gRPC Reachable Assertion issue
There exists an vulnerability causing an abort() to be called in gRPC. The following headers cause gRPC's C++ implementation to abort() when called via http2:
te: x (x != trailers)
:scheme: x (x != http, https)
grpclb_client_stats: x (x == anything)
On top of sending one of those headers, a later header must be sent that gets the total header size past 8KB. We recommend upgrading past git commit 2485fa94bd8a723e5c977d55a3ce10b301b437f8 or v1.53 and above.
Affected software
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| Platform | Package | Vulnerable versions | Fixed in |
|---|---|---|---|
| Java / Kotlin (Maven) | io.grpc:grpc-protobuf | >= 1.51.0, < 1.53.0 | 1.53.0 |
| Python (PyPI) | grpcio | >= 1.51.0, < 1.53.0 | 1.53.0 |
References
- https://nvd.nist.gov/vuln/detail/CVE-2023-1428
- https://github.com/grpc/grpc/issues/33463
- https://github.com/grpc/grpc/commit/2485fa94bd8a723e5c977d55a3ce10b301b437f8
- https://github.com/rubysec/ruby-advisory-db/blob/master/gems/grpc/CVE-2023-1428.yml
- https://pypi.org/project/grpcio
- https://github.com/advisories/GHSA-6628-q6j9-w8vg
- CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H- Weakness (CWE)
CWE-617- Platform
- Java / Kotlin (Maven), Python (PyPI)
- Package
io.grpc:grpc-protobuf, grpcio- Disclosed
- 06.07.2023
- Updated
- 11.10.2026 13:19
Sources and licenses
OSV / GitHub Advisory Database - PYSEC-2026-1425 - PyPA Advisory Database; CC BY 4.0
OSV / GitHub Advisory Database - GHSA-6628-q6j9-w8vg - CC BY 4.0
Vulnerability history: io.grpc:grpc-protobuf
All published vulnerabilities of this package (Java / Kotlin (Maven)), newest first. Shows whether this is a one-off slip or a package that needs watching.
- Total entries
- 3
- First → latest
- 07.2023 07.2023
- Without a fix
- 0
- Exploited in attacks
- 0
Severity breakdown
- High 2
- Medium 1
Disclosures per year
- 2023: 3
- 2024: 0
- 2025: 0
- 2026: 0
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gRPC Reachable Assertion issue this entry
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