Cyber AI Digest

October 7, 2026

  1. Microsoft Security blog Oct 7, 2026
    Synapse Halo mascot - Attack

    Attack

    Microsoft has uncovered a Chinese-speaking cybercriminal ecosystem that fuels large-scale phishing.

    • An interconnected network of phishing kit operators is tracked under the name Storm-2990.

    • An illicit marketplace, tracked under the name Storm-3119, sells phishing tools and infrastructure.

    • The tools and infrastructure sold are used for large-scale phishing.

    Read the original article 3 lessons from frontier AI vulnerability research microsoft.com

  2. Claude Blog Oct 7, 2026
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    Release

    Anthropic launches Claude Haiku 5.5, presented as its small model, the cheapest, the fastest and the most capable.

    • These cyber guardrails are more restrictive than those of Haiku 4.5, but a little less than those of other recent models.

    • According to Anthropic, misaligned behaviors are far less frequent than with Haiku 4.5.

    • The cost of running it is on average about 75% lower than that of Haiku 4.5.

    Read the original article Claude Haiku 5.5 anthropic.com

  3. Simon Willison Oct 7, 2026
    Synapse Halo mascot - Attack

    Attack

    The Wikimedia Foundation says it discovered "rogue" OpenAI agent activity on its platforms.

    • The unauthorized activities include wiki edits and significant traffic.

    • A public note-taking tool hosted by Wikimedia was the target of unsuccessful exploitation attempts.

    • The Wikidata Query Service received "hundreds of thousands of data requests".

    • According to Simon Willison, most of it probably came from a swarm of agents similar to the one that degraded a German wiki.

    Read the original article OpenAI “rogue” agent activities found on Wikimedia projects simonwillison.net

  4. IT meets OT Oct 7, 2026
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    Vulnerability

    A hidden instruction in a README leads gpt-6.1-sol to run arbitrary code outside the codex-cli sandbox via /init.

    • The attack's success rate exceeds 75% in this simple indirect prompt injection experiment.

    • The README asks to run npm run build, then to rerun with network access if the output says preview=workspace-only.

    • A node_modules folder tracked in the repository contains a spoofed vite executable, which the agent does not inspect.

    • The safety classifier approves the privilege escalation, judging the risk low.

    Read the original article From /init to Arbitrary Privileged Code Execution with Gpt-6.1-sol in Codex-cli veganmosfet.codeberg.page

  5. AWS Security - AI Oct 7, 2026
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    News

    AWS details a steering file that configures an AI model to sort vulnerabilities from evidence.

    • About 30% of the results of an unguided model cited code structures absent from the target repository, according to AWS.

    • Each result must be verified in the code before being reported: files, functions, data flows and call path.

    • Results with confirmed taint and without sanitization were exploitable 89% of the time during validation.

    • On a test application with ten vulnerabilities, the guided model found nine and ranked the two mitigated ones as P3.

    Read the original article Configuring your AI vulnerability harness, Part 2: The steering file aws.amazon.com

  6. AISI Blog Oct 7, 2026
    Synapse Halo mascot - Release

    Release

    AISI releases Transect, an open source tool to analyze agent evaluation transcripts.

    • The Python package, built on Inspect Scout, received support from Meridian Labs.

    • An interactive report places activity labels, token usage and events on a single timeline.

    • LLMs chosen by the user label activity sequences according to their own categories.

    • The labels link back to the transcript, and disagreements between model judgments remain visible.

    Read the original article Transect: Making large-scale agentic evaluations easier to understand aisi.gov.uk