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Fencer Intel
high 8.8

CVE-2026-41053 json

Over-inclusive team membership expansion in GitHub App authentication provider for Rancher

published 4mo ago modified 15d ago also GHSA-4j6x-2764-m8gh , GO-2026-5869 , EUVD-2026-40297

cvss
8.8
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 44%
public exploits
0
none known

Summary

Incorrect authentication caching in the team member ship expansion of the Rancher Github authentication provider caused it granting principal access to any logged in user, in 2.13 before 2.13.6 and 2.14 before 2.14.2.

Patch / fix

  • go github.com/rancher/rancher 0.0.0-20260519172014-d0c047bbc6d2, 2.13.6, 2.14.2
  • SUSE Rancher 2.13.6, 2.14.2
  • govulncheck-vulndb openSUSE Leap 16.0 0.0.20260723T184607-160000.1.1

opensuse advisories openSUSE-SU-2026:21483-1

Is CVE-2026-41053 in your dependencies? Fencer shows which of your repositories are affected as soon as an advisory lands, and opens the fix as a pull request.

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CISA SSVC

Exploitation
none
Automatable
no
Technical impact
total
Assessed
4mo ago

Exploit prediction

0.52% chance of exploitation in the next 30 days, higher than 44% of all scored CVEs (FIRST EPSS, 2026-11-09).

CVSS scores

assigned by version score vector
CNA 3.1 8.8 CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
GitHub 3.1 8.8 CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Affected packages

ecosystem package affected fixed in
go github.com/rancher/rancher
>=2.14.0, <2.14.2
>=2.13.0, <2.13.6
<0.0.0-20260519172014-d0c047bbc6d2
2.14.2
2.13.6
0.0.0-20260519172014-d0c047bbc6d2

Affected products

  • SUSE Rancher

Classification

Weakness
  • CWE-303 Incorrect Implementation of Authentication Algorithm

References

Sources

Fencer Intel 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.