EUVD-2026-74797
GHSA-3mmv-f538-2fpw
Severity by source
AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Once SAML2 on hs2-http is enabled, a remote unauthenticated attacker forges any identity trivially (AC:L, PR:N); impersonating a privileged user yields full C/I/A impact.
Primary rating from Vendor (CNA).
CVSS VectorVendor
Lifecycle Timeline
5Description PRE-NVD
Articles & Coverage 1
AnalysisAI
User impersonation in Apache Impala 4.0.0 through 4.5.1 lets a remote attacker act as any user because the final step of SAML2 authentication on the hs2-http interface never verifies the Bearer token's signature. An attacker who can reach a SAML2-enabled hs2-http endpoint can forge or tamper with the token's asserted username and gain that user's identity and privileges. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Requires the target Apache Impala (4.0.0-4.5.1) to have SAML2 authentication enabled on the hs2-http (HiveServer2 over HTTP) interface - this is the specific feature that carries the unverified Bearer token step and is not enabled by default. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The CVSS 3.1 base score is 9.8 (AV:N/AC:L/PR:N/UI:N/C:H/I:H/A:H), reflecting a trivially exploitable, network-reachable authentication bypass once the vulnerable path is used. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in. |
| Exploit Scenario | Full exploit scenario with step-by-step reproduction available after sign-in. |
| Remediation | Vendor-released patch: upgrade Apache Impala to version 4.5.2, which fixes the signature-verification flaw. … Detailed patch versions, workarounds, and compensating controls in full report. |
Recommended ActionAI
Within 24 hours: Identify all Apache Impala deployments running versions 4.0.0-4.5.1 with SAML2 authentication enabled on hs2-http interfaces; assess which systems contain sensitive data and document network exposure. …
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