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CVE-2026-75034— Rancher: SAML Assertion Replay

Quick assessment

Affected
SUSE Rancher
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

SUSE rancher是德国SUSE公司开源的一款一套容器管理平台。 SUSE rancher 2.15.1之前版本存在授权问题漏洞，该漏洞源于SAML断言重放保护使用每进程缓存记录已消费的断言ID，导致每个副本只能检测到同一pod内的重放，可能允许攻击者在高可用部署中向其他副本重放捕获的断言，获取额外经过身份验证的会话。

CVSS 7.4 · High EPSS 0.32% · P25

Possible ATT&CK Techniques 1 AI

T1531 · Account Access Removal

Affected Version Matrix 1

VendorProduct Version RangeStatus
SUSE Rancher < 2.15.1 affected
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I. Basic Information for CVE-2026-75034

Vulnerability Information
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Vulnerability Title
Rancher: SAML Assertion Replay
Source: CVE Program / CVE List V5
Vulnerability Description
A flaw was found in Rancher Manager. The SAML assertion replay protection introduced by the fix for CVE-2026-44946 recorded consumed assertion IDs in a per-process cache, so each replica only detected replays that reached the same pod. In a high-availability deployment, an attacker holding a captured assertion could replay it once against every other replica to obtain additional authenticated sessions as the victim. This issue affects Rancher: before 2.15.1.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
使用捕获-重放进行的认证绕过
Source: CVE Program / CVE List V5
Vulnerability Title
SUSE rancher 授权问题漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
SUSE rancher是德国SUSE公司开源的一款一套容器管理平台。 SUSE rancher 2.15.1之前版本存在授权问题漏洞，该漏洞源于SAML断言重放保护使用每进程缓存记录已消费的断言ID，导致每个副本只能检测到同一pod内的重放，可能允许攻击者在高可用部署中向其他副本重放捕获的断言，获取额外经过身份验证的会话。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
SUSE Rancher 0 ~ 2.15.1 -

II. Public POCs for CVE-2026-75034

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III. Intelligence Information for CVE-2026-75034

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Vendor Pages for CVE-2026-75034 (1)

Same Patch Batch · SUSE · 2026-09-03 · 6 CVEs total

CVE-2026-71404 8.7 HIGH Rancher: Ownership-less ClusterRole overwrite via attacker-controlled cr-name annotation o
CVE-2026-75033 7.7 HIGH Rancher: Cross-Cluster Secret Leakage via Namespace projectId Annotation Spoofing
CVE-2026-75035 7.7 HIGH Rancher: ext.cattle.io/v1 Token store: cross-user token disclosure via label-selector scop
CVE-2026-71403 6.1 MEDIUM Rancher: Identity-field mutation in /v3/users allows account hijack via principal rebind
CVE-2026-75036 5.3 MEDIUM Fleet: DNS exfiltration via Sprig getHostByName in fleet.yaml Helm template preprocessing

IV. Related Vulnerabilities

Same product: Rancher
Same vendor: SUSE
Same weakness: CWE-294