CVE-2026-4964 Details
Description
A security vulnerability has been detected in letta-ai letta 0.16.4. This vulnerability affects the function _convert_message_create_to_message of the file letta/helpers/message_helper.py of the component File URL Handler. Such manipulation of the argument ImageContent leads to server-side request forgery. It is possible to launch the attack remotely. The exploit has been disclosed publicly and may be used. The vendor was contacted early about this disclosure but did not respond in any way.
A server-side request forgery (SSRF) vulnerability has been identified in letta-ai letta version 0.16.4. The issue arises in the File URL Handler component, specifically within the _convert_message_create_to_message function of letta/helpers/message_helper.py. This vulnerability allows remote exploitation by manipulating the ImageContent argument to include file:// URLs, which the server then processes without proper validation. As a result, an attacker can read arbitrary files from the server's filesystem, including sensitive environment variables and application secrets.
Metrics
CVSS 4.0 Severity and Vector Strings:
CVSS 3.x Severity and Vector Strings:
No data available for CVSS Version 2.0 on this CVE.
CISA-ADP
Assessed Mar 31, 2026References to Advisories, Solutions, and Tools
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| URL | Source(s) | Tag(s) |
|---|---|---|
| https://gist.github.com/YLChen-007/fde4d5ed6ac4aa876f73f8954c6214da | [email protected] | ExploitThird Party Advisory |
| https://vuldb.com/?ctiid.353841 | [email protected] | Permissions RequiredVDB Entry |
| https://vuldb.com/?id.353841 | [email protected] | Third Party AdvisoryVDB Entry |
| https://vuldb.com/?submit.777645 | [email protected] | ExploitThird Party AdvisoryVDB Entry |
Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| CWE-918 | Server-Side Request Forgery (SSRF) | [email protected] |
Affected Products
| Product | Versions |
|---|---|
| letta letta | 0.16.4 |
CPE
Remediation
| |
Change History
6 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Jun 17, 2026 | CVE Modified | [email protected] |
| Jun 17, 2026 | CVE Modified | CISA-ADP |
| Apr 29, 2026 | Initial Analysis | [email protected] |
| Apr 29, 2026 | Data Remediation | [email protected] |
| Mar 27, 2026 | CVE Modified | [email protected] |
| Mar 27, 2026 | New CVE Received | [email protected] |