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CVE PROGRAM SOURCE RECORD7.1 High

CVE-2026-6409

Denial of Service (DoS) vulnerability exists in the Protobuf PHP library during the parsing of untrusted input

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Status
Published
Published
Updated
Assigning organization
Google

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.

Affected products

Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.

Protocol Buffers Protobuf-php (Pecl)

Default version status: unaffected

  • 0 to < 5.34.0-RC1affected
  • 0 to < 4.33.6affected

References