CVE-2026-29975
HIGH EPSS 33.5%
Published May 8, 20261mo ago · Modified Jun 17, 20262w ago
7.5 CVSS 3.1
Published May 8, 2026 1mo ago
Last Modified Jun 17, 2026 2w ago
Description
lwjson 1.8.1 contains an improper input validation vulnerability in the streaming JSON parser (lwjson_stream.c). The end-of-string detection logic incorrectly identifies escaped quote characters by only checking the immediately preceding character rather than counting consecutive backslashes, causing valid JSON strings ending with an escaped backslash (like "\\") to never terminate parsing. A remote attacker can send well-formed JSON to cause applications using lwjson_stream_parse() to hang indefinitely, resulting in denial of service.
CVSS Details
Base Score
Exploitability
Impact
Vector string
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H Attack Vector Network
Attack Complexity Low
Privileges Required None
User Interaction None
Scope Unchanged
Confidentiality None
Integrity None
Availability High
Threat Intelligence
EPSS Exploit Probability
33.5% percentile
Exploit & Patch Status
No Known Exploit
No Patch Available
Weaknesses 1
CWE-835
References 3
- gist.github.com https://gist.github.com/dwilliams27/b99fd41be5d6848691797042cbfc1103
- github.com https://github.com/MaJerle/lwjson/blob/develop/lwjson/src/lwjson/lwjson_stream.c#L362-L364
- github.com https://github.com/MaJerle/lwjson/tree/develop
Remediation
No remediation data recorded yet
Check vendor advisories and the NVD entry for patch availability.