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CVE-2023-48298

22
FAUCET Score

CVE-2023-48298 is an integer underflow vulnerability in ClickHouse, an open-source column-oriented database, specifically affecting the decompression of the FPC codec. This flaw can lead to a stack buffer overflow, causing a denial of service (crash) in affected ClickHouse and ClickHouse Cloud products. With a CVSS score of 7.5 (HIGH), it can be exploited by an unauthenticated attacker over the network with low attack complexity, resulting in high availability impact. There is currently no evidence of active exploitation, public exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion surrounding this vulnerability.

Impacted Technologies

VendorProductVersion(s)CPE
>= 23.3, <= 23.3.17.13CPE matchmatch criteria
cpe:2.3:a:clickhouse:clickhouse:*:*:*:*:*:*:*:*
>= 23.8, <= 23.8.7.24CPE matchmatch criteria
cpe:2.3:a:clickhouse:clickhouse:*:*:*:*:*:*:*:*
>= 23.9, <= 23.9.5.29CPE matchmatch criteria
cpe:2.3:a:clickhouse:clickhouse:*:*:*:*:*:*:*:*
>= 23.10, <= 23.10.4.25CPE matchmatch criteria
cpe:2.3:a:clickhouse:clickhouse:*:*:*:*:*:*:*:*
>= 23.9, <= 23.9.2.47475CPE matchmatch criteria
cpe:2.3:a:clickhouse:clickhouse_cloud:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

5.9MEDIUM

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H

Attack Vector
NETWORK
Attack Complexity
HIGH
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
HIGH
Exploitability Score
2.2
Impact Score
3.6
CvssVersion
3.1

Exploit Intelligence

EPSS Score
0.63%
Probability of exploitation in next 30 days
EPSS Percentile
46.7%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0063 is in the 23rd percentile among its peer group of 51,551 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.1 Mastodon, and 0.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (1)

github_advisorypatch availablevia nvd_reference
View patch

References

github.com / ClickHouse/ClickHouse/pull/56795
Patch
github.com / ClickHouse/ClickHouse/security/advisories/GHSA-qw9f-qv29-8938
Vendor Advisory