CVE-2026-59711

MEDIUM

CVSS v3.1: 6.1

NetworkNo privilegesXSSVendor advisory ref

Source data as of:

At a glance

Severity
MEDIUM
CVSS
6.1 v3.1 · NVD
EPSS
EPSS not provided by FIRST.org for this CVE
CISA KEV
No
Type
XSS · NVD CWE
Attack conditions (CVSS vector)
NetworkNo privileges · Source: NVD Vector
Published
2026-07-06 · Modified: 2026-07-06
References
Jump to references (3)

CVSS / EPSS / KEV

CVSS v3.1 6.1 / 10 MEDIUM Source: NVD
CVSS v4.0 5.3 / 10 MEDIUM Source: NVD
EPSS — EPSS not provided by FIRST.org for this CVE Source: FIRST.org
CISA KEV No Source: CISA

Source — CVSS: NVD · EPSS: FIRST.org · KEV: CISA. Data & Sources

Description

showdown contains a cross-site scripting vulnerability in metadata title handling that allows attackers to inject arbitrary HTML and JavaScript. When completeHTMLDocument option is enabled, unescaped less-than and greater-than characters in markdown frontmatter metadata are inserted directly into HTML title tags, enabling attackers to break out of the title context and execute malicious scripts in the rendered page.

Record details

CVE ID
CVE-2026-59711
CVSS (v3.1)
6.1 (MEDIUM)
Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
Exploitability subscore
2.8
Impact subscore
2.7
CISA KEV
No
Weakness (CWE)
CWE-79
Affected configurations (CPE)
0
Published
2026-07-06
Modified
2026-07-06
Status
Received

References

Reference URLs as listed by NVD, grouped by a mechanical match on the link's host/pattern. Labels describe the link type only.

Related records

Other records sharing a factual facet, for cross-reference. A descriptive neighbourhood — ordering does not imply priority and is not a recommendation.

Same weakness type (CWE)

CVE-2026-28737 HIGH CVSS 8.7 CVE-2025-53831 HIGH CVSS 8.2 CVE-2026-11998 HIGH CVSS 7.6 CVE-2026-54263 HIGH CVSS 7.3

Published the same year

CVE-2026-13768 CRITICAL CVSS 10.0 CVE-2026-34078 CRITICAL CVSS 10.0 CVE-2026-46595 CRITICAL CVSS 10.0 CVE-2026-48316 CRITICAL CVSS 10.0
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