Live AI Security Brief for July 29, 2026: Agents, Prompt Injection, and Model Risk

CVE-2026-55255: Langflow cross-user flow authorization bypass

NIST NVD and CISA KEV | July 7, 2026 | Known Exploited | CVSS 8.4 | Langflow Langflow before 1.9.1

Before version 1.9.1, an authenticated attacker could specify another user's flow ID and execute that flow. The CNA rates the issue 8.4 High, and CISA lists active exploitation.

Why it matters: Langflow Langflow before 1.9.1 can combine untrusted text with connectors, stored credentials, and tool permissions. The meaningful risk is what the surrounding agent is allowed to read, change, or send.

What to verify: Test with hostile input in an isolated environment, inspect connector scopes and retained context, require approval for sensitive actions, and confirm that tool calls are logged and attributable.

CISA remediation date: 2026-07-10. Apply the current Langflow fix and follow CISA KEV remediation guidance.

Operational focus: Inventory tool permissions, connector access, stored credentials, and network reach available to the agent.

Open the original NIST NVD and CISA KEV record

CVE-2026-0770: Langflow Inclusion of Functionality from Untrusted Control Sphere Vulnerability

CISA Known Exploited Vulnerabilities | July 21, 2026 | Known Exploited | Langflow Langflow

Langflow contains an inclusion of functionality from untrusted control sphere vulnerability that allows remote attackers to execute arbitrary code on affected installations.

Why it matters: Langflow Langflow can combine untrusted text with connectors, stored credentials, and tool permissions. The meaningful risk is what the surrounding agent is allowed to read, change, or send.

What to verify: Test with hostile input in an isolated environment, inspect connector scopes and retained context, require approval for sensitive actions, and confirm that tool calls are logged and attributable.

CISA remediation date: 2026-07-24. Apply mitigations in accordance with vendor instructions, ensuring compliance with CISA’s BOD 26-04 Prioritizing Security Updates Based on Risk (see URL in Notes) guidance…

Operational focus: Treat repository text, retrieved documents, web pages, and user prompts as untrusted input.

Open the original CISA Known Exploited Vulnerabilities record

CVE-2026-13442: IBM Langflow OSS 1.0.0 through 1.10.1 can allow an attacker to reuse…

NIST National Vulnerability Database | July 29, 2026 | HIGH | CVSS 7.1

IBM Langflow OSS 1.0.0 through 1.10.1 can allow an attacker to reuse another user's FAISS namespace to access owner-only vector content and influence later query results. This causes cross-user information disclosure and limited integrity impact through persistent poisoning of returned results.

Why it matters: CVE-2026-13442 can combine untrusted text with connectors, stored credentials, and tool permissions. The meaningful risk is what the surrounding agent is allowed to read, change, or send.

What to verify: Test with hostile input in an isolated environment, inspect connector scopes and retained context, require approval for sensitive actions, and confirm that tool calls are logged and attributable.

Operational focus: Require approvals and durable logs before an agent changes data or invokes sensitive tools.