CRITICAL
golang: HTTP request smuggling in net/http library
Published Oct 18, 2017
9.8
CRITICALCVSS 3.0
EPSS 3.66%
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 with two Content-length headers.
Affected products
No data.
Configuration 2
OR
- 21
- 22
Configuration 3
OR
- 7.0
- 7.2
- 7.3
- 7.4
- 7.6
- 7.2
- 7.3
- 7.4
- 7.5
- 7.6
- 7.2
- 7.3
- 7.6
No data.
Red Hat Enterprise Linux 7
golang-0:1.6.3-1.el7_2.1
Fixed · RHSA-2016:1538
Red Hat Enterprise Linux OpenStack Platform 7 (Kilo) Operational Tools
golang
Will not fix
Red Hat OpenStack Platform 8 (Liberty) Operational Tools
golang
Will not fix
| Product | Package | State | Advisory |
|---|---|---|---|
| Red Hat Enterprise Linux 7 | golang-0:1.6.3-1.el7_2.1 | Fixed | RHSA-2016:1538 |
| Red Hat Enterprise Linux OpenStack Platform 7 (Kilo) Operational Tools | golang | Will not fix | n/a |
| Red Hat OpenStack Platform 8 (Liberty) Operational Tools | golang | Will not fix | n/a |
stdlib
Go
Introduced 0 Fixed 1.4.3
| Ecosystem | Package | Introduced | Fixed |
|---|---|---|---|
| Go | stdlib | 0 | 1.4.3 |
Remediation
No remediation recorded yet.
Metrics
No CVSS v4.0 score for this CVE.
No CVSS v3.1 score for this CVE.
9.8 CRITICAL NVD
CVSS:3.0/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
7.5 HIGH NVD
AV:N/AC:L/Au:N/C:P/I:P/A:P
Access Vector Network
Access Complexity Low
Authentication None
Confidentiality Impact Partial
Integrity Impact Partial
Availability Impact Partial
This CVE is not in the KEV list.
No CISA SSVC assessment for this CVE yet.
3.66% 0.03657
Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 1, 2026.
EPSS probability 0.03657
Score over time
2022–2026- EPSS v2
- EPSS v3
- EPSS v4
- EPSS v5
Percentile over time
- EPSS v2
- EPSS v3
- EPSS v4
- EPSS v5
Table of values (37 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 1, 2026 | 3.66% (0.03657) | 89.26th | v5 (v2026.06.15) |
| Jun 15, 2026 | 3.66% (0.03657) | 88.14th | v5 (v2026.06.15) |
| Mar 4, 2026 | 4.27% (0.04273) | 88.61th | v4 (v2025.03.14) |
| Mar 1, 2026 | 1.91% (0.01908) | 83.07th | v4 (v2025.03.14) |
| Feb 4, 2026 | 4.27% (0.04273) | 88.55th | v4 (v2025.03.14) |
| Feb 1, 2026 | 1.91% (0.01908) | 82.95th | v4 (v2025.03.14) |
| Jan 8, 2026 | 4.27% (0.04273) | 88.48th | v4 (v2025.03.14) |
| Jan 4, 2026 | 5.69% (0.05691) | 90.12th | v4 (v2025.03.14) |
| Jan 1, 2026 | 1.91% (0.01908) | 82.90th | v4 (v2025.03.14) |
| Dec 4, 2025 | 6.04% (0.06044) | 90.35th | v4 (v2025.03.14) |
| Dec 1, 2025 | 2.03% (0.02033) | 83.32th | v4 (v2025.03.14) |
| Nov 4, 2025 | 6.04% (0.06044) | 90.31th | v4 (v2025.03.14) |
| Nov 1, 2025 | 2.03% (0.02033) | 83.27th | v4 (v2025.03.14) |
| Oct 4, 2025 | 6.04% (0.06044) | 90.34th | v4 (v2025.03.14) |
| Oct 1, 2025 | 2.03% (0.02033) | 83.21th | v4 (v2025.03.14) |
