How broadly exploitable is this vulnerability?

Exploitability depends on how the host application exposes `resolve_type` or the surrounding parsing functionality. If untrusted users can influence the expressions or directives passed into this logic, exploitation can be remote and impactful; in tightly controlled deployments where only trusted administrators provide such input, the risk is lower but still present.

Does an attacker need authenticated access to exploit this?

Not necessarily. The key requirement is the ability to supply data that ultimately reaches the vulnerable function. In some integrations this may require authenticated API access, while in others a public endpoint, plugin, or workflow may forward anonymous user input into the parser.

What is the safest general fix pattern for developers using similar functionality?

The safest pattern is to remove or strictly limit dynamic evaluation: replace code-evaluating APIs with deterministic parsing that resolves only a predefined set of tokens or types, backed by a whitelist. Inputs should be validated against a clear grammar or schema, and anything outside that definition should be rejected rather than "cleaned."

Severity:

HIGH RISK

(7.3)

Code Injection via Improper Neutralization in resolve_type (CWE-94) in letta-ai letta

CVE-2026-4965

Published:

Mar 27, 2026

Status:

Analyzed

Summary

Affected Context

Exploit Preconditions

Why This Happens

Potential Impact

General Mitigation Guidance

How Teams Detect Issues Like This

Frequently Asked Questions

Source

NDV

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CWE-94

HIGH RISK

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PHP Code Injection via File Upload (CWE-94) in Aero CMS Admin Post Creation

Remote Code Execution by authenticated users via malicious file upload

May 10, 2026

CWE-94

HIGH RISK

HIGH

(8.8)

Code Injection (CWE-94) via Module Parameters in Evolution CMS

Remote Code Execution by Authenticated Users

May 10, 2026

Vulnerability Type

Category:

Code Injection / Dynamic Evaluation Vulnerability

CWE:

CWE-94;CWE-95

Impact:

Remote Code Execution

Severity:

HIGH RISK

(7.3)

CVSS Version:

3.1

Vulnerability Type

Category:

Code Injection / Dynamic Evaluation Vulnerability

CWE:

CWE-94;CWE-95

Impact:

Remote Code Execution

Severity:

HIGH RISK

(7.3)

CVSS Version:

3.1

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Code Injection via Improper Neutralization in resolve_type (CWE-94) in letta-ai letta

Summary

Affected Context

Exploit Preconditions

Why This Happens

Potential Impact

General Mitigation Guidance

How Teams Detect Issues Like This

Frequently Asked Questions

Source

Recent Vulnerabilities

HIGH RISK

HIGH

(8.8)

PHP Code Injection via File Upload (CWE-94) in Aero CMS Admin Post Creation

HIGH RISK

HIGH

(8.8)

Code Injection (CWE-94) via Module Parameters in Evolution CMS

Vulnerability Type

Vulnerability Type

Vulnerability Type

Catch This CVE While Code Is Being Written

Ship clean & secure code faster

Ship clean & secure code faster

Ship clean & secure code faster

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