# php-standard-library/h2 (Packagist) vulnerabilities

1 known vulnerability (1 high), with the versions each affects and the releases that fix them.

## At a glance

- Latest release: not known (cve.now hasn't read this package's releases)
- Newest unaffected release: not known without release data
- Registry: https://packagist.org/packages/php-standard-library/h2

## Advisories (1)

### [CVE-2026-48979](https://cve.now/CVE-2026-48979): PHP Standard Library: HTTP/2 server-side missing content-length validation enables request smuggling

- Severity: High 7.5
- Published: Jun 17, 2026
- Affected: from 6.1.0, fixed in 6.1.2; from 6.2.0, fixed in 6.2.1.

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