdeepseek-tuifrom 0.8.33 · before 0.8.410.8.41

Same product

hmbown: all records

Other highest-scoring records for the same primary product.

  • CVE-2026-45374CodeWhale: task_create Insecure Defaults Enable RCE via Prompt Injection in Project Files
    38Monitor
  • CVE-2026-45311CodeWhale: run_tests Tool Enables RCE via Malicious Repository Without Approval
    38Monitor
  • CVE-2026-75856CodeWhale before 0.8.64 SSRF Bypass via DNS Pinning TOCTOU
    36Monitor
  • CVE-2026-75915CodeWhale before 0.8.64 Environment Variable Leak via js_execution
    34Monitor
  • CVE-2026-75914CodeWhale before 0.8.64 Path Traversal via image_analyze symlink
    34Monitor
  • CVE-2026-75913CodeWhale before 0.8.64 Argument Injection via git_show
    34Monitor

Remediation

Which version to upgrade to

Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.

Product / packageFixed versionSource
Hmbown CodeWhale0.8.41Vendor (CNA)
Hmbown CodeWhale0.8.64Vendor (CNA)
crates.io:codewhale-tui0.8.64Package registry (OSV)
npm:codewhale0.8.64Package registry (OSV)
npm:deepseek-tui0.8.41Package registry (OSV)

Exploit status

No known public exploit

No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.

Research context

For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.

Timeline

From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.

No dated events beyond publication.

EPSS, last 120 days

FIRST EPSS daily score; only changes of 0.01 or more are recorded (step chart).

Patch and commit links

Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.

Credits

All researchers

Finders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.

Variant candidates

Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.

  • CVE-2026-4531182 days apartCodeWhale: run_tests Tool Enables RCE via Malicious Repository Without Approval
    38Monitor
  • CVE-2026-4537482 days apartCodeWhale: task_create Insecure Defaults Enable RCE via Prompt Injection in Project Files
    38Monitor
  • CVE-2026-759110 days apartCodeWhale before 0.8.64 Remote Code Execution via allow_shell
    34Monitor

Chain candidates

An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.

—

Bug bounty scope

No known public program.

Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).

Technical details

Attack conditions

  • Someone with local access to the system can trigger it.
  • No account or password is required.
  • No special conditions are required; it is repeatable.

If successful

Confidentiality
Integrity
Availability
Attack vector
Local
Attack complexity
Low
Privileges required
None
User interaction
P
Scope
X

Weakness class (CWE)

CWE-94 · Improper Control of Generation of Code ('Code Injection')

CVSS vector

CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

nvd-secondary

Attack context

MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.

Change log

  1. Fix✗ → ✓

For records you follow, these changes also arrive as notifications. →

References

Vendor advisories and official records. Exploit/PoC links are deliberately left out.

All records