CVE-2026-115354CWE-22path-traversal

CVE-2026-115354

Medium · published October 22, 2026

CVSS v3.1
6.5
EPSS
0%
Percentile
25.4
In the wild
Unconfirmed
What it is

Mistune before 3.3.0 contains a path traversal vulnerability in the opt-in Include directive that allows attackers to read local files by supplying relative or absolute include paths. Attackers who submit Markdown rendered via Markdown.read() can disclose files such as /etc/passwd and inject unescaped HTML or script content into rendered output.

The record
Technical detail
CVSS v3.1
6.5 · MEDIUM
Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N
CVSS v4.0
7.1 · CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N
EPSS
0.00333 · 25.4th percentile
Weakness
CWE-22 · Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')
Published
2026-10-22T23:17Z
References (2)
https://github.com/lepture/mistune/security/advisories/GHSA-jhcm-5rpf-j3wv · [email protected]https://www.vulncheck.com/advisories/mistune-before-3.3.0-arbitrary-local-file-read-via-include-directive · [email protected]
EPSS history
Timeline
  • 24 OCT 03:52Z
    EPSS moved — → 0%
    epss
  • 22 OCT 19:13Z
    Mistune before 3.3.0 Arbitrary Local File Read via Include Directive
    cvelistv5
  • 22 OCT 19:13Z
    Mistune before 3.3.0 Arbitrary Local File Read via Include Directive
    cvelistv5