What’s Vulnerable › Vulnerabilities

CVE-2015-5741

• Severity: critical (CVSS 9.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 2.7% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2020-02-08 · updated 2026-06-17
• Weakness: CWE-444

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.

Affected products

• Go: before 1.4.3 — fixed in 1.4.3
• Red Hat Enterprise Linux: 7.0
• OpenStack: 7.0, 8

How to fix

Upgrade to a fixed version: Go 1.4.3. Check the vendor advisory for mitigations.

References

• http://lists.fedoraproject.org/pipermail/package-announce/2015-October/167997.html
• http://lists.fedoraproject.org/pipermail/package-announce/2015-October/168029.html
• http://seclists.org/oss-sec/2015/q3/237
• http://seclists.org/oss-sec/2015/q3/292
• http://seclists.org/oss-sec/2015/q3/294
• https://bugzilla.redhat.com/show_bug.cgi?id=1250352
• https://github.com/golang/go/commit/300d9a21583e7cf0149a778a0611e76ff7c6680f
• http://lists.fedoraproject.org/pipermail/package-announce/2015-October/167997.html
• http://lists.fedoraproject.org/pipermail/package-announce/2015-October/168029.html
• http://seclists.org/oss-sec/2015/q3/237
• http://seclists.org/oss-sec/2015/q3/292
• http://seclists.org/oss-sec/2015/q3/294

Get alerted when CVE-2015-5741 or the next vulnerability affects your stack