ClaimMirage: When Self-Claims in Domain Names Change LLM Threat Judgments

Reported by arXiv cs.CR (Daiki Chiba, Hiroki Nakano, Takashi Koide)

Summary by Cyber Security News25 Sep 2026, 06:00 CEST

About this summary. This is a short, independently written summary of an article first published by arXiv cs.CR. Cyber Security News did not report or verify the underlying story. Read the original: https://arxiv.org/abs/2609.29130

arXiv:2609.29130v1 Announce Type: new Abstract: Short claims such as not-phishing or official can change how a large language model (LLM) judges a domain name, without explicit prompt-injection commands. We study this manipulation as ClaimMirage: a name under inspection claims its own safety or approval. We analyze 622,080 judgments across 64 brands and five LLMs, comparing ten claims with length- and hyphen-matched controls in constructed brand-like names.

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