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CVE-2026-107717

6.5 · MEDIUM

Banks generates meaningful LLM prompts using a simple template language.

Published Oct 8, 2026CWE-20EPSS 0.34%

Overview

CVE-2026-107717 is a medium-severity vulnerability. It was published on October 8, 2026 and has a CVSS 3.1 base score of 6.5 (MEDIUM).

This vulnerability has a CVSS 3.1 base score of 6.5, rated MEDIUM. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

Technical description

Banks generates meaningful LLM prompts using a simple template language. Prior to 2.5.0, Banks Prompt.chat_messages() attempts to parse every line of rendered template output as ChatMessage JSON. When an application renders untrusted data and passes the returned ChatMessage objects to an LLM provider, attacker-controlled JSON can cross the prompt boundary and become a system, assistant, or tool message because ChatMessage.role accepts arbitrary strings. This can override application instructions, alter the intended prompt structure, or confuse downstream tool and message handling. This issue is fixed in version 2.5.0.

Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

References

GitHubgithub.com/masci/banks/commit/02172b816fb84f6a824cc09a8aca7416f53c12cbGitHubgithub.com/masci/banks/pull/78GitHubgithub.com/masci/banks/releases/tag/v2.5.0GitHubgithub.com/masci/banks/security/advisories/GHSA-hmq2-7hp6-7crhGitHubgithub.com/masci/banks/security/advisories/GHSA-hmq2-7hp6-7crh

How CyberStrike helps

Frequently asked questions

What is CVE-2026-107717?

CVE-2026-107717 is a medium-severity vulnerability. It was published on October 8, 2026 and has a CVSS 3.1 base score of 6.5 (MEDIUM).

How severe is CVE-2026-107717?

This vulnerability has a CVSS 3.1 base score of 6.5, rated MEDIUM. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

How do I fix or remediate CVE-2026-107717?

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

How can CyberStrike help with CVE-2026-107717?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2026-107717 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

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