LOW
CRLF injection vulnerability in the on_req function in lib/handler/redirect.c in H2O before 1.6.2 and 1.7.x before 1.7.0-beta3 allows remote attackers to inject arbitrary HTTP headers and conduct HTTP response splitting attacks via a crafted URI
Published Jan 16, 2016
3.7
LOWCVSS 3.0
EPSS 1.46%
Description
CRLF injection vulnerability in the on_req function in lib/handler/redirect.c in H2O before 1.6.2 and 1.7.x before 1.7.0-beta3 allows remote attackers to inject arbitrary HTTP headers and conduct HTTP response splitting attacks via a crafted URI.
Affected products
Remediation
No remediation recorded yet.
Metrics
No CVSS v4.0 score for this CVE.
No CVSS v3.1 score for this CVE.
3.7 LOW NVD
CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:N
Attack Vector Network
Attack Complexity High
Privileges Required None
User Interaction None
Scope Unchanged
Confidentiality Impact None
Integrity Impact Low
Availability Impact None
4.3 MEDIUM NVD
AV:N/AC:M/Au:N/C:N/I:P/A:N
Access Vector Network
Access Complexity Medium
Authentication None
Confidentiality Impact None
Integrity Impact Partial
Availability Impact None
This CVE is not in the KEV list.
No CISA SSVC assessment for this CVE yet.
1.46% 0.01459
Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 1, 2026.
EPSS probability 0.01459
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 (10 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 1, 2026 | 1.46% (0.01459) | 72.60th | v5 (v2026.06.15) |
| Jun 15, 2026 | 1.46% (0.01459) | 70.05th | v5 (v2026.06.15) |
| Mar 17, 2025 | 0.44% (0.00439) | 60.97th | v4 (v2025.03.14) |
| Dec 12, 2024 | 0.47% (0.00466) | 76.31th | v3 (v2023.03.01) |
| Feb 8, 2024 | 0.47% (0.00466) | 74.75th | v3 (v2023.03.01) |
| Mar 7, 2023 | 0.47% (0.00466) | 71.66th | v3 (v2023.03.01) |
| Mar 6, 2023 | 1.21% (0.01213) | 66.61th | v2 (v2022.01.01) |
| Feb 17, 2023 | 1.21% (0.01213) | 66.22th | v2 (v2022.01.01) |
| Apr 1, 2022 | 1.21% (0.01213) | 64.21th | v2 (v2022.01.01) |
| Feb 4, 2022 | 1.21% (0.01213) | 40.54th | v2 (v2022.01.01) |
Weaknesses (0)
No CWE recorded.
References (5)
- http://jvn.jp/en/jp/JVN45928828/index.html third-party-advisoryx_refsource_JVNVendor Advisory
- http://jvndb.jvn.jp/jvndb/JVNDB-2016-000003 third-party-advisoryx_refsource_JVNDBVendor Advisory
- https://github.com/h2o/h2o/issues/682 x_refsource_CONFIRM
- https://github.com/h2o/h2o/issues/684 x_refsource_CONFIRM
- https://h2o.examp1e.net/vulnerabilities.html#CVE-2016-1133 x_refsource_CONFIRM
| Link | Providers | Tags |
|---|---|---|
| http://jvn.jp/en/jp/JVN45928828/index.html | third-party-advisoryx_refsource_JVNVendor Advisory | |
| http://jvndb.jvn.jp/jvndb/JVNDB-2016-000003 | third-party-advisoryx_refsource_JVNDBVendor Advisory | |
| https://github.com/h2o/h2o/issues/682 | x_refsource_CONFIRM | |
| https://github.com/h2o/h2o/issues/684 | x_refsource_CONFIRM | |
| https://h2o.examp1e.net/vulnerabilities.html#CVE-2016-1133 | x_refsource_CONFIRM |
Change history (0)
No recorded changes yet.
Sources
CVE.org / MITRE
Status PUBLISHED
Assigner jpcert
Published Jan 16, 2016
Updated Aug 5, 2024
Reserved Dec 26, 2015
Link CVE-2016-1133
CISA Vulnrichment
Updated n/a