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CVE-2026-44937 SUSE CVE debrief

CVE-2026-44937 involves potential forgery of webhook requests in SUSE Rancher Fleet. The vulnerability affects versions 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. Remote attackers could exploit this to cause a denial of service or a downgrade attack on other repositories on the system. This is a high-severity vulnerability with a CVSS score of 8.3. Users of affected versions should take immediate action to mitigate the risk.

Vendor
SUSE
Product
Rancher
CVSS
HIGH 8.3
CISA KEV
Not listed in stored evidence
Original CVE published
2026-07-06
Original CVE updated
2026-07-09
Advisory published
2026-07-06
Advisory updated
2026-07-09

Who should care

Users of SUSE Rancher Fleet versions 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 should be aware of this vulnerability and take necessary actions to mitigate the risk. This includes assessing deployments for exposure, applying patches or updates, and implementing additional monitoring and logging.

Technical summary

The vulnerability arises from the potential forgery of webhook requests when using an unauthenticated webhook in SUSE Rancher Fleet. This could allow remote attackers to cause a denial of service or a downgrade attack on other repositories on the system. The CVSS score for this vulnerability is 8.3, indicating a high severity level. Affected users should assess their deployments and apply necessary patches or updates.

Defensive priority

High

Recommended defensive actions

  • Inventory and assess SUSE Rancher Fleet versions 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 for exposure.
  • Apply patches or updates to SUSE Rancher Fleet to versions 0.15.2, 0.14.6, 0.13.11, or 0.12.5, or later.
  • Implement additional monitoring and logging to detect potential webhook request forgery attempts.
  • Review and update security configurations for SUSE Rancher Fleet to ensure that webhooks are properly authenticated.
  • Confirm whether affected product deployments exist in managed environments and assign an owner for follow-up.
  • Review compensating controls for exposed systems while remediation is scheduled and verified.
  • Track exceptions, retest remediated assets, and close the item only after evidence is documented.

Evidence notes

The CVE record was published on 2026-07-06T11:16:27.727Z and was last modified on 2026-07-09T20:24:49.943Z. The NVD entry is currently Analyzed. This vulnerability affects SUSE Rancher Fleet versions 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. The CVSS score for this vulnerability is 8.3, indicating a high severity level. Users should verify their deployments and assess exposure.

Sources and references

Verified primary and authoritative sources

  • CVE-2026-44937 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2026-44937

    CVE Program - Official CVE Program record with source-provided CVE metadata.

  • CVE-2026-44937 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2026-44937

    NIST National Vulnerability Database - Official NIST NVD detail page and source-specific vulnerability assessment.

Supplemental references

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.