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    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.

    Published:Mar 27, 2026
    Last Modified:Apr 29, 2026
    EPS:Mar 27, 2026
    EPSS Score:0.00014
    CVSS Score:6.3

    Affected Products

    Vendor
    Letta
    Product
    Letta

    Exploits

    https://gist.github.com/YLChen-007/fde4d5ed6ac4aa876f73f8954c6214dahttps://vuldb.com/?submit.777645

    Common Attack Pattern Enumeration and Classification (CAPEC)

    CAPEC-664 Server Side Request Forgery

    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High