#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.

hashtag.org network · sponsored

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.

$2,449.80/ year · 4-character #name
Claim #0day — $2,449.80/yr→Buy on hashtag.space (web3)
card via hashtag.org · tokens via hashtag.space
9
Uses / 7 days
Mastodon
6
Accounts / 7 days
Mastodon
40
Recent posts
Mastodon
~0.1/hr
Recent pace
Mastodon · last 40
0.2
Avg reactions / post
Mastodon · last 40
—
Reddit posts / month
Reddit search
—
Open-web mentions
hashtag.org Firehose

Day-by-day usage

measured · mastodon.social (Mastodon public tags API) · fetched 2026-11-01 06:32 UTC
0
10-26
3
10-27
2
10-28
0
10-29
0
10-30
3
10-31
1
11-01

9 uses by 6 unique accounts across the window. Real per-day counts, not estimates. Newest bar is today so far.

Related hashtags

measured · mastodon.social (Mastodon public search API) · fetched 2026-11-01 06:32 UTC
#0dayz
0 uses · 0 accounts / 7d
#0day_exploit
1 uses · 1 accounts / 7d
#0daybeats
0 uses · 0 accounts / 7d
#0days
0 uses · 0 accounts / 7d
#0dayexploit
0 uses · 0 accounts / 7d
#0dayvirtualbox
0 uses · 0 accounts / 7d
#0dayaffects
0 uses · 0 accounts / 7d
#0dayescrowrettetjobs
0 uses · 0 accounts / 7d
#0daytody
0 uses · 0 accounts / 7d
#0DaysToOffload
0 uses · 0 accounts / 7d
#0DayPowered
0 uses · 0 accounts / 7d
#0day4free
0 uses · 0 accounts / 7d

Live pulse

measured · mastodon.social (Mastodon tag timeline) · fetched 2026-11-01 06:32 UTC

Everything below is measured over the latest 40 public posts (spanning ~723 hours).

Posting hours (UTC) — busiest: 07:00

00:0012:0023:00

Languages: English (33) · Danish (3) · Russian (1) · German (1) · French (1) · Polish (1)

Avg boosts / post: 1

Top of the latest posts

  • 🔆We've published a detailed mitigation script for the #PHP @php_net #0day exploits on Debian / Ubuntu / Trisquel for the public good. Sharing is caring! 💞 https://codeberg.org/PrivacySafe/security-patches/

    PrivacySafe@[email protected]♥ 3↻ 42026-10-21 13:29 UTCView post →

  • Bruce Schneier - fra EncryptFest 2026 Hvis NSA ønskede at komme ind - ville de være det ... ville droppe en #0day ... ville udnytte en sårbarhed ... malware i min telefon og aflytte Det faktum, at de ikke er det, er baseret på 1 af 2 ting:

    #cryptohagen@[email protected]♥ 2↻ 12026-10-31 07:59 UTCView post →

  • Kritisches PHP-Sicherheitsproblem: Websites offline Sogar das BSI hat schon eine dringende Warnung veröffentlicht. Etwas hilfreicher ist der Text von Brian Krebs. Die besten und vor allem aktuellen Informationen gibt es beim SANS-ISC. Beim

    Christoph Schmees@[email protected]♥ 1↻ 12026-10-21 17:00 UTCView post →

What “0day” means

Wiktionary · Wikipedia

day/deɪ/

  • nounAny period of 24 hours.
  • verbTo spend a day (in a place).
Full entry on Wiktionary →

A 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 surface

Follow #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.

X (Twitter) ↗Instagram ↗TikTok ↗Facebook ↗LinkedIn ↗YouTube ↗Threads ↗Bluesky ↗Mastodon ↗Reddit ↗Pinterest ↗Tumblr ↗

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