Vulnerability · Published Jul 6, 2026 · Assigned by suse
CVE-2026-44937SUSE Rancher Fleet had an Unauthenticated Webhook: Regex Injection via Unsanitized Repository URL Components
High 8.3
In plain English
A high-severity server-side request forgery in Rancher from SUSE. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.4% (higher than 37% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Official description
Potential forgery of webhook requests when using a unauthenticated webhook in SUSE Rancher Fleet 0.15 before 0.15.2, 0.14 before 0.14.6, 0.13 before 0.13.11 and 0.12 before 0.12.5 could be used by remote attackers to cause a denial of service or a downgrade attack on other repositories on the system.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Go | github.com/rancher/fleet | 0.15.2 | GHSA-jmf4-m7j9-g72r |
| Go | github.com/rancher/fleet | 0.14.6 | GHSA-jmf4-m7j9-g72r |
| Go | github.com/rancher/fleet | 0.13.11 | GHSA-jmf4-m7j9-g72r |
| Go | github.com/rancher/fleet | 0.12.15 | GHSA-jmf4-m7j9-g72r |
| Go | github.com/rancher/fleet | 0.12.15, 0.13.11, 0.14.6, 0.15.2 | GO-2026-5874 |
Affected products (as reported)
Weakness: CWE-918 · Vector: CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:N/VI:L/VA:H/SC:N/SI:N/SA:N