How severe is CVE-2023-48704?

CVE-2023-48704 has a CVSS 3.x base score of 7.0, rated high severity. It is exploitable over network with high attack complexity, requires no privileges and no user interaction. Impact on confidentiality is low, integrity low, and availability high.

Is CVE-2023-48704 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (39th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2023-48704?

CVE-2023-48704 primarily affects Clickhouse. In total, 2 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2023-48704?

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

When was CVE-2023-48704 published?

CVE-2023-48704 was published on 2023-12-22 and last updated on 2026-06-17.

CVE-2023-48704

CVE-2023-48704 is a high-severity vulnerability in Clickhouse with a CVSS 3.x base score of 7.0. 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-787.

Key facts

Severity: High (CVSS 3.x base score 7.0)
EPSS exploit prediction: 0% (39th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-787
Affected product: Clickhouse
Published: 2023-12-22
Last modified: 2026-06-17

Description

ClickHouse is an open-source column-oriented database management system that allows generating analytical data reports in real-time. A heap buffer overflow issue was discovered in ClickHouse server. An attacker could send a specially crafted payload to the native interface exposed by default on port 9000/tcp, triggering a bug in the decompression logic of Gorilla codec that crashes the ClickHouse server process. This attack does not require authentication. This issue has been addressed in ClickHouse Cloud version 23.9.2.47551 and ClickHouse versions 23.10.5.20, 23.3.18.15, 23.8.8.20, and 23.9.6.20.

Frequently asked questions

What is CVE-2023-48704?: ClickHouse is an open-source column-oriented database management system that allows generating analytical data reports in real-time. A heap buffer overflow issue was discovered in ClickHouse server. An attacker could send a specially crafted payload to the native interface exposed by default on port 9000/tcp, triggering a bug in the decompression logic of Gorilla codec that crashes the ClickHouse server process. This attack does not require authentication. This issue has been addressed in ClickHouse Cloud version 23.9.2.47551 and ClickHouse versions 23.10.5.20, 23.3.18.15, 23.8.8.20, and 23.9.6.20.
How severe is CVE-2023-48704?: CVE-2023-48704 has a CVSS 3.x base score of 7.0, rated high severity. It is exploitable over network with high attack complexity, requires no privileges and no user interaction. Impact on confidentiality is low, integrity low, and availability high.
Is CVE-2023-48704 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (39th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2023-48704?: CVE-2023-48704 primarily affects Clickhouse. In total, 2 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2023-48704?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
When was CVE-2023-48704 published?: CVE-2023-48704 was published on 2023-12-22 and last updated on 2026-06-17.

References

Affected products (2)

cpe:2.3:a:clickhouse:clickhouse:*:*:*:*:*:*:*:*
cpe:2.3:a:clickhouse:clickhouse_cloud:*:*:*:*:*:*:*:*

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CVE-2019-16535 — Critical (CVSS 9.8): In all versions of ClickHouse before 19.14, an OOB read, OOB write and integer underflow in decompression algorithms…
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CVE-2018-14670 — Critical (CVSS 9.8): Incorrect configuration in deb package in ClickHouse before 1.1.54131 could lead to unauthorized use of the database.
CVE-2019-16536 — High (CVSS 8.8): Stack overflow leading to DoS can be triggered by a malicious authenticated client in Clickhouse before 19.14.3.3.
CVE-2021-43305 — High (CVSS 8.8): Heap buffer overflow in Clickhouse's LZ4 compression codec when parsing a malicious query. There is no verification…
CVE-2021-43304 — High (CVSS 8.8): Heap buffer overflow in Clickhouse's LZ4 compression codec when parsing a malicious query. There is no verification…

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