Home/CVE/The HTTP/1 client does not fully validate the contents of the Host header. A maliciously crafted Host header can inject
CVE

CVE-2023-29406

The HTTP/1 client does not fully validate the contents of the Host header. A maliciously crafted Host header can inject

The HTTP/1 client does not fully validate the contents of the Host header. A maliciously crafted Host header can inject additional headers or entire requests. With fix, the HTTP/1 client now refuses to send requests containing an invalid Request.Host or Request.URL.Host value.

MEDIUM · CVSS 6.5 EPSS 0.00344
Monitor
  • No active-exploitation, high-EPSS, or public-exploit signals - routine patching cadence
Sigma rules0 YARA rules0
⬡

Weakness Classification

CWE-436Interpretation Conflict
▤

Affected Products & Versions

2
golang go< 1.19.11
golang go>= 1.20.0 and < 1.20.6
▤

Affected Packages

1
Language-ecosystem packages (from OSV) tied to this CVE, with the version that fixes it - the dependency-level detail NVD doesn’t carry.
Go stdlib fixed in 1.19.11, 1.20.6
▣

Scoring & Timeline

6.5
MEDIUM · CVSS v3.1 · security@golang.org
View on NVD
Attack Vector
Network Adjacent Local Physical
Attack Complexity
Low High
Privileges Required
None Low High
User Interaction
None Required
Scope
Unchanged Changed
Confidentiality
None Low High
Integrity
None Low High
Availability
None Low High
Published to NVD11 Jul 2023 · 08:15 PM
CVSS VectorCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N
SSVC triage · cisa-vulnrichment
Exploitation
none
Automatable
no
Technical impact
partial
SSVC asks the questions that actually drive patch urgency: is it being exploited, can attacks be automated, and how total is the impact.
⚑

Vendor Advisories

30
msrcCVE-2023-29406
usnUSN-7109-1
suse-csafSUSE-SU-2024:3656-1
usnUSN-7061-1
suse-csafopenSUSE-SU-2024:13046-1
🔗

References & Sources

6
Source URLs (vendor pages, mailing lists, write-ups). Exploit/PoC links are in their own section above to avoid duplication.
https://go.dev/cl/506996Patch
https://go.dev/issue/60374Issue TrackingPatch
https://groups.google.com/g/golang-announce/c/2q13H6LEEx0Mailing List
https://pkg.go.dev/vuln/GO-2023-1878Vendor Advisory
https://security.gentoo.org/glsa/202311-09
https://security.netapp.com/advisory/ntap-20230814-0002/
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