# google/protobuf (Packagist) vulnerabilities

2 known vulnerabilities (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/google/protobuf

## Advisories (2)

### [CVE-2026-6409](https://cve.now/CVE-2026-6409): Denial of Service (DoS) vulnerability exists in the Protobuf PHP library during the parsing of untrusted input

- Severity: High 7.1
- Published: Apr 16, 2026
- Affected: fixed in 4.33.6.

### [CVE-2015-5237](https://cve.now/CVE-2015-5237): protobuf allows remote authenticated attackers to cause a heap-based buffer overflow.

- Severity: Unrated
- Published: Sep 25, 2017
- Affected: fixed in 3.4.0.

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