Improper Verification of Cryptographic Signature in Apache Impala - CVE-2026-56207
Published: September 10, 2026
Vulnerability identifier: #VU148863
CSH Severity: Medium
CVSS v4: 8.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-56207
CWE-ID: CWE-347
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to impersonate another user.
The vulnerability exists due to improper verification of cryptographic signatures in the hs2-http interface during the final step of SAML2 authentication when processing bearer tokens. A remote attacker can submit a forged bearer token with an altered user name to impersonate another user.
Affected software
Apache Impala
How to mitigate CVE-2026-56207
Install security update from vendor's website.
Apache Impala - update to 4.5.2