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Nebula Security
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Nebula Security
@nebusecurity
Secure the planet | YC S26
nebusec.ai
Joined February 2026
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  • user avatar
    Nebula Security
    @nebusecurity
    Jul 23
    When the attackers have AI, how do you prevent the next HuggingFace incident from happening to your product? Today, we launch VEGA with @ycombinator , a beyond Mythos level cybersecurity agent that finds critical vulnerabilities before your product ships. VEGA reviews your
    00:00
    32K
  • user avatar
    Nebula Security
    @nebusecurity
    Jul 20
    Nebula Security at Linux netdev conference, showing how we use VEGA to find 600+ vulnerabilities in one scan and sent 100+ patches. We solely became the top 3 biggest patch provider in two months straight
    user avatar
    netdevconf
    @netdev01
    Jul 18
    New Age Tooling BoF @netdev01 netdevconf.info/0x1A/sessions/… #netdevconf
    8.8K
  • user avatar
    Nebula Security
    @nebusecurity
    Jul 15
    Congrats to the OtterSec team on releasing rCTF v2! Nebula Security was glad to support the security review before release. We hope platforms like rCTF keep exploring more thoughtful features that help organizers keep CTFs interesting, creative, and meaningful in the age of AI
    user avatar
    es3n1n
    OtterSec
    @es3n1n
    Jul 14
    Today, we’re releasing rCTF v2, an open-source platform for hosting cybersecurity capture-the-flag competitions.
    The signature rCTF wordmark, white on black with red accenting. A red stylized “v2” sits slanted on the bottom-right side.
    A screenshot of rCTF's matrix-style leaderboard displays teams as rows, challenges as columns, and their intersection as the team's solve status on that challenge.

Each team has a custom avatars, country flag, and tagline. A sparkline shows the team's scoring activity.

The top-left corner of the leaderboard displays a line chart, plotting the visible teams against each other.
    A screenshot of the rCTF's challenge listing. It is panel-style; the left side displays all challenges within the event, while the right side displays the details of a particular selected challenge (the challenge's description, attachments, and any custom instancing).
    The platform's admin view allows for viewing and auditing of the submission logs from all teams. A complex filtering system allows filtering against (non-exhaustively) challenge names, submission results, and time intervals.
    5.9K
  • user avatar
    Nebula Security
    @nebusecurity
    Jul 12
    We won kernelCTF again with a new 0-day vulnerability and eligible for another $100k bounty
    49K
  • user avatar
    Nebula Security
    @nebusecurity
    Jul 10
    Try a live IonStack root on your Pixel 10: rootme.nebusec.io In the IonStack demo, we left the rootme URL visible and put up a giant countdown as a tribute to jailbreakme.
    9.5K