CVE-2026-54326CWE-79

Pi: Potential XSS in HTML session exports via Markdown URL sanitization bypass

Low · published June 23, 2026

CVSS v3.1
2.5
EPSS
0%
Percentile
6.3
In the wild
Unconfirmed
What it is

Pi is a minimal terminal coding harness. From 0.74.0 until 0.78.1, Pi HTML exports render session Markdown into a static HTML file. It did not consistently reject unsafe Markdown link and image URL schemes. In versions with scheme filtering, C0 control characters in the URL scheme could bypass the check because browsers normalize those characters before navigation. This vulnerability is fixed in 0.78.1.

The record
Technical detail
CVSS v3.1
2.5 · LOW
Vector
CVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:U/C:L/I:N/A:N
CVSS v4.0
Not supplied
EPSS
0.00172 · 6.3th percentile
Weakness
CWE-79 · Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
Published
2026-06-23T19:26Z
EPSS history
Timeline
  • 23 JUN 19:26Z
    Pi: Potential XSS in HTML session exports via Markdown URL sanitization bypass
    cvelistv5