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CVE-2015-5739
The net/http library in net/textproto/reader.go in Go before 1.4.3 does not properly parse HTTP header keys, which allows remote attackers…
Critical9.8EPSS 9.6%
- Published
- Updated
- Reserved
- Assigned by
- mitre
Description
The net/http library in net/textproto/reader.go in Go before 1.4.3 does not properly parse HTTP header keys, which allows remote attackers to conduct HTTP request smuggling attacks via a space instead of a hyphen, as demonstrated by "Content Length" instead of "Content-Length."
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| NVDNVD · Modified | 3.0 | Critical9.8 | CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
- EPSS (exploitation in 30 days)
- 9.6% · top 4.5% of all CVEs (5 Nov 2026)
Loading the EPSS history…
The list uses the assigner's score when there is one, then CISA's, then NVD's: Critical 9.8.
Weakness
Affected products
n/a
- affected n/a
References (9)
- [oss-security] 20150804 CVE Request - Go net/http library - HTTP smuggling (opens in a new tab)mailing-listx_refsource_MLISTx_transferred
- FEDORA-2015-15619 (opens in a new tab)vendor-advisoryx_refsource_FEDORAx_transferred
- FEDORA-2015-15618 (opens in a new tab)vendor-advisoryx_refsource_FEDORAx_transferred
- RHSA-2016:1538 (opens in a new tab)vendor-advisoryx_refsource_REDHATx_transferred
- https://bugzilla.redhat.com/show_bug.cgi?id=1250352 (opens in a new tab)x_refsource_CONFIRMx_transferred
- [oss-security] 20150805 Re: CVE Request - Go net/http library - HTTP smuggling (opens in a new tab)mailing-listx_refsource_MLISTx_transferred
- [oss-security] 20150729 CVE Request - Go net/http library - HTTP smuggling (opens in a new tab)mailing-listx_refsource_MLISTx_transferred
- 76281 (opens in a new tab)vdb-entryx_refsource_BIDx_transferred
- https://github.com/golang/go/commit/117ddcb83d7f42d6aa72241240af99ded81118e9 (opens in a new tab)x_refsource_CONFIRMx_transferred
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://trackcve.app/cve/CVE-2015-5739)Record last updated .