NVD / CVE Program· CNA GitHub_M

CVE-2023-47633: Uncontrolled Resource Consumption in Traefik

Noroxi assessment

Priority: Monitor (action score 30/100)

The sources we track (CISA KEV, Exploit-DB, Metasploit, Nuclei, GitHub) show no public exploit code or exploitation in the wild.
Probability of exploitation in the next 30 days: 1.2% (FIRST EPSS); higher than 69.8% of all records.
Anyone who can reach it over the internet can trigger it. No account or password is required. No user action is required. No special conditions are required; it is repeatable.
According to CISA the attack is automatable: targets can be found by mass scanning.
Fixed version: github.com/traefik/traefik/v2 (Go) 2.10.6; github.com/traefik/traefik/v3 (Go) 3.0.0-beta5; traefik (openSUSE:Tumbleweed) 2.10.7-1.1.

Low priority for now. Upgrade to github.com/traefik/traefik/v2 (Go) 2.10.6; github.com/traefik/traefik/v3 (Go) 3.0.0-beta5; traefik (openSUSE:Tumbleweed) 2.10.7-1.1 or later.

Generated automatically from the record's data: CVSS (NVD and CNA), CISA KEV and SSVC, FIRST EPSS, exploit sources, fixed versions. How we calculate it

Primary sources: NVD · CVE.org · FIRST EPSS

Traefik is an open source HTTP reverse proxy and load balancer. The traefik docker container uses 100% CPU when it serves as its own backend, which is an automatically generated route resulting from the Docker integration in the default configuration. This issue has been addressed in versions 2.10.6 and 3.0.0-beta5. Users are advised to upgrade. There are no known workarounds for this vulnerability.

HighCVSS 7.5 · v3.1—No exploit Fix available

Published: Dec 4, 2023
Updated: Jun 17, 2026
EPSS: 1.2% · 69th percentile
CWE: CWE-400

Report tools

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Action score

Monitor

Low priority for now.

CVSS: 30 / 40 · 7.5 / 10
CISA KEV: 0 / 30 · Not listed
EPSS: 0 / 30 · 1.2%

CISA SSVC decision

Exploitation: proof of concept
Automatable: yes
Technical impact: partial

Vulnrichment: CISA's decision-tree inputs.

CNA vs NVD score

NVD: 7.5
CNA · GitHub_M: 7.5; agree

The score given by the assigning authority versus NVD’s independent score. A gap means the severity is contested.

Get told when this record changes

Not in KEV: no record of exploitation in the wild
No public exploit code on record
A fix has been released

If any of these changes, we'll tell you in the daily email digest.

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Noroxi analysis

What does it mean in your environment?

The assessment above is generated automatically from the record's data; it doesn't know your environment. Our team verifies on your systems whether this vulnerability is actually exploitable and which mitigation is enough.

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Affected systems

Is your version affected?

Pick the product and type the version you run. It's compared with this record's version ranges in your browser; the version isn't sent anywhere.

Vendor	Product	CPE
traefik	traefik	cpe:2.3:a:traefik:traefik

Affected versions

NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.

traefik traefikup to 2.10.5 inclusive
traefik traefik3.0.0

Versions reported by the vendor

Affected version ranges reported by the assigning authority (GitHub_M). Independent of NVD's CPE analysis and usually ahead of it.

traefik traefik
- < 2.10.6, >= 3.0.0-beta1, < 3.0.0-beta5affected

Package-level exposure

OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.

Ecosystem	Package	Affected range	Fix
Go	github.com/traefik/traefik	from 0	—
Go	github.com/traefik/traefik/v2	before 2.10.6	2.10.6
Go	github.com/traefik/traefik/v3	before 3.0.0-beta5	3.0.0-beta5
openSUSE:Tumbleweed	traefik	before 2.10.7-1.1	2.10.7-1.1
openSUSE:Tumbleweed	traefik2	before 2.11.5-1.1	2.11.5-1.1

Same product

traefik: all records

Other highest-scoring records for the same primary product.

CVE-2026-85595Traefik before v2.11.55 and v3.0.0 through v3.7.10 Authentication Bypass via digestAuth
38Monitor
CVE-2026-88877Traefik v3.7.0 Authentication Bypass via from-to-www-redirect
37Monitor
CVE-2026-88007Traefik HTTP/3 Backend NTLM Connection Reuse
36Monitor

Published before and after this one in the same product

← EarlierCVE-2023-47106Dec 4, 2023 · Incorrect processing of fragment in the URL leads to Authorization Bypass in Traefik
26Monitor
← EarlierCVE-2023-47124Dec 4, 2023 · Denial of service whith ACME HTTPChallenge in Traefik
23Monitor
Later →CVE-2024-28869Apr 12, 2024 · Possible denial of service vulnerability with Content-length header in Traefik
30Monitor

Remediation

Which version to upgrade to

Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.

Product / package	Fixed version	Source
Go:github.com/traefik/traefik/v2	2.10.6	Package registry (OSV)
Go:github.com/traefik/traefik/v3	3.0.0-beta5	Package registry (OSV)
opensuse:traefik	2.10.7-1.1 · openSUSE:Tumbleweed	Package registry (OSV)
opensuse:traefik2	2.11.5-1.1 · openSUSE:Tumbleweed	Package registry (OSV)

Exploit status

No known public exploit

No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.

Research context

For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.

Timeline

From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.

No dated events beyond publication.

No history yet (it accumulates with the daily EPSS job).

Patch and commit links

Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.

No commit or PR link among the references.

Credits

All researchers

Finders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.

No credits in the CNA record.

Variant candidates

Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.

CVE-2023-29013234 days apartHTTP header parsing could cause a deny of service
30Monitor
CVE-2022-39271419 days apartTraefik HTTP/2 connections management could cause a denial of service
30Monitor

Chain candidates

An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.

—

Bug bounty scope

No known public program.

Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).

Technical details

Attack conditions

Anyone who can reach it over the internet can trigger it.
No account or password is required.
No user action is required.
No special conditions are required; it is repeatable.

If successful

Confidentiality: none
Integrity: none
Availability: high · the service can be disrupted

Attack vector: Network
Attack complexity: Low
Privileges required: None
User interaction: None
Scope: Unchanged
Confidentiality impact: None
Integrity impact: None
Availability impact: High

Weakness class (CWE)

CWE-400 · Uncontrolled Resource Consumption

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

nvd-primary

Root cause

Code that parses nested structures sets no depth or size limit. A small input can turn into a disproportionate processing load.

The bug in code

The whole CWE-400 class

A representative example of this vulnerability class. Not the vendor's source code; it shows the faulty pattern and its fix.

Vulnerable

1function expand(node) {
2  return node.children.map(expand);
3}

Fixed

1const MAX_DEPTH = 32;
2function expand(node, depth = 0) {
3  if (depth > MAX_DEPTH) throw new Error("too deep");
4  return node.children.map((c) => expand(c, depth + 1));
5}