CVE-2026-7439

MEDIUM 4.4

AgentFlow Local Web API Content-Type Validation Bypass

CVSS Score

4.4

EPSS Score

0.0%

EPSS Percentile

0th

AgentFlow's local web API accepts non-JSON content types on POST /api/runs and POST /api/runs/validate endpoints without enforcing application/json validation, allowing attackers to bypass trust-boundary enforcement on sensitive operations. Attackers can exploit this content-type validation weakness through browser-driven or local cross-origin requests to abuse the localhost API and enable attack chains against the local control plane.

CWE	CWE-346
Vendor	berabuddies
Product	agentflow
Published	Apr 29, 2026
Last Updated	Apr 29, 2026

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CVSS v3 Breakdown

CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N

Attack Vector

Local

Attack Complexity

Low

Privileges Required

None

User Interaction

Required

Scope

Unchanged

Confidentiality

Low

Integrity

Low

Availability

None

Affected Versions

berabuddies / AgentFlow

0 < 1667fa3

References

NVD ↗ CVE.org ↗ EPSS Data ↗

github.com: https://github.com/berabuddies/agentflow/pull/18 github.com: https://github.com/berabuddies/agentflow/commit/1667fa3 vulncheck.com: https://www.vulncheck.com/advisories/agentflow-local-web-api-content-type-validation-bypass

Credits

Chia Min Jun Lennon