What is CVE-2026-48988?

CVE-2026-48988 is a medium-severity vulnerability in Markdown-it, classified under Uncontrolled Resource Consumption. CVSS score: 5.3/10. Published 2026-06-17.

How severe is CVE-2026-48988?

Medium severity. CVSS v3 base score is 5.3 out of 10.

Resource exhaustion in Markdown-it

CVE-2026-48988

markdown-it is a Markdown parser. Versions 14.1.1 and below contain a denial-of-service vulnerability when typographer: true is enabled, due to quadratic (O(n^2)) processing in the smartquotes rule. The issue stems from repeatedly modifyin…

Vulnerability class: DoS (Denial of Service)

CVSS v3 metric

CVSS v3 base score 5.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L.

Affected products

Markdown-it — versions < 14.2.0

Weakness classification (CWE)

CWE-400 — Uncontrolled Resource Consumption

References

security-advisories@github.com (x_refsource_CONFIRM)
security-advisories@github.com (x_refsource_MISC)

Frequently asked questions

What is CVE-2026-48988?: CVE-2026-48988 is a medium-severity vulnerability in Markdown-it, classified under Uncontrolled Resource Consumption. CVSS score: 5.3/10. Published 2026-06-17.
How severe is CVE-2026-48988?: Medium severity. CVSS v3 base score is 5.3 out of 10.