CVE-2023-29013Network attack vector

Service interruption via excessive header allocation

Published Apr 14, 2023 · Updated Feb 13, 2025

Uncontrolled resource consumption in Traefik Proxy before 2.9.10 and 2.10.0-rc1 allows remote attackers to exhaust memory via HTTP headers. Go's shared net/http and net/textproto header parser overallocates memory for certain unusual patterns in small HTTP requests. Any network client that can reach a Traefik HTTP entry point can drive disproportionate allocation without authentication, terminating service when memory is exhausted.

CVSS severity7.5
High
EPSS probability1.08%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Uncontrolled resource consumption in Traefik Proxy before 2.9.10 and 2.10.0-rc1 allows remote attackers to exhaust memory via HTTP headers. Go's shared net/http and net/textproto header parser overallocates memory for certain unusual patterns in small HTTP requests. Any network client that can reach a Traefik HTTP entry point can drive disproportionate allocation without authentication, terminating service when memory is exhausted.

The record

CVE
CVE-2023-29013
Published
Apr 14, 2023
Updated
Feb 13, 2025
Vendor
Traefik Labs
Product
Traefik Proxy
Classifications
CWE-400, T1499.003
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Apr 14, 2023CVE publishedPublication date reported by the CVE source.
  2. Feb 13, 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== 2.10.0-rc1
  2. Affected versionversion=< 2.9.10

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Traefik Labs · Traefik Proxyversion== 2.10.0-rc1; version=< 2.9.10

Published CVSS scores

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 exploitUnconfirmed

Weakness, pattern, technique

CWE-400Uncontrolled Resource Consumption
T1499.003Application Exhaustion Flood

Public exploit references

No public exploit references are available in this record.

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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