High severity · published Jul 2, 2026
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…
7.5
CVSS
0.3%
EPSS
No
On KEV
Description
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.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
None
Integrity
None
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.3% · higher than 28% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
EP
Eclipse Parsson · Eclipse Foundation
1.0.0 through 1.1.7 · source: vendor
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-9563
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-9563
github.com
https://github.com/eclipse-ee4j/parsson/commit/134e8d101aa74c8b9302d0cb62f6ccb4912a9d0c
github.com
https://github.com/eclipse-ee4j/parsson/pull/169
github.com
https://github.com/eclipse-ee4j/parsson/tree/1.1.8
gitlab.eclipse.org
https://gitlab.eclipse.org/security/vulnerability-reports/-/work_items/444
repo.maven.apache.org
https://repo.maven.apache.org/maven2/org/eclipse/parsson/parsson/1.1.8/
