Anthropic's super bug-hunting model Mythos is hardcore good at math, as latest vuln under attack shows
HFS is an open source web file server that previously appeared on the US Cybersecurity and Infrastructure Security Agency’s catalog of Known Exploited Vulnerabilities in 2024. On Wednesday, researcher Zach Hanley at AI pen-testing company Horizon3 said he used Mythos to uncover a new flaw in the file server, now tracked as CVE-2026-61500. If you use Rejetto HFS, be sure to update to v3.2.1 or later, which fixes this and other security flaws.
- ▪HFS is an open source web file server that previously appeared on the US Cybersecurity and Infrastructure Security Agency’s catalog of Known Exploited Vulnerabilities in 2024.
- ▪On Wednesday, researcher Zach Hanley at AI pen-testing company Horizon3 said he used Mythos to uncover a new flaw in the file server, now tracked as CVE-2026-61500.
- ▪If you use Rejetto HFS, be sure to update to v3.2.1 or later, which fixes this and other security flaws.
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| Canonical URL | https://www.theregister.com/security/2026/10/03/anthropics-super-bug-hunting-model-mythos-is-hardcore-good-at-math-as-latest-vuln-under-attack-shows/5300933 |
| Publication time | Sat, 03 Oct 2026 17:27:00 +0200 |
| Retrieval time | 2026-10-03T15:28:13.339Z |
| Last seen | 2026-10-03T15:28:13.339Z |
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Basis: Derived from the published RSS/Atom feed. Contact: [email protected]. Reviewed: 2026-07-24.
Opening excerpt (first ~120 words) tap to expand
(function() { let windowUrl = window.location.href; windowUrl = windowUrl.substring(windowUrl.indexOf('?') + 1); let messageElement = document.querySelector('.shareableMessage'); if (windowUrl && windowUrl.includes('code') && windowUrl.includes('expires')) { messageElement.style.display = 'block'; } })(); security Anthropic's super bug-hunting model Mythos is hardcore good at math, as latest vuln under attack shows Exploitation attempts came from China-hosted IP, VulnCheck researcher says Jessica Lyons Jessica Lyons Cybersecurity Editor Published sat 3 Oct 2026 // 16:27 UTC READ MORE arXiv imposes rate limit on paper submissions to stem the AI slop tide 21 hours ago OpenAI alerts 100+ orgs that its 'misaligned models' attempted to break in - or worse 21 hours ago Californian accused of…
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