6.5

CVE-2026-29791: agentgateway Improper Input Validation

CVSS: 6.5v3.1MediumAnalyzed
AliasesGHSA-v2x6-wwfw-r2rq
Published 06-03-2026Last modified 09-03-2026
Open JSON

Vulnerability summary

CVE-2026-29791 is a medium (CVSS 6.5) Improper Input Validation vulnerability in agentgateway. EPSS estimates a 0.25% chance of exploitation in the next 30 days, higher than 15.3% of scored vulnerabilities.

Overall risk
26/100
0100
Medium · default modelHow is this calculated?
CVSS score
6.5/10
010
Medium · v3.1 (NVD)
EPSS score
0.25%
0%100%
Low · +0.11 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Timeline

  1. 06-03-2026
    PublishedVulnerability first disclosed.
  2. 09-03-2026
    Last modifiedVulnerability information updated.

Description

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.

CVSS metrics

3 scores · 3 sources · 1 version

EPSS trend

Probability

0.25%

Chance of exploitation in the next 30 days

Percentile

15%

Versus all other CVEs

30-day change

+0.11 pp

From 0.14% on 19-09-2026

19-09-202619-10-2026
EPSS score
0.25%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Agentgateway1 product
Github.com/agentgateway1 product
  • agentgateway< 0.12.0
Lfprojects1 product

3 vendors · 3 products

References

4 links