How severe is CVE-2026-56207?

CVE-2026-56207 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2026-56207 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (38th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-56207?

CVE-2026-56207 affects Apache Impala. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-56207?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.

When was CVE-2026-56207 published?

CVE-2026-56207 was published on 2026-09-09 and last updated on 2026-09-10.

CVE-2026-56207

CVE-2026-56207 is a critical-severity vulnerability in Apache Impala with a CVSS 3.x base score of 9.8. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-347.

Key facts

Severity: Critical (CVSS 3.x base score 9.8)
EPSS exploit prediction: 0% (38th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-347
Affected product: Apache Impala
Published: 2026-09-09
Last modified: 2026-09-10

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.

Frequently asked questions

What is CVE-2026-56207?: 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.
How severe is CVE-2026-56207?: CVE-2026-56207 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2026-56207 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (38th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-56207?: CVE-2026-56207 affects Apache Impala. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-56207?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
When was CVE-2026-56207 published?: CVE-2026-56207 was published on 2026-09-09 and last updated on 2026-09-10.

References

Affected products (1)

cpe:2.3:a:apache:impala:*:*:*:*:*:*:*:*

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