Resource exhaustion in Eclipse Foundation Parsson
CVE-2026-9563
In Eclipse Parsson published Maven Central artifacts before version 1.1.8, the JSON parser did not enforce a default maximum on the number of characters consumed while parsing a single JSON document. Applications that parse attacker- controlled JSON can be forced to consume excessive CPU and memory by processing very large documents, including large arrays, objects, strings, numbers, whitespace, or nested structures, resulting in a denial of service. Eclipse Parsson 1.1.8 introduces a configurable maximum parsing limit with a default limit of 15 million parser-consumed characters.
Vulnerability class: DoS (Denial of Service)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.
EPSS exploit prediction
EPSS: 0.006 (48.3th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 48th percentile — 48.3% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.006 · newest: 0.006 · change: 0.000
Affected products
- Eclipse Foundation Parsson — versions 1.0.0
Weakness classification (CWE)
References
Frequently asked questions
- What is CVE-2026-9563?
- CVE-2026-9563 is a high-severity vulnerability in Eclipse Foundation Parsson, classified under Uncontrolled Resource Consumption. CVSS score: 7.5/10. Published 2026-07-02.
- How severe is CVE-2026-9563?
- High severity. CVSS v3 base score is 7.5 out of 10.