GHSA-7v5m-pr3q-6453

Source

https://github.com/advisories/GHSA-7v5m-pr3q-6453

Import Source

https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/06/GHSA-7v5m-pr3q-6453/GHSA-7v5m-pr3q-6453.json

JSON Data

https://api.osv.dev/v1/vulns/GHSA-7v5m-pr3q-6453

Aliases

CVE-2026-54326

Downstream

MINI-gc3h-mgpf-54f6

Published

2026-06-16T23:43:15Z

Modified

2026-06-17T00:00:10.307316697Z

Severity

2.5 (Low) CVSS_V3 - CVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:U/C:L/I:N/A:N CVSS Calculator

Summary

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

Details

Potential XSS in HTML session exports via Markdown URL handling

Pi HTML exports render session Markdown into a static HTML file. Affected versions 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.

Impact

The realistic attack path is indirect. An attacker would need to get suitable Markdown into a session, for example through prompt injection that causes the model to include an unsafe link, or through other untrusted session content. The user would then need to export the session as HTML, open or share that file, and click the link.

If triggered, script runs in the exported document, not in pi or the user's shell. The main risk is limited disclosure of data embedded in that exported session file.

Affected versions

Affected: @mariozechner/pi-coding-agent >= 0.27.5, <= 0.73.1
Affected: @earendil-works/pi-coding-agent >= 0.74.0, < 0.78.1
Patched: @earendil-works/pi-coding-agent 0.78.1

The old @mariozechner/pi-coding-agent package scope has no patched release. It was renamed to @earendil-works/pi-coding-agent; users of the old scope should migrate to the new package and upgrade to version 0.78.1 or later.

Resolution

Version 0.78.1 sanitizes Markdown link and image URLs with an allow-list after stripping C0 control characters.

Recommendations

Upgrade @earendil-works/pi-coding-agent to version 0.78.1 or later. Regenerate shared HTML exports after upgrading if the underlying sessions contained untrusted content.

Timeline

2026-05-29: Report received through GitHub Security Advisories
2026-06-02: Fix committed
2026-06-04: Fixed version 0.78.1 released
2026-06-08: Advisory prepared for publication

Credits

Reported by Paul Urian and Cosmin Alexa of CrowdStrike.

Database specific

{
    "nvd_published_at": null,
    "severity": "LOW",
    "github_reviewed": true,
    "github_reviewed_at": "2026-06-16T23:43:15Z",
    "cwe_ids": [
        "CWE-79"
    ]
}

References

Affected packages

npm / @mariozechner/pi-coding-agent

Package

Name: @mariozechner/pi-coding-agent; View open source insights on deps.dev
Purl: pkg:npm/%40mariozechner%2Fpi-coding-agent

Affected ranges

Type: SEMVER
Events: Introduced

0.27.5

Last affected

0.73.1

Database specific

source

"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/06/GHSA-7v5m-pr3q-6453/GHSA-7v5m-pr3q-6453.json"

npm / @earendil-works/pi-coding-agent

Package

Name: @earendil-works/pi-coding-agent; View open source insights on deps.dev
Purl: pkg:npm/%40earendil-works%2Fpi-coding-agent

Affected ranges

Type: SEMVER
Events: Introduced

0.74.0

Fixed

0.78.1

Database specific

source

"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/06/GHSA-7v5m-pr3q-6453/GHSA-7v5m-pr3q-6453.json"