XSS in Earendil-Works Pi
CVE-2026-54326
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.
Vulnerability class: XSS (Cross-Site Scripting)
EPSS: 0.002 (6.9th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 2.5 (Low). Vector: CVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:U/C:L/I:N/A:N.
Affected products
- Earendil-works Pi — versions >= 0.74.0, < 0.78.1
Weakness classification (CWE)
References
- security-advisories@github.com (x_refsource_CONFIRM)
- security-advisories@github.com (x_refsource_MISC)
- security-advisories@github.com (x_refsource_MISC)
Frequently asked questions
- What is CVE-2026-54326?
- CVE-2026-54326 is a low-severity vulnerability in Earendil-Works Pi, classified under Cross-site Scripting. CVSS score: 2.5/10. Published 2026-06-23.
- How severe is CVE-2026-54326?
- Low severity. CVSS v3 base score is 2.5 out of 10.