CVE-2026-4964
letta-ai letta File URL message_helper.py _convert_message_create_to_message server-side request forgery
- State
- Published
- Severity
- 5.3 Medium
- Published
- Mar 27, 2026
- Updated
- Mar 31, 2026
- Reserved
- Mar 27, 2026
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.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 4.0 | 5.3 Medium | CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P | VulDB |
| 3.1 | 6.3 Medium | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L/E:P/RL:X/RC:R | VulDB |
| 3.0 | 6.3 Medium | CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L/E:P/RL:X/RC:R | VulDB |
| 2.0 | 6.5 Medium | AV:N/AC:L/Au:S/C:P/I:P/A:P/E:POC/RL:ND/RC:UR | VulDB |
Weaknesses
- CWE-918 Server-Side Request Forgery
Affected Products
| Product | Versions |
|---|---|
lettaletta-ai |
|
References
- VDB-353841 | letta-ai letta File URL message_helper.py _convert_message_create_to_message server-side request forgeryvdb-entrytechnical-description
- VDB-353841 | CTI Indicators (IOB, IOC, IOA)signaturepermissions-required
- Submit #777645 | letta-ai letta 0.16.4 CWE-918third-party-advisory
- https://gist.github.com/YLChen-007/fde4d5ed6ac4aa876f73f8954c6214daexploit
Every record here comes from the CVE Program’s CVE List. © 1999–2026 The MITRE Corporation. CVE is a registered trademark of The MITRE Corporation. The records are reproduced under the CVE Program terms of use.