CVE-2026-35201

MEDIUM

rdiscount 1.3.1.1-2.2.7.3 Markdown Parser - Out-of-Bounds Read

Title source: manual
STIX 2.1

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.

References (1)

Core 1
Core References

Scores

CVSS v3 5.9
EPSS 0.0027
EPSS Percentile 19.0%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H

CISA SSVC

Vulnrichment
Exploitation poc
Automatable no
Technical Impact partial

Details

CWE
CWE-125
Status published
Products (3)
dafoster/rdiscount 1.3.1.1 - 2.2.7.4
davidfstr/rdiscount >= 1.3.1.1, < 2.2.7.4
rubygems/rdiscount 1.3.1.1 - 2.2.7.4RubyGems
Published Apr 06, 2026
Tracked Since Apr 07, 2026