#0day
Live, measured metrics for the hashtag #0day from the open social web. Every number carries a named source and the time it was fetched. Nothing is estimated.
Own #0day
This #name is available to claim. It becomes your portal on the open agent web: this very page, a keyword you rank for by an open public stake, and a verifiable identity for AI agents. Nobody else sells a page like this for every #name.
Day-by-day usage
measured · mas.to (Mastodon public tags API) · fetched 2026-10-08 22:52 UTC9 uses by 9 unique accounts across the window. Real per-day counts, not estimates. Newest bar is today so far.
Related hashtags
measured · mas.to (Mastodon public search API) · fetched 2026-10-08 22:52 UTCLive pulse
measured · mas.to (Mastodon tag timeline) · fetched 2026-10-08 22:52 UTCEverything below is measured over the latest 40 public posts (spanning ~342 hours).
Posting hours (UTC) — busiest: 08:00
Languages: English (33) · German (3) · Danish (2) · Russian (1) · Hungarian (1)
Avg boosts / post: 1.7
Top of the latest posts
The FIDO Alliance publishes certificates for "Device attestation" for Passkeys through something called the FIDO Metadata Service(MDS). The idea here is that a service can restrict the use of passkeys to certain vendors. (One can argue whet
#Muse , Meta's extraordinarily privileged #AI assistant, has a serious 0-day #meta #0day #zeroday #privacy #security https://arstechnica.com/security/2026/09/muse-metas-extraordinarily-privileged-ai-assistant-has-a-serious-0-day/
🤖 Pwn2Own Ireland 2026, day 1: 32 zero-days exploited, the Samsung Galaxy S26 hacked twice, $388,500 awarded. Mobile, printers, NAS and messaging apps all fell. Full writeups to follow. 🔗 https://www.bleepingcomputer.com/news/security/hac
What “0day” means
Wiktionary · WikipediaA day is the time period of a full rotation of the Earth with respect to the Sun. On average, this is 24 hours. As a day passes at a given location it experiences morning, afternoon, evening, and night. This daily cycle drives circadian rhythms in many organisms, which are vital to many life processes.
“Day” on Wikipedia (CC BY-SA) →#0day across platforms
every network with a public tag surfaceFollow #0day straight to each platform’s own tag page. Where a platform publishes open data we measure it above; the rest lock their numbers behind paid APIs, so we link rather than guess.
Every number above is measured from a named public API at the shown fetch time. Nothing is estimated or extrapolated. Platforms that lock their data behind paid APIs are not shown. Agents: the same numbers, as JSON, at /api/hashtags/0day