CVE•Published 2026-06-22•Modified 2026-06-22•0 articles on news•5 live references•NVD data

CVE-2026-50146Astro · Astro

Vulnerability data via NVD (ingested)

CVSS v3.1

7.1

HIGH

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:H/A:N

EPSS percentile

—

Weaknesses (CWE)

CWE-80Improper Neutralization of Script-Related HTML Tags in a Web Page (Basic XSS)

Description

Astro is a web framework. Prior to 6.3.3, when a component uses a client:* directive, Astro inserts named slot content into a data-astro-template attribute without HTML escaping the slot name allowing an attacker to break out of the attribute context and inject arbitrary HTML, resulting in reflected XSS during SSR. This vulnerability is fixed in 6.3.3.

Timeline

Published 2026-06-22

Modified 2026-06-22

External references

NVD MITRE Exploit-DB GitHub PoC VulnCheck

Search for exposed instances

Shodan + Censys queries derived from NVD's CPE data. The vuln tag catches assets Shodan has explicitly linked to this CVE; the product / banner fingerprints find exposed instances even when the vuln tag was never applied (which is common).

Shodan · vuln tag0 hosts

vuln:CVE-2026-50146

Hosts Shodan has explicitly fingerprinted as vulnerable.

Shodan · product

product:"Astro Astro"

All exposed Astro Astro instances — cross-reference with the CVE's affected-version range.

Shodan · banner/body mention

http.html:"Astro"

HTTP body or banner mentions "Astro" — catches deploys Shodan didn't identify as a product.

More intel sources (5)

Shodan report

vuln:CVE-2026-50146