How severe is CVE-2024-10553?

CVE-2024-10553 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-2024-10553 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (70th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2024-10553?

CVE-2024-10553 affects H2o. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2024-10553?

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.

Does CVE-2024-10553 have an EU (EUVD) identifier?

Yes. CVE-2024-10553 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-7107.

When was CVE-2024-10553 published?

CVE-2024-10553 was published on 2025-03-20 and last updated on 2026-06-17.

CVE-2024-10553

CVE-2024-10553 is a critical-severity vulnerability in H2o 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-502.

Key facts

Severity: Critical (CVSS 3.x base score 9.8)
EPSS exploit prediction: 1% (70th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2025-7107
Weakness: CWE-502
Affected product: H2o
Published: 2025-03-20
Last modified: 2026-06-17

Description

A vulnerability in the h2oai/h2o-3 REST API versions 3.46.0.4 allows unauthenticated remote attackers to execute arbitrary code via deserialization of untrusted data. The vulnerability exists in the endpoints POST /99/ImportSQLTable and POST /3/SaveToHiveTable, where user-controlled JDBC URLs are passed to DriverManager.getConnection, leading to deserialization if a MySQL or PostgreSQL driver is available in the classpath. This issue is fixed in version 3.47.0.

Frequently asked questions

What is CVE-2024-10553?: A vulnerability in the h2oai/h2o-3 REST API versions 3.46.0.4 allows unauthenticated remote attackers to execute arbitrary code via deserialization of untrusted data. The vulnerability exists in the endpoints POST /99/ImportSQLTable and POST /3/SaveToHiveTable, where user-controlled JDBC URLs are passed to DriverManager.getConnection, leading to deserialization if a MySQL or PostgreSQL driver is available in the classpath. This issue is fixed in version 3.47.0.
How severe is CVE-2024-10553?: CVE-2024-10553 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-2024-10553 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (70th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2024-10553?: CVE-2024-10553 affects H2o. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2024-10553?: 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.
Does CVE-2024-10553 have an EU (EUVD) identifier?: Yes. CVE-2024-10553 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-7107.
When was CVE-2024-10553 published?: CVE-2024-10553 was published on 2025-03-20 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:h2o:h2o:3.46.0.4:*:*:*:*:*:*:*

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CVE-2026-3960 — Critical (CVSS 9.8): A critical remote code execution vulnerability exists in the unauthenticated REST API endpoint /99/ImportSQLTable in…
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