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Fencer Vulns
high 7.5

CVE-2023-29013 json

HTTP header parsing could cause a deny of service

published 2023-04-11 3 y ago modified 2026-09-10 1 mo ago also GHSA-7hj9-rv74-5g92 , EUVD-2023-1226

cvss
7.5
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
1.1%
EPSS 1.1% chance of exploitation in 30 days, percentile 65%
public exploits
0
none known

Summary

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.

Patch / fix

  • go github.com/traefik/traefik/v2 2.9.10, 2.10.0-rc2
  • traefik traefik 2.9.10
  • traefik2 openSUSE Tumbleweed 2.11.5-1.1
  • traefik openSUSE Tumbleweed 2.10.1-1.1

opensuse advisories openSUSE-SU-2024:14076-1openSUSE-SU-2024:13007-1

  • traefik Alpine 3.24, Alpine 3.23, Alpine 3.22 +4 more 2.9.10-r0

alpine advisories ALPINE-CVE-2023-29013

Alpine secdb © Alpine Linux, from https://secdb.alpinelinux.org via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

CISA SSVC

Exploitation
none
Automatable
yes
Technical impact
partial
Assessed
21 mo ago

Exploit prediction

1.08% chance of exploitation in the next 30 days, higher than 65% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
CNA 3.1 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
NVD 3.1 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
GitHub 3.1 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Affected packages

ecosystem package affected fixed in
go github.com/traefik/traefik/v2
<2.9.10
>=2.10.0-rc1, <2.10.0-rc2
2.9.10
2.10.0-rc2

Affected products

  • traefik traefik

Classification

Weakness
  • CWE-400 Uncontrolled Resource Consumption

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.