Discount is an implementation of John Gruber's Markdown markup language in C. From 1.3.1.1 to before 2.2.7.4, a signed length truncation bug causes an out-of-bounds read in the default Markdown parse path. Inputs larger than INT_MAX are truncated to a signed int before entering the native parser, allowing the parser to read past the end of the supplied buffer and crash the process. This vulnerability is fixed in 2.2.7.4.
History

Thu, 16 Apr 2026 04:30:00 +0000

Type Values Removed Values Added
First Time appeared Dafoster
Dafoster rdiscount
CPEs cpe:2.3:a:dafoster:rdiscount:*:*:*:*:*:ruby:*:*
Vendors & Products Dafoster
Dafoster rdiscount

Tue, 07 Apr 2026 18:00:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'poc', 'Technical Impact': 'partial'}, 'version': '2.0.3'}


Tue, 07 Apr 2026 09:45:00 +0000

Type Values Removed Values Added
First Time appeared Davidfstr
Davidfstr rdiscount
Vendors & Products Davidfstr
Davidfstr rdiscount

Mon, 06 Apr 2026 20:00:00 +0000

Type Values Removed Values Added
Description Discount is an implementation of John Gruber's Markdown markup language in C. From 1.3.1.1 to before 2.2.7.4, a signed length truncation bug causes an out-of-bounds read in the default Markdown parse path. Inputs larger than INT_MAX are truncated to a signed int before entering the native parser, allowing the parser to read past the end of the supplied buffer and crash the process. This vulnerability is fixed in 2.2.7.4.
Title Discount has an Out-of-bounds Read in rdiscount
Weaknesses CWE-125
References
Metrics cvssV3_1

{'score': 5.9, 'vector': 'CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H'}


cve-icon MITRE

Status: PUBLISHED

Assigner: GitHub_M

Published: 2026-04-06T19:49:48.806Z

Updated: 2026-04-07T16:21:14.803Z

Reserved: 2026-04-01T18:48:58.937Z

Link: CVE-2026-35201

cve-icon Vulnrichment

Updated: 2026-04-07T16:21:10.246Z

cve-icon NVD

Status : Analyzed

Published: 2026-04-06T20:16:27.893

Modified: 2026-04-16T04:20:29.057

Link: CVE-2026-35201

cve-icon Redhat

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