CVE-2023-47108Public exploitNetwork attack vector

gRPC service interruption via unbounded metric labels

Published Nov 10, 2023 · Updated Oct 28, 2025

Resource exhaustion in OpenTelemetry-Go Contrib before 0.46.0 allows remote attackers to interrupt instrumented gRPC servers via requests. The UnaryServerInterceptor records net.peer.sock.addr and net.peer.sock.port in rpcDuration histogram attributes without bounding their cardinality, so varied client endpoints create continually new metric series. Exploitation requires a configured metrics pipeline, the unary interceptor, and no middleware or proxy filtering of client addresses and ports; memory exhaustion interrupts the server.

CVSS severity7.5
High
EPSS probability1.59%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Resource exhaustion in OpenTelemetry-Go Contrib before 0.46.0 allows remote attackers to interrupt instrumented gRPC servers via requests. The UnaryServerInterceptor records net.peer.sock.addr and net.peer.sock.port in rpcDuration histogram attributes without bounding their cardinality, so varied client endpoints create continually new metric series. Exploitation requires a configured metrics pipeline, the unary interceptor, and no middleware or proxy filtering of client addresses and ports; memory exhaustion interrupts the server.

The record

CVE
CVE-2023-47108
Published
Nov 10, 2023
Updated
Oct 28, 2025
Vendor
OpenTelemetry
Product
OpenTelemetry-Go Contrib
Classifications
CWE-770, T1499.003
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Nov 10, 2023CVE publishedPublication date reported by the CVE source.
  2. Oct 28, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=>= 0.37.0, < 0.46.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

OpenTelemetry · OpenTelemetry-Go Contribversion=>= 0.37.0, < 0.46.0

Published CVSS scores

7.5NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
7.5GitHub, Inc.CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-770Allocation of Resources Without Limits or Throttling
T1499.003Application Exhaustion Flood

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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