Archer Special Advisory: Anthropic Mythos

Archer Special Advisory: Anthropic Mythos

Special advisories relate to CVEs and security events with broad industry interest even when we know our products and platforms are not affected.

Applies To

Anthropic Mythos info published by TechCrunch: Unauthorized group has gained access to Anthropic's exclusive cyber tool Mythos, report claims | TechCrunch

Details

Archer is aware of the announcement on April 21, 2026, regarding unauthorized access to Anthropic Mythos and subsequent news surrounding implications.

Archer has policies, procedures and monitoring in place on its infrastructure and our customer-provided infrastructure. Our platform code is developed under an SDLC that includes various security controls and scanners that secure code creation against those controls. Sending proprietary or customer data into AI like one of the LLMs on AWS Bedrock is no different than sending customer data to any other provider or tool and subject to the same contractual declarations and protections that we would have for any other utility.

Archer's security program is not static and continues to evolve to defend against emerging threats. We incorporate AI across our InfoSec tooling to advance real‑time monitoring, accelerate vulnerability management workflows, and reinforce our hardening strategies.

Vulnerabilities in Archer products are disclosed for all customers simultaneously under policies outlined in the Vulnerability Response Policy.

Details of Archer public-facing policies, and artifacts can be found in the Archer Trust Center.

Archer continues to monitor the situation.

Legal Information

Read and use the information in this Archer Security Advisory to assist in avoiding any situation that might arise from the problems described herein. If you have any questions regarding this advisory, contact Archer Technical Support. Archer distributes Archer Security Advisories in order to bring to the attention of users of the affected Archer products important security information.

Originally posted on May 5, 2026 in the Archer Community.