7.5

CVE-2023-4785: Denial of Service in gRPC Core

Modified
AliasesGHSA-p25m-jpj4-qcrrPYSEC-2026-1428UBUNTU-CVE-2023-4785
Published 13-09-2023Last modified 12-01-2026

Vulnerability summary

CVE-2023-4785 is a high (CVSS 7.5) Uncaught Exception vulnerability in google grpc. EPSS estimates a 0.77% chance of exploitation in the next 30 days, higher than 55.7% of scored vulnerabilities.

Priority
Prioritisesevere

Severe, CVSS 7.5 (CVE.org); no exploitation reported by the 5 checked sources; EPSS 1% (FIRST, 03-11-2026)

Source freshness unavailable

How is this decided?
CVSS score
7.5/10
010
High · v3.1 (CVE.org)
EPSS score
0.77%
0%100%
Low · 0.00 pp in 30 days
KEVNot listedNot listed by any tracked catalog.
RansomwareNot flaggedNo ransomware use recorded.
Public exploits0No public exploits recorded

Advisory lineage

Upstream 0 · Downstream 3 · Related 4
OPENSUSE-SU-2026:11926-1RHSA-2024:0797SUSE-SU-2024:0573-1CGA-VR55-29VV-J265CGA-XFGF-QG5M-FFG9

Timeline

  1. 13-09-2023
    PublishedVulnerability first disclosed.
  2. 12-01-2026
    Last modifiedVulnerability information updated.

Description

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.

CVSS metrics

8 scores · 8 sources · 1 version

EPSS trend

Probability

0.77%

Chance of exploitation in the next 30 days

Percentile

56%

Versus all other CVEs

30-day change

No change 0.00 pp

From 0.77% on 04-10-2026

04-10-202603-11-2026

Known exploited

Compare KEV catalogs
CISA KEV

Not in the CISA KEV catalog.

ENISA CNW

Not in the ENISA CNW catalog.

CIRCL

Not in the CIRCL catalog.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Version check

Known conditions: network-reachable, no authentication, no user interaction (CVSS vector). Other conditions: not stated in public data.

Chainguard5 products
  • grpc-1.44All versions (No fix recorded)
  • kube-fluentd-operator< 1.18.2-r1
  • kube-fluentd-operator-compat< 1.18.2-r1
  • kube-fluentd-operator-default-config< 1.18.2-r1
  • kube-fluentd-operator-oci-entrypoint< 1.18.2-r1
Wolfi4 products
  • kube-fluentd-operator< 1.18.2-r1
  • kube-fluentd-operator-compat< 1.18.2-r1
  • kube-fluentd-operator-default-config< 1.18.2-r1
  • kube-fluentd-operator-oci-entrypoint< 1.18.2-r1
Debian1 product
  • grpcAll versions (No fix recorded)
Google1 product
  • grpc≥ 1.56.0, ≤ 1.56.1 | ≥ 1.55.0, ≤ 1.55.2 | ≥ 1.54.0, ≤ 1.54.2 | ≥ 1.53.0, ≤ 1.53.1
Grpc1 product
  • grpc≥ 1.23.0, < 1.53.2 | ≥ 1.54.0, < 1.54.3 | ≥ 1.55.0, < 1.55.3 | 1.56.0
PyPI1 product
  • grpcio≥ 1.55.0, < 1.55.3 | ≥ 1.54.0, < 1.54.3 | ≥ 1.53.0, < 1.53.2
RubyGems1 product
  • grpc≥ 1.56.0, < 1.56.2 | ≥ 1.55.0, < 1.55.3 | ≥ 1.54.0, < 1.54.3 | ≥ 1.53.0, < 1.53.2
Ubuntu1 product
  • grpcAll versions (No fix recorded)

8 vendors · 15 products

References

19 links
Show all 19 references