CVE-2026-56207

9.8 criticalEPSS 0.5%

Critical (9.8) in apache impala. EPSS 0.5% chance of exploitation in the next 30 days.

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.

Severity

CVSS 3.1

9.8 critical

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

EPSS: 0.5% chance of exploitation in the next 30 days; higher than 40% of CVEs (scores of 2026-10-31)
CWE: CWE-347
Published: 2026-09-09
Modified: 2026-09-10
Record from: the NVD, synced 2026-10-19

Affected

apache:impala

References

https://lists.apache.org/thread/20cov78py0zqzx7dyq39ktythkwn91zs
http://www.openwall.com/lists/oss-security/2026/09/08/22

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