Vulnerability in Orc Discount
CVE-2026-4833
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."
Published · last modified .
CVSS v3 metric
CVSS v3 base score 3.3 (Low). Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L.
EPSS exploit prediction
EPSS: 0.002 (4.6th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 5th percentile — 4.6% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.001 · newest: 0.002 · change: +0.000
Affected products
- Orc Discount — versions 3.0.1.0, 3.0.1.1, 3.0.1.2
Weakness classification (CWE)
References
- vuldb.com/ (technical-description, vdb-entry)
- vuldb.com/ (signature, permissions-required)
- vuldb.com/ (third-party-advisory)
- github.com/Orc/discount/issues/305 (issue-tracking)
- github.com/Orc/discount/issues/305 (issue-tracking)
- github.com/user-attachments/files/25847391/crash00.md (exploit)
- github.com/Orc/discount/ (product)
Frequently asked questions
- What is CVE-2026-4833?
- CVE-2026-4833 is a low-severity vulnerability in Orc Discount, classified under Improper Resource Shutdown or Release. CVSS score: 3.3/10. Published 2026-03-26.
- How severe is CVE-2026-4833?
- Low severity. CVSS v3 base score is 3.3 out of 10.