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CVE-2026-44949Unauthenticated namespace creation and RBAC injection via rancher-webhook FleetWorkspace mutating webhook

Description

A Rancher FleetWorkspace admission path allowed side effects to occur in the Rancher webhook handler for versions 0.7.0 up to 0.7.10, 0.8.0 up to 0.8.7, 0.9.0 up to 0.9.6 and 0.10.0 up to 0.10.7. An unauthenticated attacker with network access to the in-cluster rancher-webhook service could submit a crafted admission payload and cause workspace-related Kubernetes objects to be created with attacker-chosen identity data.

Timeline

  1. ID reserved

    By suse

  2. · 53 days later

    Published

Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.

Scores

CVSS scores of CVE-2026-44949, by who scored it
Scored byCVSSScoreVector
suseCNA (assigner)4.0High7.0CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:N/VI:H/VA:N/SC:N/SI:H/SA:N
NVDNVD · Undergoing Analysis4.0High7.0CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:N/VI:H/VA:N/SC:N/SI:H/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
EPSS (exploitation in 30 days)
0.39% · top 66% of all CVEs (14 Nov 2026)
CISA SSVC
Exploitation: none · Automatable: no · Technical impact: partial
Loading the EPSS history…

The list uses the assigner's score when there is one, then CISA's, then NVD's: High 7.0.

Affected products

  • SUSE · Rancher

    • affected 0.7.0 – < 0.7.10
    • affected 0.8.0 – < 0.8.7
    • affected 0.9.0 – < 0.9.6
    • affected 0.10.0 – < 0.10.7

References

References1

Sources

The same CVE in the primary databases and aggregators, to check against.

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Record last updated .