Claude Opus 5.5 Prompt Injection: Stronger Against Web Pages, Weaker Against Pasted Text
Anthropic’s system card for Claude Opus 5.5 makes two statements about prompt injection, one after the other, in its executive summary. Read…
Information security is the practice of protecting systems, data, and users from compromise and loss. Articles in this category cover threat models, social engineering, authentication, compliance considerations, and the operational habits that keep an organization defensible at scale.
Anthropic’s system card for Claude Opus 5.5 makes two statements about prompt injection, one after the other, in its executive summary. Read…
MCP authentication entered CISA’s Known Exploited Vulnerabilities catalog for the first time on 2 September 2026, and the bug underneath it is…
Attackers began exploiting an unauthenticated code execution flaw in Langflow, the open-source visual builder for LLM and agent workflows, on August 30,…
WordPress 7.1.1 shipped on September 17, 2026 carrying eleven security fixes, seventeen core bug fixes and nineteen fixes for the block editor.…
Nothing you have deployed on your site governs agent write access. Not robots.txt, not your Cloudflare bot rules, not any licensing arrangement…
Sixteen contributed module advisories landed on September 2, 2026, five of them rated Critical. Fifteen landed the week before. It is tempting…
A self-replicating worm has been moving through the npm registry since September 2025, and the variant researchers were writing about last month…
Ten Drupal security advisories for contributed modules published on August 26, 2026, running from SA-CONTRIB-2026-108 to SA-CONTRIB-2026-117, every one rated moderately critical.…
Anthropic has told affected Claude users that a bad actor is using commodity infostealer malware to lift active login sessions off their…
The interesting security question about AI agents in 2026 has stopped being what the model will say and started being what the…