CVE-2026-6409
Published: April 16th, 2026
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.
Unknown
CVSS v2:
CVSS v2:
Status
| DocFilters Release | Package | State | Justification | Comment |
|---|---|---|---|---|
| 26.2 | protobuf (3.0.0) | Not Affected | Code Not Present | CVE-2026-6409 affects the Protobuf PHP PECL extension (versions < 4.33.6 and < 5.34.0-RC1), specifically php/src/Google/Protobuf/Internal/CodedInputStream.php. Document Filters uses the C++ protobuf library v3.0.0 compiled from source. The PHP directory does not exist in our protobuf-3.0.0 tree, and the vulnerable PHP CodedInputStream class is not compiled, bundled, or used by Document Filters. |
| 26.1 | protobuf (3.0.0) | Needs Triage | ||
| 25.4 | protobuf (3.0.0) | Needs Triage | ||
| 25.3 | protobuf (3.0.0) | Needs Triage | ||
| 25.2 | protobuf (3.0.0) | Needs Triage | ||
| 25.1 | protobuf (3.0.0) | Needs Triage | ||
| 24.4 | protobuf (3.0.0) | Needs Triage | ||
| 24.4.0 | protobuf (3.0.0) | Needs Triage | ||
| 24.3 | protobuf (3.0.0) | Needs Triage | ||
| 24.2 | protobuf (3.0.0) | Needs Triage | ||
| 24.1 | protobuf (3.0.0) | Needs Triage | ||
| 23.3 | protobuf (3.0.0) | Needs Triage | ||
| 23.2 | protobuf (3.0.0) | Needs Triage | ||
| 23.1 | protobuf (3.0.0) | Needs Triage | ||
| 22.4 | protobuf (3.0.0) | Needs Triage | ||
| 22.3 | protobuf (3.0.0) | Needs Triage | ||
| 22.2 | protobuf (3.0.0) | Needs Triage | ||
| 22.1 | protobuf (3.0.0) | Needs Triage | ||
| 21.11 | protobuf (3.0.0) | Needs Triage | ||
| 21.8 | protobuf (3.0.0) | Needs Triage | ||
| 21.5.0 | protobuf (3.0.0) | Needs Triage | ||
| 21.2.0 | protobuf (3.0.0) | Needs Triage | ||
| 11.4.19.3667 | protobuf (3.0.0) | Needs Triage | ||
| 11.4.18.3599 | protobuf (3.0.0) | Needs Triage | ||
| 11.4.16.3445 | protobuf (3.0.0) | Needs Triage | ||
| 11.4.15.3368 | protobuf (3.0.0) | Needs Triage | ||
| 11.4.14.3263 | protobuf (3.0.0) | Needs Triage | ||
| 11.4.13.3179 | protobuf (3.0.0) | Needs Triage | ||
| 11.4.12.3054 | protobuf (3.0.0) | Needs Triage | ||
| 11.4.11.3040 | protobuf (3.0.0) | Needs Triage | ||
| 11.4.11.2990 | protobuf (3.0.0) | Needs Triage | ||
| 11.4.10.2934 | protobuf (3.0.0) | Needs Triage | ||
| 11.4.9.2878 | protobuf (3.0.0) | Needs Triage | ||
| 11.4.8.2822 | protobuf (3.0.0) | Needs Triage |