Staging Environment: Content and features may be unstable or change without notice.
Search for packages
Package details: pkg:gem/grpc@1.55
purl pkg:gem/grpc@1.55
Tags Ghost
Next non-vulnerable version None.
Latest non-vulnerable version None.
Risk 4.0
Vulnerabilities affecting this package (2)
Vulnerability Summary Fixed by
VCID-9rmn-3anf-fqcm
Aliases:
CVE-2023-33953
GHSA-496j-2rq6-j6cc
Excessive Iteration in gRPC gRPC contains a vulnerability that allows hpack table accounting errors could lead to unwanted disconnects between clients and servers in exceptional cases/ Three vectors were found that allow the following DOS attacks: - Unbounded memory buffering in the HPACK parser - Unbounded CPU consumption in the HPACK parser The unbounded CPU consumption is down to a copy that occurred per-input-block in the parser, and because that could be unbounded due to the memory copy bug we end up with an O(n^2) parsing loop, with n selected by the client. The unbounded memory buffering bugs: - The header size limit check was behind the string reading code, so we needed to first buffer up to a 4 gigabyte string before rejecting it as longer than 8 or 16kb. - HPACK varints have an encoding quirk whereby an infinite number of 0’s can be added at the start of an integer. gRPC’s hpack parser needed to read all of them before concluding a parse. - gRPC’s metadata overflow check was performed per frame, so that the following sequence of frames could cause infinite buffering: HEADERS: containing a: 1 CONTINUATION: containing a: 2 CONTINUATION: containing a: 3 etc…
1.55.2
Affected by 0 other vulnerabilities.
1.55.3
Affected by 1 other vulnerability.
1.56.2
Affected by 1 other vulnerability.
VCID-sufp-vkzp-xygp
Aliases:
CVE-2023-4785
GHSA-p25m-jpj4-qcrr
Denial of Service Vulnerability in gRPC TCP Server (Posix-compatible platforms) Lack of error handling in the TCP server in Google's gRPC starting version 1.23 on posix-compatible platforms (ex. Linux) allows an attacker to cause a denial of service by initiating a significant number of connections with the server. Note that gRPC C++ Python, and Ruby are affected, but gRPC Java, and Go are NOT affected.
1.55.3
Affected by 1 other vulnerability.
1.56.2
Affected by 1 other vulnerability.
Vulnerabilities fixed by this package (0)
Vulnerability Summary Aliases
This package is not known to fix vulnerabilities.

Date Actor Action Vulnerability Source VulnerableCode Version
2026-04-01T15:18:23.675368+00:00 Ruby Importer Affected by VCID-sufp-vkzp-xygp https://github.com/rubysec/ruby-advisory-db/blob/master/gems/grpc/CVE-2023-4785.yml 38.0.0
2026-04-01T15:18:23.626812+00:00 Ruby Importer Affected by VCID-9rmn-3anf-fqcm https://github.com/rubysec/ruby-advisory-db/blob/master/gems/grpc/CVE-2023-33953.yml 38.0.0