HOMEVULNERABILITIESCVE-2023-32732
MEDIUM

CVE-2023-32732

CWE-440Published: June 9, 2023· Updated: Jun 17, 2026

5.3
CVSS v3.1

Official 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

NVD Source

Technical Analysis

CVE-2023-32732 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

The vulnerability requires no privileges and no user interaction, making it a prime target for automated exploitation campaigns and worm-like propagation.

CVSS v3.1 Vector Breakdown

Exploitability
Attack VectorNetwork
Attack ComplexityLow
Privileges Req.None
User InteractionNone
ScopeUnchanged
Impact
ConfidentialityNone
IntegrityNone
AvailabilityLow
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L

Affected Vendors & Products

Fedora1 product(s)
fedora
grpc1 product(s)
grpc
Source: NVD CPE · 3 total CPE entries

Exploit & PoC Resources

NO KNOWN EXPLOITNo public exploit confirmed at this time
Exploit-DB
Offensive Security exploit database
GitHub PoC Search
Community PoC repositories
Rapid7 / Metasploit
Metasploit module search
PacketStorm
Security advisories & exploits
NVD Detail
Official NIST entry
MITRE CVE
CVE Program entry
External links open in a new tab. Always verify in a controlled environment before use.

Official Patches & Advisories

PATCHhttps://github.com/grpc/grpc/pull/32309
PATCHhttps://github.com/grpc/grpc/pull/32309

All References (6)

→
https://github.com/grpc/grpc/pull/32309Issue Tracking · Patch
→
https://lists.fedoraproject.org/archives/list/[email protected]/message/37IDNVY5AWVH7JDMM2SDTL24ZPPZJNSY/Mailing List
→
https://lists.fedoraproject.org/archives/list/[email protected]/message/VWE44J5FG7THHL7XVEVTNIGEYBNKJBLL/Mailing List
→
https://github.com/grpc/grpc/pull/32309Issue Tracking · Patch
→
https://lists.fedoraproject.org/archives/list/[email protected]/message/37IDNVY5AWVH7JDMM2SDTL24ZPPZJNSY/Mailing List
→
https://lists.fedoraproject.org/archives/list/[email protected]/message/VWE44J5FG7THHL7XVEVTNIGEYBNKJBLL/Mailing List

Quick Facts

CVE IDCVE-2023-32732
CVSS Score5.3 / 10
SeverityMEDIUM
WeaknessCWE-440
CISA KEVNo
Affected2 vendor(s)
PublishedJun 9, 2023

Related CVEs (CWE-440)

CVE-2019-6569
9.1
CVE-2024-32971
9.0
CVE-2025-8850
8.8
CVE-2026-8806
8.7
CVE-2018-12550
8.1
CVE-2023-4807
7.8

Recommended Actions

  • →Apply vendor patches immediately
  • →Monitor CVE-2023-32732 in threat intel feeds
  • →Review IDS/IPS signatures for exploitation attempts
Data sourced from NVD (NIST), CISA KEV, and EPSS (FIRST). Analysis generated by CTIWATCH.COM. CVE data is provided under the NVD usage policy.
← All Vulnerabilities·Search for CVE-2023-32732·NVD