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CVE-2016-1133
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…
Low3.7EPSS 1.5%
- Published
- Updated
- Reserved
- Assigned by
- jpcert
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.
Timeline
ID reserved
By jpcert
- 21 days later
· 21 days later
Published
- 9 years later
· 9 years later
Record updated
Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| NVDNVD · Modified | 3.0 | Low3.7 | CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:N |
- EPSS (exploitation in 30 days)
- 1.5% · top 26% of all CVEs (8 Nov 2026)
Loading the EPSS history…
The list uses the assigner's score when there is one, then CISA's, then NVD's: Low 3.7.
Weakness
- n/a
Affected products
n/a
- affected n/a
References (5)
- https://github.com/h2o/h2o/issues/682 (opens in a new tab)x_refsource_CONFIRMx_transferred
- https://github.com/h2o/h2o/issues/684 (opens in a new tab)x_refsource_CONFIRMx_transferred
- JVNDB-2016-000003 (opens in a new tab)third-party-advisoryx_refsource_JVNDBx_transferred
- JVN#45928828 (opens in a new tab)third-party-advisoryx_refsource_JVNx_transferred
- https://h2o.examp1e.net/vulnerabilities.html#CVE-2016-1133 (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://cveledger.app/cve/CVE-2016-1133)Record last updated .