CVE-2023-32732

Denial-of-Service in gRPC

MEDIUM
5.3
CVSS Score
Published: June 9, 2023 at 10:48 AM UTC
Updated: June 17, 2026 at 05:59 AM UTC
2 products affected across 2 vendorsFedoraGrpc

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Severity
MEDIUM5.3
Exploit prediction
EPSS 0.5%
SSVC
No known exploit

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

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

v < 1.53.01.53 ≤ v < 1.541.53
Affected range stops below 1.53.0, so it looks safe — our inference, not a vendor statement
Affected range stops below 1.54, so it looks safe — our inference, not a vendor statement

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

Patch and advisory references

SSVC — Action Prioritization

SSVCNo known exploitAutomatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

5.3MEDIUMGoogle
Attack Vector
NETWORK
Complexity
LOW
Privileges
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
NONE
Integrity
NONE
Availability
LOW
Vector?

Quick Info

StatusMODIFIED
CWE
CWE-440NVD-CWE-Other

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