by Kastro
Paper/Archive/CVE-2026-56207

CVE-2026-56207

Apache Software Foundation Apache Impala — Apache Impala: SAML authentication bypass via forged bearer token

EPSS 0.5%CVSS 9.8
critical.is priorityof 100
38
CVSS 9.8 (ADP)9.8 / 10 × 3029.4Not in CISA KEV+300.0EPSS percentile 40.3.403 × 208.1No public exploit+100.0SSVC exploitation: none+100.0
Description · from the CVE record

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.

Affected

ProductAffectedFixed inSource
Apache Impala4.0.0 – 4.5.1–CNA

Scores by source

CISA ADP9.8CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CISA ADPSSVCExploitation: none · Automatable: yes · Technical impact: total

References

advisorylists.apache.org/thread/20cov78py0zqzx7dyq39ktythkwn91zsrefopenwall.com/lists/oss-security/2026/09/08/22