CVE-2026-9563: CWE-400 Uncontrolled Resource Consumption in Eclipse Foundation Eclipse Parsson
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.
AI Analysis
Technical Summary
CVE-2026-9563 describes an uncontrolled resource consumption vulnerability (CWE-400) in Eclipse Parsson JSON parser versions prior to 1.1.8. The parser did not enforce a maximum limit on the number of characters consumed during JSON parsing, allowing attacker-controlled input to cause excessive CPU and memory usage by processing very large JSON documents with large arrays, objects, strings, numbers, whitespace, or nested structures. This results in a denial of service condition. Eclipse Parsson 1.1.8 addresses this by introducing a configurable maximum parsing limit with a default of 15 million characters.
Potential Impact
An attacker can cause a denial of service by forcing the JSON parser to consume excessive CPU and memory resources when processing large or deeply nested JSON documents. This impacts availability but does not affect confidentiality or integrity.
Mitigation Recommendations
A fix is available in Eclipse Parsson version 1.1.8, which introduces a configurable maximum parsing limit with a default of 15 million characters. Users should upgrade to version 1.1.8 or later to mitigate this vulnerability. No official patch or temporary fix is indicated beyond upgrading. Since this is not a cloud service, remediation depends on applying the updated version.
CVE-2026-9563: CWE-400 Uncontrolled Resource Consumption in Eclipse Foundation Eclipse Parsson
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 v3.1
Score 7.5high
Affected software
Run on your own infrastructure? Check whether these packages are installed with threat-finder — our free open-source scanner.
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
CVE-2026-9563 describes an uncontrolled resource consumption vulnerability (CWE-400) in Eclipse Parsson JSON parser versions prior to 1.1.8. The parser did not enforce a maximum limit on the number of characters consumed during JSON parsing, allowing attacker-controlled input to cause excessive CPU and memory usage by processing very large JSON documents with large arrays, objects, strings, numbers, whitespace, or nested structures. This results in a denial of service condition. Eclipse Parsson 1.1.8 addresses this by introducing a configurable maximum parsing limit with a default of 15 million characters.
Potential Impact
An attacker can cause a denial of service by forcing the JSON parser to consume excessive CPU and memory resources when processing large or deeply nested JSON documents. This impacts availability but does not affect confidentiality or integrity.
Mitigation Recommendations
A fix is available in Eclipse Parsson version 1.1.8, which introduces a configurable maximum parsing limit with a default of 15 million characters. Users should upgrade to version 1.1.8 or later to mitigate this vulnerability. No official patch or temporary fix is indicated beyond upgrading. Since this is not a cloud service, remediation depends on applying the updated version.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- eclipse
- Date Reserved
- 2026-05-26T10:34:17.499Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Remediation Level
- null
Threat ID: 6a46231427e9c797198a9fd1
Added to database: 07/02/2026, 08:36:36 UTC
Last enriched: 07/02/2026, 08:51:17 UTC
Last updated: 07/03/2026, 03:23:05 UTC
Views: 14
Community Reviews
0 reviewsCrowdsource mitigation strategies, share intel context, and vote on the most helpful responses. Sign in to add your voice and help keep defenders ahead.
Want to contribute mitigation steps or threat intel context? Sign in or create an account to join the community discussion.
Actions
Updates to AI analysis require Pro Console access. Upgrade inside Console → Billing.
Need more coverage?
Upgrade to Pro Console for AI refresh and higher limits.
For incident response and remediation, OffSeq services can help resolve threats faster.
Latest Threats
Check if your credentials are on the dark web
Instant breach scanning across billions of leaked records. Free tier available.