CVE-2026-7439

AgentFlow Local Web API Content-Type Validation Bypass

State: Published
Severity: 4.8 Medium
Published: Apr 29, 2026
Updated: Jun 23, 2026
Reserved: Apr 29, 2026

Description

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.

Scores

CVSS	Score	Vector	Source
4.0	4.8 Medium	CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N	VulnCheck
3.1	4.4 Medium	CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N	VulnCheck

Weaknesses

CWE-346 Origin Validation Error

Affected Products

Product	Versions
AgentFlowberabuddies	before 1667fa3Affected

References

https://github.com/berabuddies/agentflow/pull/18issue-tracking
https://github.com/berabuddies/agentflow/commit/1667fa3patch
https://www.vulncheck.com/advisories/agentflow-local-web-api-content-type-validation-bypassthird-party-advisory

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