High severity · published Jul 6, 2026
CVE-2026-44937
SUSE Rancher Fleet had an Unauthenticated Webhook: Regex Injection via Unsanitized Repository URL Components
8.2
CVSS
0.4%
EPSS
No
On KEV
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.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:H
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
None
Integrity
Low
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.4% · higher than 36% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
RA
Rancher · SUSE
0.15.0 before 0.15.2; 0.14.0 before 0.14.6; 0.13.0 before 0.13.11; 0.12.0 before 0.12.15 · source: vendor
RF
Rancher Fleet · Suse
0.12.0 before 0.12.15; 0.13.0 before 0.13.11; 0.14.0 before 0.14.6; 0.15.0 before 0.15.2 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-44937
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-44937
Mitigation
https://github.com/rancher/fleet/security/advisories/GHSA-jmf4-m7j9-g72r
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