5.3

CVE-2023-32732: Denial-of-Service in gRPC

Modified
AliasesGHSA-9hxf-ppjv-w6rqPYSEC-2026-1426UBUNTU-CVE-2023-32732
Published 09-06-2023Last modified 13-02-2025

Vulnerability summary

CVE-2023-32732 is a medium (CVSS 5.3) Expected Behavior Violation vulnerability in fedoraproject fedora. EPSS estimates a 0.53% chance of exploitation in the next 30 days, higher than 44.6% of scored vulnerabilities.

Priority
Routine

Not severe (CVSS 5.3, network access); no exploitation reported by the 5 checked sources

Source freshness unavailable

How is this decided?
CVSS score
5.3/10
010
Medium · v3.1 (CVE.org)
EPSS score
0.53%
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 2 · Related 5
OPENSUSE-SU-2026:11926-1SUSE-SU-2024:0573-1CGA-9WHX-98QM-Q5PFCGA-MPFJ-QRF3-73FPCGA-PRCF-7V2W-8GFC

Timeline

  1. 09-06-2023
    PublishedVulnerability first disclosed.
  2. 13-02-2025
    Last modifiedVulnerability information updated.

Description

gRPC contains a vulnerability whereby a client can cause a termination of connection between a HTTP2 proxy and a gRPC server: a base64 encoding error for `-bin` suffixed headers will result in a disconnection by the gRPC server, but is typically allowed by HTTP2 proxies. We recommend upgrading beyond the commit in  https://github.com/grpc/grpc/pull/32309 https://www.google.com/url

CVSS metrics

9 scores · 9 sources · 1 version

EPSS trend

Probability

0.53%

Chance of exploitation in the next 30 days

Percentile

45%

Versus all other CVEs

30-day change

No change 0.00 pp

From 0.53% 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.

Chainguard2 products
  • grpc-1.44All versions (No fix recorded)
  • wavefront-proxy< 13.4-r1
Debian1 product
  • grpcAll versions (No fix recorded)
Fedoraproject1 product
Google1 product
  • grpc≥ 1.53, < 1.54
Grpc1 product
Io.grpc1 product
  • grpc-protobuf≥ 1.53.0, < 1.53.1 | ≥ 1.54.0, < 1.54.2
PyPI1 product
  • grpcio≥ 1.53.0, < 1.53.1 | ≥ 1.54.0, < 1.54.2
RubyGems1 product
  • grpc≥ 1.53.0, < 1.53.1 | ≥ 1.54.0, < 1.54.2
Ubuntu1 product
  • grpcAll versions (No fix recorded)
Wolfi1 product
  • wavefront-proxy< 13.4-r1

10 vendors · 11 products

References

17 links
Show all 17 references