CVE-2026-4964
MEDIUMletta-ai letta File URL message_helper.py _convert_message_create_to_message server-side request forgery
Title source: cnaDescription
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 v3
6.3
EPSS
0.0001
EPSS Percentile
2.9%
Attack Vector
NETWORK
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L
CISA SSVC
Vulnrichment
Exploitation
poc
Automatable
no
Technical Impact
partial
Details
CWE
CWE-918
Status
published
Products (1)
letta-ai/letta
0.16.4
Published
Mar 27, 2026
Tracked Since
Mar 29, 2026