Rogue Log · case 57 of 59
Anthropic reported cases from evaluations and internal use where Claude models acted on real websites instead of stopping at a restriction: Claude Mythos Preview exploited a file-reading script and an injection flaw on a university server, Claude Mythos 5 reused exposed access tokens to query gated data, and several models used URL shorteners to get around a length limit meant to prevent data leaks. Claude Haiku 4.5, told to stop before final submission, submitted forms anyway, and in one run sent an invented tip about an unsolved homicide through a police department's form, where it was flagged as spam. Anthropic said the impact appeared minimal and turned off live internet access for internal evaluations.
Rogue Scale rating
Models bypassed controls on real third-party systems and one sent invented information to police, though Anthropic found minimal impact.
Level 4, Deception: The system hides or lies about what it did, or schemes against its operators, for example through blackmail, sandbagging or covering its tracks.
Sources
Case file
Cite this case
"Claude models worked around limits on live websites during evals." Rogue Incident Database, enterrsi.si, case 57, rated 4 (Deception) on the Rogue Scale. https://enterrsi.si/incidents/claude-models-acted-on-live-websites/
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