Adaptavist Group LTD Listed by thegentlemen Ransomware Group: Ransomware Claim — What’s Alleged & What To Do
Adaptavist Group LTD was listed by thegentlemen ransomware group on 8 April 2026, with internal files reported exfiltrated in the attack. An undisclosed number of people may be affected; anyone who has shared data with the company should review their records and monitor accounts for unusual activity.
On April 08, 2026, the Adaptavist Group LTD appeared on a listing associated with the ransomware group thegentlemen. Public information states that internal files were exfiltrated during a ransomware attack, though the number of people affected remains unknown and no independent confirmation of the listing’s claims has been reported.
The incident occurs against a backdrop of sustained ransomware activity aimed at technology and professional-services firms that hold customer records, source code, and contractual material. Such listings prompt organisations and individuals to assess whether their data may have been exposed, even when full details are not yet available.
Breaking down the breach
The only confirmed public detail is the listing itself and the statement that internal files were taken. No information has been released on the date of the intrusion, the method of initial access, the volume of data involved, or whether any material was subsequently published. The number of individuals potentially affected is recorded as unknown.
The group behind it: thegentlemen
Thegentlemen is a ransomware operator that maintains a leak site to list organisations it claims to have compromised. The group’s practice is to assert that data has been removed and may be released if ransom demands are not met. Its listing of Adaptavist Group LTD constitutes a claim by the group; no independent verification of the underlying events has been published in the available facts.
Adaptavist Group LTD and its sector
Adaptavist Group LTD is a British company that acts as a platinum partner for Atlassian and develops enterprise software, notably ScriptRunner for Jira, Confluence and Bitbucket. It supplies tools and services to large clients, including government bodies and major financial and technology organisations. Companies in this sector routinely process customer account data, licensing information, support records and proprietary code.
The information in question
The facts name only “internal files exfiltrated in ransomware attack.” No further breakdown of file types or data categories has been confirmed publicly. Organisations of this kind commonly hold customer contact details, contractual documents and source code, yet the precise contents of any exfiltrated material remain unconfirmed.
- Internal files were stated to have been taken.
- No verified inventory of specific data categories has been released.
- The number of individuals whose information may be involved is unknown.
The real-world impact
Where customer records or contractual material are involved, affected individuals may face risks of phishing, identity misuse or unsolicited contact. For the organisation, exposure of source code or internal systems can create longer-term security and competitive concerns. At present, the scale of any such impact cannot be quantified from the information released.
If your data was in this claimed breach
Monitor accounts for unusual activity and consider changing passwords for any services linked to Adaptavist or Atlassian products. Enable multi-factor authentication where available and review privacy settings on accounts that may contain related data. Readers can run a free exposure scan of their email address against known breach data sets to check for appearances in previously published records.
AICompiled with AI assistance from public sources and published under our editorial standards.
How this breach connects
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Publicly posted by thegentlemen — unverified claim, pending independent verification
Breach listings — particularly those originating from ransomware or leak sites — are third-party claims that may be unverified, incomplete, or inaccurate. A listing does not by itself confirm that a breach occurred or that any specific data was exposed. Severity is an automated assessment, not a definitive rating. Verification status is shown where available.
Attributions to threat groups and methods reflect public reporting and, in some cases, unverified claims made by the groups themselves; they may be incomplete or later revised. Recent Breaches and GalaxyWarden are independent and are not affiliated with, and do not endorse, any company or group named on this page. This information is aggregated from public sources for awareness only and is not legal, security, or investment advice.