What is CVE-2026-29791?

CVE-2026-29791 is a medium-severity vulnerability in Agentgateway, classified under Improper Input Validation. CVSS score: 4.9/10. Published 2026-03-06.

How severe is CVE-2026-29791?

Medium severity. CVSS v3 base score is 4.9 out of 10.

Improper input validation in Agentgateway

CVE-2026-29791

Agentgateway is an open source data plane for agentic AI connectivity within or across any agent framework or environment. Prior to version 0.12.0, when converting MCP tools/call request to OpenAPI request, input path, query, and header values are not sanitized. This issue has been patched in version 0.12.0.

Vulnerability class: Drupalgeddon 2 (CVE-2018-7600)

EPSS: 0.001 (4.1th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 4.9 (Medium). Vector: CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:L/I:L/A:N.

Affected products

Agentgateway — versions < 0.12.0
Lfprojects Agentgateway

Weakness classification (CWE)

CWE-20 — Improper Input Validation

References

security-advisories@github.com (x_refsource_CONFIRM, Vendor Advisory)

Frequently asked questions

What is CVE-2026-29791?: CVE-2026-29791 is a medium-severity vulnerability in Agentgateway, classified under Improper Input Validation. CVSS score: 4.9/10. Published 2026-03-06.
How severe is CVE-2026-29791?: Medium severity. CVSS v3 base score is 4.9 out of 10.