How severe is CVE-2023-4043?

CVE-2023-4043 has a CVSS 3.x base score of 5.9, rated medium severity. It is exploitable over network with high attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.

Is CVE-2023-4043 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (51st percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2023-4043?

CVE-2023-4043 affects Eclipse Parsson. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2023-4043?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-2023-4043 published?

CVE-2023-4043 was published on 2023-11-03 and last updated on 2026-06-17.

CVE-2023-4043

CVE-2023-4043 is a medium-severity vulnerability in Eclipse Parsson with a CVSS 3.x base score of 5.9. 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-834.

Key facts

Severity: Medium (CVSS 3.x base score 5.9)
EPSS exploit prediction: 1% (51st percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-834
Affected product: Eclipse Parsson
Published: 2023-11-03
Last modified: 2026-06-17

Description

In Eclipse Parsson before versions 1.1.4 and 1.0.5, Parsing JSON from untrusted sources can lead malicious actors to exploit the fact that the built-in support for parsing numbers with large scale in Java has a number of edge cases where the input text of a number can lead to much larger processing time than one would expect. To mitigate the risk, parsson put in place a size limit for the numbers as well as their scale.

Frequently asked questions

What is CVE-2023-4043?: In Eclipse Parsson before versions 1.1.4 and 1.0.5, Parsing JSON from untrusted sources can lead malicious actors to exploit the fact that the built-in support for parsing numbers with large scale in Java has a number of edge cases where the input text of a number can lead to much larger processing time than one would expect. To mitigate the risk, parsson put in place a size limit for the numbers as well as their scale.
How severe is CVE-2023-4043?: CVE-2023-4043 has a CVSS 3.x base score of 5.9, rated medium severity. It is exploitable over network with high attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.
Is CVE-2023-4043 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (51st percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2023-4043?: CVE-2023-4043 affects Eclipse Parsson. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2023-4043?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2023-4043 published?: CVE-2023-4043 was published on 2023-11-03 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:eclipse:parsson:*:*:*:*:*:*:*:*

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