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CVE-2023-29013

HTTP header parsing could cause a deny of service

7.5 HighFix available

Traefik (pronounced traffic) is a modern HTTP reverse proxy and load balancer for deploying microservices. There is a vulnerability in Go when parsing the HTTP headers, which impacts Traefik. HTTP header parsing could allocate substantially more memory than required to hold the parsed headers. This behavior could be exploited to cause a denial of service. This issue has been patched in versions 2.9.10 and 2.10.0-rc2.

Attack profile

How easy it is to exploit

Attack vector
Network
Complexity
Low
Privileges needed
None
User interaction
None

What an attacker can affect

Confidentiality
None
Integrity
None
Availability
High

Exploit likelihood

1.08%Up 1.0 points since Apr 15, 2023
90%50%10%1%

What each source reports

CVE List Score used 7.5

HTTP header parsing could cause a deny of service

Traefik (pronounced traffic) is a modern HTTP reverse proxy and load balancer for deploying microservices. There is a vulnerability in Go when parsing the HTTP headers, which impacts Traefik. HTTP header parsing could allocate substantially more memory than required to hold the parsed headers. This behavior could be exploited to cause a denial of service. This issue has been patched in versions 2.9.10 and 2.10.0-rc2.

Record
CVE-2023-29013
CVSS 3.1
7.5 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Weakness
CWE-400
Updated
2026-11-02
EUVDEUVD-2023-1226 7.5

Traefik (pronounced traffic) is a modern HTTP reverse proxy and load balancer for deploying microservices. There is a vulnerability in Go when parsing the HTTP headers, which impacts Traefik. HTTP header parsing could allocate substantially more memory than required to hold the parsed headers. This behavior could be exploited to cause a denial of service. This issue has been patched in versions 2.9.10 and 2.10.0-rc2.

Record
EUVD-2023-1226
CVSS 3.1
7.5 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Updated
2026-11-03
GitHub AdvisoriesGHSA-7hj9-rv74-5g92 7.5

Traefik HTTP header parsing could cause a denial of service

Impact

There is a vulnerability in Go when parsing the HTTP headers, which impacts Traefik. HTTP header parsing could allocate substantially more memory than required to hold the parsed headers. This behavior could be exploited to cause a denial of service.

References

Patches

Workarounds

No workaround.

For more information

If you have any questions or comments about this advisory, please open an issue.

Record
GHSA-7hj9-rv74-5g92
CVSS 3.1
7.5 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Weakness
CWE-400
Updated
2026-11-02
NVD 7.5

Traefik (pronounced traffic) is a modern HTTP reverse proxy and load balancer for deploying microservices. There is a vulnerability in Go when parsing the HTTP headers, which impacts Traefik. HTTP header parsing could allocate substantially more memory than required to hold the parsed headers. This behavior could be exploited to cause a denial of service. This issue has been patched in versions 2.9.10 and 2.10.0-rc2.

Record
CVE-2023-29013
CVSS 3.1
7.5 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Weakness
CWE-400
Updated
2026-11-02
OSVALPINE-CVE-2023-29013 7.5

Traefik (pronounced traffic) is a modern HTTP reverse proxy and load balancer for deploying microservices. There is a vulnerability in Go when parsing the HTTP headers, which impacts Traefik. HTTP header parsing could allocate substantially more memory than required to hold the parsed headers. This behavior could be exploited to cause a denial of service. This issue has been patched in versions 2.9.10 and 2.10.0-rc2.

Record
ALPINE-CVE-2023-29013
CVSS 3.1
7.5 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Updated
2026-11-03
OSV 7.5

HTTP header parsing could cause a deny of service

Traefik (pronounced traffic) is a modern HTTP reverse proxy and load balancer for deploying microservices. There is a vulnerability in Go when parsing the HTTP headers, which impacts Traefik. HTTP header parsing could allocate substantially more memory than required to hold the parsed headers. This behavior could be exploited to cause a denial of service. This issue has been patched in versions 2.9.10 and 2.10.0-rc2.

Record
CVE-2023-29013
CVSS 3.1
7.5 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Weakness
CWE-400
Updated
2026-11-02
OSVGHSA-7hj9-rv74-5g92 7.5

Traefik HTTP header parsing could cause a denial of service

Impact

There is a vulnerability in Go when parsing the HTTP headers, which impacts Traefik. HTTP header parsing could allocate substantially more memory than required to hold the parsed headers. This behavior could be exploited to cause a denial of service.

References

Patches

Workarounds

No workaround.

For more information

If you have any questions or comments about this advisory, please open an issue.

Record
GHSA-7hj9-rv74-5g92
CVSS 3.1
7.5 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Weakness
CWE-400
Updated
2026-11-02
OSVopenSUSE-SU-2024:13007-1 No score

traefik-2.10.1-1.1 on GA media

These are all security issues fixed in the traefik-2.10.1-1.1 package on the GA media of openSUSE Tumbleweed.

Record
openSUSE-SU-2024:13007-1
Updated
2026-11-02
OSVopenSUSE-SU-2024:14076-1 No score

traefik2-2.11.5-1.1 on GA media

These are all security issues fixed in the traefik2-2.11.5-1.1 package on the GA media of openSUSE Tumbleweed.

Record
openSUSE-SU-2024:14076-1
Updated
2026-11-02

Affected products

Affected packages

Affected packages
PackageAffectedFixed
github.com/traefik/traefik/v2
Go
before 2.9.10
2.9.10
github.com/traefik/traefik/v2
Go
2.10.0-rc1 to 2.10.0-rc1
2.10.0-rc2
traefik
Alpine:v3.18
before 2.9.10-r0
2.9.10-r0
traefik
Alpine:v3.19
before 2.9.10-r0
2.9.10-r0
traefik
Alpine:v3.20
before 2.9.10-r0
2.9.10-r0
traefik
Alpine:v3.21
before 2.9.10-r0
2.9.10-r0
traefik
Alpine:v3.22
before 2.9.10-r0
2.9.10-r0
traefik
Alpine:v3.23
before 2.9.10-r0
2.9.10-r0
traefik
Alpine:v3.24
before 2.9.10-r0
2.9.10-r0
github.com/traefik/traefik/v2
Go
2.10.0-rc1 up to 2.10.0-rc2
2.10.0-rc2
traefik
openSUSE:Tumbleweed
before 2.10.1-1.1
2.10.1-1.1
traefik2
openSUSE:Tumbleweed
before 2.11.5-1.1
2.11.5-1.1

History

History
RecordedChangedSources
affected, aliases, referencesOSV
aliasesEUVD
first indexedCVE List, GitHub Advisories, NVD, OSV

Dates are when Every CVE recorded each change. Upstream dates may differ.

In short

CVE-2023-29013 is a high vulnerability (CVSS 7.5) in Traefik, published April 11, 2023. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 1.08%, the 65th percentile. Fixed in github.com/traefik/traefik/v2 2.9.10.

References

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