PT-2026-28186 · Unknown · Orc Discount

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

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

Uncontrolled Recursion

Improper Resource Release

Weakness Enumeration

CWE-674

CWE-404

Related Identifiers

CVE-2026-4833

Affected Products

Orc Discount

References · 16

• 🔥 https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/4xxx/CVE-2026-4833.json · Exploit
• 🔥❌ https://github.com/user-attachments/files/25847391/crash00.md · Exploit, Deleted
• https://nvd.nist.gov/vuln/detail/CVE-2026-4833 · Security Note
• https://osv.dev/vulnerability/UBUNTU-CVE-2026-4833 · Vendor Advisory
• https://osv.dev/vulnerability/CVE-2026-4833 · Vendor Advisory
• https://osv.dev/vulnerability/DEBIAN-CVE-2026-4833 · Vendor Advisory
• https://cve.org/CVERecord?id=CVE-2026-4833 · Security Note
• https://security-tracker.debian.org/tracker/CVE-2026-4833 · Vendor Advisory
• https://ubuntu.com/security/CVE-2026-4833 · Vendor Advisory
• https://github.com/Orc/discount/issues/305 · Note
• https://github.com/Orc/discount/issues/305#issuecomment-4027546673 · Note
• https://twitter.com/CVEnew/status/2037137761073860938 · Twitter Post
• https://vuldb.com/?id.353138 · Note
• https://github.com/Orc/discount · Note
• https://vuldb.com/?ctiid.353138 · Note