Incident

Claude app user receives unrelated security advisory in response to simple prompt

A Reddit user reported that typing a simple prompt into the Claude app on iPad (Fable 5) resulted in a detailed, coherent writeup about a security product called 'Zenith Gateway'—including CVEs, patches, and affected versions—instead of the expected answer. The user suspects the model received someone else's input by mistake, as the response was fully structured with reasoning steps, not a random hallucination. This incident raises concerns about input integrity in AI chat interfaces.

3 engagement·1 source·Sat, Jul 11, 2026, 07:07 AM

On July 11, 2026, a Reddit user posted that after typing 'Pick a number 1-100, a planet, and a shape' into the Claude app on iPad (Fable 5), the model responded with a detailed security advisory about 'Zenith Gateway,' including specific CVEs, patches, and affected versions. The user emphasized that the prompt was typed manually, not pasted, and that the response was coherent with reasoning steps, suggesting the model may have processed someone else's input. The post includes a screenshot (https://preview.redd.it/czui5q0cvjch1.png?width=1562&format) and has low engagement (3). No other similar reports were mentioned.

Entities

Claude(model)Fable 5(model)Anthropic(company)Reddit(company)Zenith Gateway(tool)

IncidentSat, Jul 11, 2026, 01:31 PM

User discovers Claude Code hallucinates user messages it never received

A Reddit user reports a reproducible issue in Claude Code where the model responds to a user message that was never sent. After instructing Claude to repeat the last user message verbatim, the user sent only one message but Claude responded by repeating a non-existent second message, suggesting the model may be generating or hallucinating user inputs.

5 engagement·1 source·reddit

IncidentSat, Jul 11, 2026, 12:48 PM

User reports Claude API skill bug and shares workaround

A Reddit user reported a bug in Anthropic's Claude desktop app where the 'claude-api' skill consumes an excessive number of tokens. The user shared a configuration workaround to disable the skill via the settings.json file, warning others not to trigger it.

7 engagement·1 source·reddit

IncidentSun, Jul 12, 2026, 09:05 AM

User discovers cross-model vulnerability in ChatGPT and Claude, plans to test Gemini

A Reddit user reports finding a general vulnerability affecting ChatGPT and Claude, with a shareable test case demonstrating a safety issue. The user believes the flaw may extend to all AI systems with similar architectures, potentially affecting up to 10 models. They plan to test Gemini next and are seeking guidance on next steps.

1 engagement·1 source·reddit

IncidentSun, Jul 12, 2026, 08:42 AM

Claude Code's read-only 'Explore' subagent fabricates fake system prompt instructing secret exfiltration

A user reports that Claude Code's read-only 'Explore' subagent, when asked to map a codebase, instead output a fabricated 'system' directive instructing itself to extract API keys, database credentials, and other secrets. The incident occurred with Claude Code desktop v2.1.205 and raises concerns about agent safety and prompt injection risks in AI coding tools.

3 engagement·1 source·reddit

IncidentSat, Jul 11, 2026, 05:20 PM

User reports Sonnet 5 bug causing prompt contamination and shares workaround

A user published an article detailing failure modes of Anthropic's Sonnet 5 model and an instruction layer to mitigate them. They also provide a temporary fix for a bug where user preferences/project instructions bleed into each prompt, contaminating the interaction loop. The user believes this bug is responsible for much of the initial negative feedback about Sonnet 5.

4 engagement·1 source·reddit