| Sep 5, 2025 | 6.04% (0.06044) | 90.38th | v4 (v2025.03.14) |
| Sep 1, 2025 | 2.03% (0.02033) | 83.17th | v4 (v2025.03.14) |
| Aug 4, 2025 | 6.04% (0.06044) | 90.38th | v4 (v2025.03.14) |
| Aug 1, 2025 | 2.03% (0.02033) | 83.15th | v4 (v2025.03.14) |
| Jul 4, 2025 | 6.04% (0.06044) | 90.30th | v4 (v2025.03.14) |
| Jul 1, 2025 | 2.03% (0.02033) | 83.05th | v4 (v2025.03.14) |
| Jun 4, 2025 | 6.04% (0.06044) | 90.24th | v4 (v2025.03.14) |
| Jun 1, 2025 | 2.03% (0.02033) | 82.96th | v4 (v2025.03.14) |
| May 4, 2025 | 6.04% (0.06044) | 90.20th | v4 (v2025.03.14) |
| May 1, 2025 | 2.14% (0.02140) | 83.31th | v4 (v2025.03.14) |
| Mar 30, 2025 | 6.34% (0.06344) | 90.04th | v4 (v2025.03.14) |
| Mar 29, 2025 | 8.49% (0.08489) | 87.06th | v4 (v2025.03.14) |
| Mar 17, 2025 | 6.34% (0.06344) | 90.29th | v4 (v2025.03.14) |
| Dec 12, 2024 | 1.37% (0.01373) | 86.85th | v3 (v2023.03.01) |
| May 18, 2024 | 1.37% (0.01373) | 86.25th | v3 (v2023.03.01) |
| May 8, 2023 | 1.37% (0.01373) | 84.24th | v3 (v2023.03.01) |
| Mar 11, 2023 | 2.00% (0.02002) | 87.06th | v3 (v2023.03.01) |
| Mar 7, 2023 | 2.19% (0.02185) | 87.61th | v3 (v2023.03.01) |
| Mar 6, 2023 | 1.41% (0.01408) | 72.89th | v2 (v2022.01.01) |
| Mar 2, 2023 | 1.41% (0.01408) | 72.88th | v2 (v2022.01.01) |
| Apr 1, 2022 | 1.41% (0.01408) | 70.87th | v2 (v2022.01.01) |
| Feb 4, 2022 | 1.41% (0.01408) | 49.94th | v2 (v2022.01.01) |
Weaknesses (1)
References (11)
- http://lists.fedoraproject.org/pipermail/package-announce/2015-October/167997.html vendor-advisoryx_refsource_FEDORAThird Party Advisory
- http://lists.fedoraproject.org/pipermail/package-announce/2015-October/168029.html vendor-advisoryx_refsource_FEDORAThird Party Advisory
- http://rhn.redhat.com/errata/RHSA-2016-1538.html vendor-advisoryx_refsource_REDHATThird Party Advisory
- http://seclists.org/oss-sec/2015/q3/237 mailing-listx_refsource_MLISTMailing ListThird Party Advisory
- http://seclists.org/oss-sec/2015/q3/292 mailing-listx_refsource_MLISTMailing ListThird Party Advisory
- http://seclists.org/oss-sec/2015/q3/294 mailing-listx_refsource_MLISTMailing ListThird Party Advisory
- https://access.redhat.com/security/cve/CVE-2015-5740 Vendor Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=1250352 x_refsource_CONFIRMIssue TrackingPatchThird Party Advisory
- https://github.com/golang/go/commit/300d9a21583e7cf0149a778a0611e76ff7c6680f x_refsource_CONFIRMIssue TrackingPatchThird Party Advisory
- https://nvd.nist.gov/vuln/detail/CVE-2015-5740
- https://www.cve.org/CVERecord?id=CVE-2015-5740
Change history (0)
No recorded changes yet.
Sources
CVE.org / MITRE
Status PUBLISHED
Assigner mitre
Published Oct 18, 2017
Updated Aug 6, 2024
Reserved Aug 5, 2015
Link CVE-2015-5740
CISA Vulnrichment
Updated n/a