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CVE-2026-56207

Apache Impala: SAML authentication bypass via forged bearer token

CRITICAL
9.8
CVSS Score
Published: September 9, 2026 at 10:36 AM UTC
Updated: September 10, 2026 at 09:08 PM UTC
1 product affected across 1 vendorImpala

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Severity
CRITICAL9.8
Exploit prediction
EPSS 0.5%
SSVC
No known exploit

Description

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

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Impala· Apache
95%
4.0.0 ≤ v ≤ 4.5.14.0.0
Affected range stops below 4.5.2, so it looks safe — our inference, not a vendor statement

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

Patch and advisory references

References (2)

Vendor AdvisoryMailing List
Source: cverecord
https://lists.apache.org/thread/20cov78py0zqzx7dyq39ktythkwn91zs
Mailing ListThird Party Advisory
Source: af854a3a-2127-422b-91ae-364da2661108
http://www.openwall.com/lists/oss-security/2026/09/08/22

SSVC — Action Prioritization

SSVCNo known exploitAutomatableTotal impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

9.8CRITICALCISA-ADP
Attack Vector
NETWORK
Complexity
LOW
Privileges
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
HIGH
Integrity
HIGH
Availability
HIGH
Vector?

Quick Info

StatusANALYZED
CWE
CWE-347

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