CVE-2026-44937: rancher fleet SSRF — Fix

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.

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CVSS v3.1 Score

8.2

HIGH

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:H

EPSS — Exploit Prediction

0.0038

Probability of exploitation

0.31%

Percentile rank

EPSS estimates the probability that this vulnerability will be exploited in the wild within the next 30 days. A higher score means more likely to be exploited.

Weakness Type (CWE)

CWE-918 Server-Side Request Forgery (SSRF)

Affected Products

Vendor	Product	Versions
suse	rancher_fleet	0.12.0 — 0.12.15
suse	rancher_fleet	0.13.0 — 0.13.11
suse	rancher_fleet	0.14.0 — 0.14.6
suse	rancher_fleet	0.15.0 — 0.15.2

References

Advisories & Patches

https://github.com/rancher/fleet/security/advisories/GHSA-jmf4-m7j9-g72r

Frequently Asked Questions

What is CVE-2026-44937? +

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. It has a CVSS v3.1 base score of 8.2 (HIGH).

How severe is CVE-2026-44937? +

CVE-2026-44937 has a CVSS v3.1 score of 8.2 out of 10, rated HIGH. This is a high-severity vulnerability that should be prioritized for patching. The EPSS score is 0.0038, placing it in the 0th percentile for exploitation probability.

What products are affected by CVE-2026-44937? +

CVE-2026-44937 affects products from suse, specifically: rancher_fleet. Check the affected products table above for specific version ranges.

How do I check if I'm vulnerable to CVE-2026-44937? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

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