Orc discount up to 3.0.1.2 Markdown markdown.c compile recursion

Summaryinfo

A vulnerability, which was classified as problematic, was found in Orc discount up to 3.0.1.2. Impacted is the function compile of the file markdown.c of the component Markdown Handler. Such manipulation leads to recursion. This vulnerability is listed as CVE-2026-4833. The attack must be carried out locally. In addition, an exploit is available. 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."

Detailsinfo

A vulnerability was found in Orc discount up to 3.0.1.2 and classified as problematic. Affected by this issue is the function compile of the file markdown.c of the component Markdown Handler. The manipulation with an unknown input leads to a recursion vulnerability. Using CWE to declare the problem leads to CWE-674. The product does not properly control the amount of recursion that takes place, consuming excessive resources, such as allocated memory or the program stack. Impacted is availability.

The advisory is available at github.com. This vulnerability is handled as CVE-2026-4833. The exploitation is known to be easy. Local access is required to approach this attack. Technical details as well as a public exploit are known.

The exploit is available at github.com. It is declared as proof-of-concept. 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."

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

If you want to get best quality of vulnerability data, you may have to visit VulDB.

Productinfo

Vendor

• Orc

Name

• discount

Version

• 3.0.1.0
• 3.0.1.1
• 3.0.1.2

Website

• Product: https://github.com/Orc/discount/

CPE 2.3info

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CPE 2.2info

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Submitinfo

Accepted

• Submit #775841: Orc discount 3.0.1.2 Memory Corruption (by MTHG)

If you want to get best quality of vulnerability data, you may have to visit VulDB.

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