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CVE-2015-5741

29
FAUCET Score

CVE-2015-5741 describes a critical vulnerability in the net/http library of Go before version 1.4.3, affecting various Go and Red Hat products. This flaw, categorized as CWE-444, allows remote attackers to perform HTTP request smuggling by manipulating Content-Length and Transfer-Encoding headers. With a CVSS score of 9.8 (CRITICAL), successful exploitation could lead to high impact on confidentiality, integrity, and availability, requiring no user interaction or privileges. Despite its severity, there is no evidence of active exploitation, public exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion or media coverage.

Impacted Technologies

VendorProductVersion(s)CPE
< 1.4.3CPE matchmatch criteria
cpe:2.3:a:golang:go:*:*:*:*:*:*:*:*
7.0CPE matchmatch criteria
cpe:2.3:a:redhat:openstack:7.0:*:*:*:*:*:*:*
8CPE matchmatch criteria
cpe:2.3:a:redhat:openstack:8:*:*:*:*:*:*:*
7.0CPE matchmatch criteria
cpe:2.3:o:redhat:enterprise_linux:7.0:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

9.8CRITICAL

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

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
Exploitability Score
3.9
Impact Score
5.9
CvssVersion
3.1

Exploit Intelligence

EPSS Score
2.70%
Probability of exploitation in next 30 days
EPSS Percentile
84.4%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0270 is in the 75th percentile among its peer group of 36,897 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.3 Bluesky, 0.3 Mastodon, and 2.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.3 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (6)

fedorapatch availablevia nvd_reference
View patch
github_advisorypatch availablevia nvd_reference
View patch
redhatpatch availablevia nvd_reference
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 7Fixed in: golang-0:1.6.3-1.el7_2.1
View patch
redhatend of lifevia redhat_api
Product: Red Hat Enterprise Linux OpenStack Platform 7 (Kilo) Operational ToolsFixed in: golang
redhatend of lifevia redhat_api
Product: Red Hat OpenStack Platform 8 (Liberty) Operational ToolsFixed in: golang

Vendor Advisories (1)

redhatCVE-2015-5741Moderate

golang: HTTP request smuggling in net/http library

Jul 29, 2015

References

lists.fedoraproject.org / pipermail/package-announce/2015-October/167997.html
Mailing ListPatchThird Party Advisory
lists.fedoraproject.org / pipermail/package-announce/2015-October/168029.html
Mailing ListPatchThird Party Advisory
bugzilla.redhat.com / show_bug.cgi
Issue TrackingPatchThird Party Advisory
seclists.org / oss-sec/2015/q3/237
Mailing ListThird Party Advisory
seclists.org / oss-sec/2015/q3/292
Mailing ListThird Party Advisory
seclists.org / oss-sec/2015/q3/294
Mailing ListThird Party Advisory
github.com / golang/go/commit/300d9a21583e7cf0149a778a0611e76ff7c6680f
PatchThird Party Advisory