Description
Fossil 2.18 on Windows allows attackers to cause a denial of service (daemon crash) via an XSS payload in a ticket. This occurs because the ticket data is stored in a temporary file, and the product does not properly handle the absence of this file after Windows Defender has flagged it as malware.
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 26.10 | fossil | No fix yet | — |
| Ubuntu 26.04 LTS | fossil | No fix yet | — |
| Ubuntu 25.10 | fossil | No fix yet | — |
| Ubuntu 24.04 LTS | fossil | No fix yet | — |
| Ubuntu 22.04 LTS | fossil | No fix yet | — |
Show 3 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 20.04 LTS | fossil | No fix yet | — |
| Ubuntu Pro 18.04 LTS | fossil | No fix yet | — |
| Ubuntu Pro 16.04 LTS | fossil | No fix yet | — |