CVE-2026-44946 PUBLISHED

SAML Authentication Replay in Rancher

Assigner: suse
Reserved: 08.05.2026 Published: 30.06.2026 Updated: 30.06.2026

A SAML authentication replay vulnerability in Rancher's Assertion Consumer Service (ACS) handler did not enforce one-time use of SAML assertion, potentially allowing person in the middle attacks against Rancher, affecting Rancher 2.14.0 before 2.14.3,

Metrics

CVSS 4.0

CVSS Vector: CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:H/VI:H/VA:N/SC:H/SI:H/SA:H
CVSS Score: 9.5

Exploitability Metrics		Vulnerable System Impact Metrics		Subsequent System Impact Metrics
Attack Vector	Network	Confidentiality	High	Confidentiality	High
Attack Complexity	High	Integrity	High	Integrity	High
Attack Requirements	Present	Availability	None	Availability	High
Privileges Required	None
User Interaction	None

CVSS 4.0

Product Status

Vendor	SUSE
Product	Rancher
Versions	Default: unaffected affected from 2.14.0 to 2.14.3 (excl.) affected from 2.13.0 to 2.13.7 (excl.) affected from 2.12.0 to 2.12.11 (excl.) affected from 2.11.0 to 2.11.15 (excl.)

Credits

Corban Villa corban.villa@berkeley.edu of a U.C. Berkeley security research project by: Austin Chu, Sohee Kim, and Corban Villa finder

References

https://github.com/rancher/rancher/security/advisories/GHSA-c5jm-xcmq-9j95

Problem Types

CWE-294 Authentication bypass by capture-replay CWE

Impacts

CAPEC-115 Authentication Bypass