#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 · fosstodon.org (Mastodon public tags API) · fetched 2026-09-15 19:23 UTC14 uses by 11 unique accounts across the window. Real per-day counts, not estimates. Newest bar is today so far.
Related hashtags
measured · fosstodon.org (Mastodon public search API) · fetched 2026-09-15 19:23 UTCLive pulse
measured · fosstodon.org (Mastodon tag timeline) · fetched 2026-09-15 19:23 UTCEverything below is measured over the latest 40 public posts (spanning ~940 hours).
Posting hours (UTC) — busiest: 10:00
Languages: English (23) · German (12) · Russian (2) · Danish (2) · Italian (1)
Avg boosts / post: 0.4
Top of the latest posts
@calx THE ONLY FUNNY THING IS CONVERSATION... BUT HONESTLY THER'S NOTHING FUNNY WITH SITUATIONS LIKE THAT. #infosec #appsec #cybersecurity #selfhosted #php #websec #0day #vulnerability #cve
Hackers are actively exploiting the critical #StyleSmuggler zero-day to compromise Adobe Commerce and Magento stores, with researchers finding Linux backdoors and PHP web shells on affected systems. Listen/Read: https://hackread.com/stylesm
StyleSmuggler: Magento and Adobe Commerce 0-day RCE under active attack Pulse ID: 6aa8f7aa51de0401ca420c7b Pulse Link: https://otx.alienvault.com/pulse/6aa8f7aa51de0401ca420c7b Pulse Author: Tr1sa111 Created: 2026-09-15 07:45:46 Be advised,
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