8.8

CVE-2026-41053: Over-inclusive team membership expansion in GitHub App authentication provider for Rancher

Analyzed
AliasesGHSA-4j6x-2764-m8ghGO-2026-5869CGA-2m36-wpw2-6h98
Published 30-06-2026Last modified 01-07-2026

Vulnerability summary

CVE-2026-41053 is a high (CVSS 8.8) vulnerability in suse rancher. EPSS estimates a 0.52% chance of exploitation in the next 30 days, higher than 43.5% of scored vulnerabilities.

Overall risk
35/100
0100
Medium · default modelHow is this calculated?
CVSS score
8.8/10
010
High · v3.1 (CVE.org)
EPSS score
0.52%
0%100%
Low · 0.00 pp in 30 days
KEVNot listedNot listed by any tracked catalog.
RansomwareNot flaggedNo ransomware use recorded.
Public exploits0No public exploits recorded

Advisory lineage

Upstream 0 · Downstream 1 · Related 2
OPENSUSE-SU-2026:21483-1CGA-8G2V-PCV4-QW84

Timeline

  1. 30-06-2026
    PublishedVulnerability first disclosed.
  2. 01-07-2026
    Last modifiedVulnerability information updated.

Description

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.

CVSS metrics

4 scores · 4 sources · 1 version

EPSS trend

Probability

0.52%

Chance of exploitation in the next 30 days

Percentile

44%

Versus all other CVEs

30-day change

No change 0.00 pp

From 0.52% on 22-09-2026

22-09-202622-10-2026

Known exploited

Compare KEV catalogs
CISA KEV

Not in the CISA KEV catalog.

ENISA CNW

Not in the ENISA CNW catalog.

CIRCL

Not in the CIRCL catalog.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Chainguard4 products
  • harvester< 1.8.1-r32
  • harvester-fips< 1.8.1-r29
  • harvester-fips-webhook< 1.8.1-r28
  • harvester-webhook< 1.8.1-r32
Github.com/rancher1 product
  • rancher≥ 2.14.0, < 2.14.2 | ≥ 2.13.0, < 2.13.6 | < 0.0.0-20260519172014-d0c047bbc6d2
Suse1 product
  • rancher≥ 2.13.0, < 2.13.6 | ≥ 2.14.0, < 2.14.2

3 vendors · 6 products

References

9 links