CVE-2026-4964

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.

CVSS v3 6.3 MEDIUM
CVSS v2.0 6.5 MEDIUM

6.3^/10

CVSS v3 : MEDIUM

Vector :

Exploitability : 2.8 / Impact : 3.4

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required LOW

User Interaction NONE

Confidentiality Impact LOW

Integrity Impact LOW

Availability Impact LOW

Scope UNCHANGED

6.5^/10

CVSS v2.0 : MEDIUM

Vector : AV:N/AC:L/Au:S/C:P/I:P/A:P

Exploitability : 8.0 / Impact : 6.4

Access Vector NETWORK

Access Complexity LOW

Authentication SINGLE

Confidentiality Impact PARTIAL

Integrity Impact PARTIAL

Availability Impact PARTIAL

References

Link	Resource
https://gist.github.com/YLChen-007/fde4d5ed6ac4aa876f73f8954c6214da	Exploit Third Party Advisory
https://vuldb.com/?ctiid.353841	Permissions Required VDB Entry
https://vuldb.com/?id.353841	Third Party Advisory VDB Entry
https://vuldb.com/?submit.777645	Exploit Third Party Advisory VDB Entry

Configurations

Configuration 1 (hide)

cpe:2.3:a:letta:letta:0.16.4:*:*:*:*:*:*:*

History

No history.

Information

Published : 2026-03-27 17:16

Updated : 2026-06-17 10:57

NVD link : CVE-2026-4964

Mitre link : CVE-2026-4964

CVE.ORG link : CVE-2026-4964

JSON object : View

Products Affected

letta

letta

CWE

CWE-918

Server-Side Request Forgery (SSRF)

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