CVE-2026-18990

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 v4.0

5.5 MEDIUMCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

CVSS v3.1

7.3 HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L

CVSS v2.0

7.5 HIGHAV:N/AC:L/Au:N/C:P/I:P/A:P

EPSS

0.40% chance of exploitation in the next 30 days, 33th percentile

Published

2026-08-06

Proof-of-concept exploits (1)

• https://gist.github.com/YLChen-007/2ba2e586f3d16cb368c8dcd6ef680178

References

• CVE Record
• NVD entry

Related

• CVE-2026-18980
• CVE-2026-18991
• CVE-2026-18976
• CVE-2026-18992
• CVE-2026-18974
• CVE-2026-18993