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Fencer Vulns
critical 9.9

CVE-2026-44935 json

Rancher Fleet vulnerable to cross namespace secret disclosure via unvalidated `valuesFrom` references in Helm Deployer

published 2026-07-01 4 mo ago modified 2026-10-25 14 d ago also GHSA-xr65-5cpm-g36x , GO-2026-5877 , EUVD-2026-41408

cvss
9.9
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.5%
EPSS 0.5% chance of exploitation in 30 days, percentile 42%
public exploits
0
none known

Summary

Missing validation of "valuesFrom" references in Helm Deployer of 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 0.12.15 could be used by owners of one tenant to access fleet credentials of other tenants.

Patch / fix

  • go github.com/rancher/fleet 0.12.15, 0.13.11, 0.14.6, 0.15.2
  • SUSE Rancher 0.12.15, 0.13.11, 0.14.6, 0.15.2
  • govulncheck-vulndb openSUSE Leap 16.0 0.0.20260723T184607-160000.1.1

opensuse advisories openSUSE-SU-2026:21483-1

CISA SSVC

Exploitation
none
Automatable
no
Technical impact
total
Assessed
4 mo ago

Exploit prediction

0.49% chance of exploitation in the next 30 days, higher than 42% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
CNA 3.1 9.9 CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
GitHub 3.1 9.9 CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H

Affected packages

ecosystem package affected fixed in
go github.com/rancher/fleet
>=0.15.0, <0.15.2
>=0.14.0, <0.14.6
>=0.13.0, <0.13.11
>=0.12.0, <0.12.15
0.15.2
0.14.6
0.13.11
0.12.15

Affected products

  • SUSE Rancher

Classification

Weakness
  • CWE-1287 Improper Validation of Specified Type of Input
  • CWE-863 Incorrect Authorization

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.