CVE-2026-56207

EUVD-2026-74797
Signature of Bearer token is not verified in last step of SAML2 authentication for Impala's hs2-http interface, allowing altering user name and acting as another user.



This issue affects Apache Impala: >=4.0.0.



Users are recommended to upgrade to version 4.5.2, which fixes this issue.
ProviderTypeBase ScoreAtk. VectorAtk. ComplexityPriv. RequiredVector
NISTPrimary
9.8 CRITICAL
NETWORK
LOW
NONE
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Base Score
CVSS 3.x
EPSS Score
Percentile: 39.36%
Affected Products (NVD)
VendorProductVersion
apacheimpala
4.0.0 ≤
𝑥
< 4.5.2
𝑥
= Vulnerable software versions
Common Weakness Enumeration
References
https://lists.apache.org/thread/20cov78py0zqzx7dyq39ktythkwn91zs
http://www.openwall.com/lists/oss-security/2026/09/08/22