CVE-2026-4833
Orc discount Markdown markdown.c compile recursion
- State
- Published
- Severity
- 4.8 Medium
- Published
- Mar 26, 2026
- Updated
- Mar 30, 2026
- Reserved
- Mar 25, 2026
Description
A weakness has been identified in Orc discount up to 3.0.1.2. This issue affects the function compile of the file markdown.c of the component Markdown Handler. This manipulation causes uncontrolled recursion. The attack is restricted to local execution. The exploit has been made available to the public and could be used for attacks. The project maintainer confirms: "[I]f you feed it an infinitely deep blockquote input it will crash. (...) [T]his is a duplicate of an old bug that I've been working on."
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 4.0 | 4.8 Medium | CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:P | VulDB |
| 3.1 | 3.3 Low | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L/E:P/RL:X/RC:C | VulDB |
| 3.0 | 3.3 Low | CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L/E:P/RL:X/RC:C | VulDB |
| 2.0 | 1.7 Low | AV:L/AC:L/Au:S/C:N/I:N/A:P/E:POC/RL:ND/RC:C | VulDB |
Weaknesses
Affected Products
| Product | Versions |
|---|---|
discountOrc |
|
References
- VDB-353138 | Orc discount Markdown markdown.c compile recursionvdb-entrytechnical-description
- VDB-353138 | CTI Indicators (IOB, IOC, IOA)signaturepermissions-required
- Submit #775841 | Orc discount 3.0.1.2 Memory Corruptionthird-party-advisory
- https://github.com/Orc/discount/issues/305issue-tracking
- https://github.com/Orc/discount/issues/305#issuecomment-4027546673issue-tracking
- https://github.com/user-attachments/files/25847391/crash00.mdexploit
- https://github.com/Orc/discount/product
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