low2.5
CVE-2026-54326
Pi Agent: Potential XSS in HTML session exports via Markdown URL sanitization bypass
Impact
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.
Affected packages
| Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|
| npm | @mariozechner/pi-coding-agent | >= 0.27.5, <= 0.73.1 | none recorded |
| npm | @earendil-works/pi-coding-agent | >= 0.74.0, < 0.78.1 | 0.78.1 |
Weakness classification
References
- NVD record
- CVE.org record
- GitHub advisory
- https://github.com/advisories/GHSA-7v5m-pr3q-6453
- https://github.com/earendil-works/pi/security/advisories/GHSA-7v5m-pr3q-6453
- https://github.com/earendil-works/pi/commit/6cb23f9b5d5b6d1747672f535b167d0d809ac010
- https://github.com/earendil-works/pi/releases/tag/v0.78.1
- https://nvd.nist.gov/vuln/detail/CVE-2026-54326