Letta through 0.16.8 Insecure Default Configuration Unauthenticated API and PostgreSQL Access
Letta through 0.16.8 ships a compose.yaml that does not enable LETTA_SERVER_SECURE, so the password middleware is never added and all API routes are unauthenticated, and it exposes a superuser PostgreSQL port with default credentials. Remote attackers can execute arbitrary Python via POST /v1/tools/run, manage /v1/admin users, or run OS commands via COPY PROGRAM.
CVE-2026-77936
Primary source · Revision 1
Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.
Security context
Source reference: cve:CVE-2026-77936
letta
Source reference: /containers/cna/affected/0/product
- Affected versions
- Not stated in this record
- Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
Structured affected-version data
Original package identities and version rules from this source.
[
{
"repo": "https://github.com/letta-ai/letta",
"vendor": "letta-ai",
"product": "letta",
"versions": [
{
"status": "affected",
"version": "0",
"versionType": "semver",
"lessThanOrEqual": "0.16.8"
}
],
"packageURL": "pkg:pypi/letta",
"collectionURL": "https://pypi.org",
"defaultStatus": "unaffected"
}
]- Related CVEs
- CVE-2026-77936
Source reference:
/cveMetadata/cveId
Publisher severity
critical
Source reference: /containers/cna/metrics
- Event
- #42366 · Revision 1
- Added to Heist Feed
- Publisher date