Vulnerability in Meta Platforms, Inc Llama Stack

CVE-2025-55178

Llama Stack prior to version v0.2.20 accepted unverified parameters in the resolve_ast_by_type function which could potentially allow for remote code execution.

Published · last modified .

CVSS v3 metric

CVSS v3 base score 5.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N.

EPSS exploit prediction

EPSS: 0.005 (40.9th percentile), scored .

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 41st percentile — 40.9% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS trend (30 days)EPSS over the last 30 days for CVE-2025-55178: held from 0.005 to 0.005.

EPSS over last 30 days · oldest: 0.005 · newest: 0.005 · change: 0.000

Affected products

References

Frequently asked questions

What is CVE-2025-55178?
CVE-2025-55178 is a medium-severity vulnerability in Meta Platforms, Inc Llama Stack, classified under CWE-78: IMPROPER NEUTRALIZATION OF SPECIAL ELEMENTS USED IN AN OS COMMAND ('OS COMMAND INJECTION'). CVSS score: 5.3/10. Published 2025-09-24.
How severe is CVE-2025-55178?
Medium severity. CVSS v3 base score is 5.3 out of 10.