CVE-2026-4964CWE-918

letta-ai letta File URL message_helper.py _convert_message_create_to_message server-side request forgery

Medium · published March 27, 2026

CVSS v4.0
5.3
EPSS
0%
Percentile
31.9
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v4.0
5.3 · MEDIUM
Vector
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
EPSS
0.00390 · 31.9th percentile
Weakness
CWE-918 · Server-Side Request Forgery (SSRF)
Published
2026-03-27T17:05Z
EPSS history
Timeline
  • 27 MAR 17:05Z
    letta-ai letta File URL message_helper.py _convert_message_create_to_message server-side request forgery
    cvelistv5