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6.5 Medium

CVE-2026-107717 Banks generates meaningful LLM prompts using a simple template language

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.

Affected products and versions

Product Affected versions Fixed in
banks 2.5 earliest → < 2.5.0 2.5.0

References

Timeline

  1. Published
  2. Last modified

Other CVEs of banks

The 6 CVEs of banks →
CVE-2026-107716 Banks generates meaningful LLM prompts using a simple template language 7.3 High CVE-2026-71492 Banks generates meaningful LLM prompts using a simple template language 6.0 Medium CVE-2026-61536 Banks generates meaningful LLM prompts using a simple template language 7.5 High CVE-2026-62663 Banks generates meaningful LLM prompts using a simple template language 7.5 High
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