PT-2026-28186 · Unknown · Orc Discount

Mthg · Published 2026-03-26 · Updated 2026-03-26 · CVE-2026-4833

Positive Technologies (AI Summary)

CVSS v3.1

3.3

Low

Base vector

AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L

Name of the Vulnerable Software and Affected Versions Orc discount versions up to 3.0.1.2

Description A flaw exists in the Markdown Handler component of Orc discount, specifically within the compile function of the markdown.c file. This issue leads to uncontrolled recursion, allowing for local execution of attacks. The exploit is publicly available. The project maintainer acknowledges this as a duplicate of a previously known bug involving an infinitely deep blockquote input causing a crash.

Recommendations Versions prior to 3.0.1.2 should be updated.

Exploit

Fix

Improper Resource Release

Uncontrolled Recursion

Weakness Enumeration

CWE-404

CWE-674

Related Identifiers

CVE-2026-4833

Affected Products

Orc Discount

References · 14

• 🔥❌ https://github.com/user-attachments/files/25847391/crash00.md · Exploit, Deleted
• https://ubuntu.com/security/CVE-2026-4833 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2026-4833 · Security Note
• https://security-tracker.debian.org/tracker/CVE-2026-4833 · Vendor Advisory
• https://osv.dev/vulnerability/UBUNTU-CVE-2026-4833 · Vendor Advisory
• https://cve.org/CVERecord?id=CVE-2026-4833 · Security Note
• https://osv.dev/vulnerability/DEBIAN-CVE-2026-4833 · Vendor Advisory
• https://github.com/Orc/discount/issues/305#issuecomment-4027546673 · Note
• https://github.com/Orc/discount/issues/305 · Note
• https://twitter.com/CVEnew/status/2037137761073860938 · Twitter Post
• https://vuldb.com/?submit.775841 · Note
• https://vuldb.com/?id.353138 · Note
• https://vuldb.com/?ctiid.353138 · Note
• https://github.com/Orc/discount · Note