How severe is CVE-2023-43642?

CVE-2023-43642 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.

Is CVE-2023-43642 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (60th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2023-43642?

CVE-2023-43642 affects Xerial Snappy-java. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2023-43642?

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-2023-43642 published?

CVE-2023-43642 was published on 2023-09-25 and last updated on 2026-06-17.

CVE-2023-43642

CVE-2023-43642 is a high-severity vulnerability in Xerial Snappy-java with a CVSS 3.x base score of 7.5. 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-770.

Key facts

Severity: High (CVSS 3.x base score 7.5)
EPSS exploit prediction: 1% (60th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-770
Affected product: Xerial Snappy-java
Published: 2023-09-25
Last modified: 2026-06-17

Description

snappy-java is a Java port of the snappy, a fast C++ compresser/decompresser developed by Google. The SnappyInputStream was found to be vulnerable to Denial of Service (DoS) attacks when decompressing data with a too large chunk size. Due to missing upper bound check on chunk length, an unrecoverable fatal error can occur. All versions of snappy-java including the latest released version 1.1.10.3 are vulnerable to this issue. A fix has been introduced in commit `9f8c3cf74` which will be included in the 1.1.10.4 release. Users are advised to upgrade. Users unable to upgrade should only accept compressed data from trusted sources.

Frequently asked questions

What is CVE-2023-43642?: snappy-java is a Java port of the snappy, a fast C++ compresser/decompresser developed by Google. The SnappyInputStream was found to be vulnerable to Denial of Service (DoS) attacks when decompressing data with a too large chunk size. Due to missing upper bound check on chunk length, an unrecoverable fatal error can occur. All versions of snappy-java including the latest released version 1.1.10.3 are vulnerable to this issue. A fix has been introduced in commit `9f8c3cf74` which will be included in the 1.1.10.4 release. Users are advised to upgrade. Users unable to upgrade should only accept compressed data from trusted sources.
How severe is CVE-2023-43642?: CVE-2023-43642 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.
Is CVE-2023-43642 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (60th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2023-43642?: CVE-2023-43642 affects Xerial Snappy-java. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2023-43642?: 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-2023-43642 published?: CVE-2023-43642 was published on 2023-09-25 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:xerial:snappy-java:*:*:*:*:*:*:*:*

More vulnerabilities in Xerial Snappy-java

CVE-2023-34455 — High (CVSS 7.5): snappy-java is a fast compressor/decompressor for Java. Due to use of an unchecked chunk length, an unrecoverable fatal…
CVE-2023-34454 — Medium (CVSS 5.9): snappy-java is a fast compressor/decompressor for Java. Due to unchecked multiplications, an integer overflow may occur…
CVE-2023-34453 — Medium (CVSS 5.9): snappy-java is a fast compressor/decompressor for Java. Due to unchecked multiplications, an integer overflow may occur…

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