CVE-2026-6409
Denial of Service (DoS) vulnerability exists in the Protobuf PHP library during the parsing of untrusted input
Summary
Denial of Service (DoS) vulnerability exists in the Protobuf PHP library during the parsing of untrusted input
Original description
The description as published by the source.
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.
Source: OSV.dev (Open Source Vulnerabilities) NVD GitHub Advisory OSV
Fix status by distribution
Fixed packages published by each distribution for this CVE
- Debian DEBIAN-CVE-2026-6409 protobuf
- Ubuntu UBUNTU-CVE-2026-6409 protobuf
References
- advisory github.com
- advisory github.com
- advisory nvd.nist.gov