CVE-2023-4043: Parsson DoS when parsing numbers from untrusted sources
Vulnerability summary
CVE-2023-4043 is a high (CVSS 7.5) Improper Input Validation vulnerability in eclipse foundation parsson. EPSS estimates a 0.76% chance of exploitation in the next 30 days, higher than 55.4% of scored vulnerabilities. 1 public exploit is recorded.
Not severe (CVSS 5.9, network access); no exploitation reported by the 5 checked sources
Source freshness unavailable
How is this decided?Advisory lineage
Upstream 0 · Downstream 2Timeline
- 03-11-2023PublishedVulnerability first disclosed.
- 05-09-2024Last modifiedVulnerability information updated.
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.
CVSS metrics
3 scores · 3 sources · 1 version- CVE.orgCNA5.9MediumCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:HDiffers
- OSV · MavenEcosystem advisory · calculated5.9MediumCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:HDiffers
EPSS trend
Probability
0.76%
Chance of exploitation in the next 30 days
Percentile
55%
Versus all other CVEs
30-day change
No change 0.00 pp
From 0.76% on 04-10-2026
Known exploited
Compare KEV catalogs
CISA KEVNot in the CISA KEV catalog.
ENISA CNWNot in the ENISA CNW catalog.
CIRCLNot in the CIRCL catalog.
Public exploits
1 foundExploit Reference (gitlab.eclipse.org)
Maturity: unknown
Weaknesses
CWE · root cause- CWE-20Improper Input ValidationThe product receives input or data, but it does not validate or incorrectly validates that the input has the properties that are required to process the data safely and correctly.
- CWE-834Excessive IterationThe product performs an iteration or loop without sufficiently limiting the number of times that the loop is executed.
Affected systems
Known conditions: network-reachable, no authentication, no user interaction (CVSS vector). Other conditions: not stated in public data.
Eclipse1 product
- parsson< 1.0.5 | ≥ 1.1.0, < 1.1.4
Eclipse foundation1 product
- parsson< 1.0.5 | ≥ 1.1.0, < 1.1.4
Org.eclipse.parsson1 product
- project≥ 1.1.0, < 1.1.4 | < 1.0.5
3 vendors · 3 products
