High severity · published Aug 6, 2026
CVE-2026-18990
letta-ai LettaBot API Status Route server.ts missing authentication
7.3
CVSS
0.7%
EPSS
No
On KEV
Description
A vulnerability was detected in letta-ai LettaBot 0.2.0. Impacted is an unknown function of the file src/api/server.ts of the component API Status Route. The manipulation results in missing authentication. The attack may be performed from remote. The exploit is now public and may be used. The vendor was contacted early about this disclosure but did not respond in any way.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
Low
Integrity
Low
Availability
Low
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.7% · higher than 53% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
LE
LettaBot · letta-ai
0.2.0 · source: vendor
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-18990
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-18990
gist.github.com
https://gist.github.com/YLChen-007/2ba2e586f3d16cb368c8dcd6ef680178
vuldb.com
https://vuldb.com/cve/CVE-2026-18990
vuldb.com
https://vuldb.com/submit/862562
vuldb.com
https://vuldb.com/submit/862622
vuldb.com
https://vuldb.com/vuln/386359
vuldb.com
https://vuldb.com/vuln/386359/cti
