CVE-2026-4964

MEDIUM 6.3

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

CVSS Score

6.3

EPSS Score

0.0%

EPSS Percentile

1th

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.

CWE	CWE-918
Vendor	letta-ai
Product	letta
Published	Mar 27, 2026
Last Updated	Mar 31, 2026

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CVSS v3 Breakdown

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

Attack Vector

Attack Complexity

Privileges Required

User Interaction

Scope

Confidentiality

Integrity

Availability

Affected Versions

letta-ai / letta

0.16.4

References

NVD ↗ CVE.org ↗ EPSS Data ↗

vuldb.com: https://vuldb.com/?id.353841 vuldb.com: https://vuldb.com/?ctiid.353841 vuldb.com: https://vuldb.com/?submit.777645 gist.github.com: https://gist.github.com/YLChen-007/fde4d5ed6ac4aa876f73f8954c6214da

Credits

🔍 Eric-z (VulDB User) VulDB