CVE-2026-6409
Public on 2026-04-16
Modified on 2026-04-17
Description
A Denial of Service (DoS) vulnerability exists in the Protobuf PHP library during the parsing of untrusted input. Maliciously structured messages—specifically those containing negative varints or deep recursion—can be used to crash the application, impacting service availability.
CVSS v3 Base Score
See breakdown
Affected Packages
| Platform | Package | Release Date | Advisory | Status |
|---|---|---|---|---|
| Amazon Linux 2 - Core | protobuf | Not Affected | ||
| Amazon Linux 2023 | protobuf | Not Affected | ||
| Amazon Linux 2 - Core | protobuf-c | Not Affected | ||
| Amazon Linux 2023 | protobuf-c | Not Affected |
CVSS Scores
| Score Type | Score | Vector | |
|---|---|---|---|
| Amazon Linux | CVSSv3 | 7.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |