CVE-2015-5741

Name: CVE-2015-5741
Creator: NVD / NIST
Published: 2020-02-08T19:15:10.77+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

CRITICALCVSS 9.8/10EPSS 2.73%

Last modified Jun 17, 2026

CVE-2015-5741 is a critical-severity vulnerability rated 9.8/10 on the CVSS scale. The net/http library in net/http/transfer.go in Go before 1.4.3 does not properly parse HTTP headers, which allows remote attackers to conduct HTTP request smuggling attacks via a request that contains Content-Length and Transfer-Encoding header fields.. EPSS estimates a 2.73% chance of exploitation in the next 30 days.

Description

The net/http library in net/http/transfer.go in Go before 1.4.3 does not properly parse HTTP headers, which allows remote attackers to conduct HTTP request smuggling attacks via a request that contains Content-Length and Transfer-Encoding header fields.

Metrics

CVSS 3.1

9.8/10

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

EPSS Probability

2.73%

84.2th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-444

Affected Software

Vendor	Product	Versions
Golang	Go	< 1.4.3
Redhat	Openstack	7.0
Redhat	Openstack	8
Redhat	Enterprise Linux	7.0

References

http://lists.fedoraproject.org/pipermail/package-announce/2015-October/167997.htmlMailing List, Patch, Third Party Advisory
http://lists.fedoraproject.org/pipermail/package-announce/2015-October/168029.htmlMailing List, Patch, Third Party Advisory
http://seclists.org/oss-sec/2015/q3/237Mailing List, Third Party Advisory
http://seclists.org/oss-sec/2015/q3/292Mailing List, Third Party Advisory
http://seclists.org/oss-sec/2015/q3/294Mailing List, Third Party Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=1250352Issue Tracking, Patch, Third Party Advisory
https://github.com/golang/go/commit/300d9a21583e7cf0149a778a0611e76ff7c6680fPatch, Third Party Advisory
http://lists.fedoraproject.org/pipermail/package-announce/2015-October/167997.htmlMailing List, Patch, Third Party Advisory
http://lists.fedoraproject.org/pipermail/package-announce/2015-October/168029.htmlMailing List, Patch, Third Party Advisory
http://seclists.org/oss-sec/2015/q3/237Mailing List, Third Party Advisory
http://seclists.org/oss-sec/2015/q3/292Mailing List, Third Party Advisory
http://seclists.org/oss-sec/2015/q3/294Mailing List, Third Party Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=1250352Issue Tracking, Patch, Third Party Advisory
https://github.com/golang/go/commit/300d9a21583e7cf0149a778a0611e76ff7c6680fPatch, Third Party Advisory

Timeline

Published: Feb 8, 2020
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2015-5741?

How severe is CVE-2015-5741?

CVE-2015-5741 has a CVSS score of 9.8/10 (CRITICAL severity). The EPSS model estimates a 2.73% probability of exploitation in the next 30 days.

How do I fix CVE-2015-5741?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2015-5741?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST