unknownclosedno fix needed
Anthropic investigates unauthorized access to Claude Mythos Preview via vendor
› Anthropic Claude Mythos Preview (vendor environment)
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- started
- Apr 1, 2026
- closed
- Apr 30, 2026
- CVEs
- none
- sources
- 1
## summary
In April 2026 Anthropic said it was investigating reports that unauthorized users accessed its unreleased vulnerability-discovery tool Claude Mythos Preview through a third-party vendor environment rather than a direct Anthropic system compromise (Bloomberg / CRN reporting).
severity: Vendor access incident
## affected
- n/a
## fixed in
no fixed release yet
## news & write-ups[1]
## notes & caveats
Details limited to company statements via press; no CVE.
