CVE-2026-7439: AgentFlow Local Web API Content-Type Validation Bypass

Severity: medium (CVSS 4.4 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.1% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2026-04-29 · updated 2026-10-26
Weakness: CWE-346

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.

References

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

Get alerted when CVE-2026-7439 or the next vulnerability affects your stack