CVE-2017-10868

Name: CVE-2017-10868
Creator: NVD / NIST
Published: 2017-12-22T14:29:12.487+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 7.5/10EPSS 3.47%

Last modified Jun 17, 2026

CVE-2017-10868 is a high-severity vulnerability rated 7.5/10 on the CVSS scale. H2O version 2.2.2 and earlier allows remote attackers to cause a denial of service in the server via specially crafted HTTP/1 header.. EPSS estimates a 3.47% chance of exploitation in the next 30 days.

Description

H2O version 2.2.2 and earlier allows remote attackers to cause a denial of service in the server via specially crafted HTTP/1 header.

Metrics

CVSS 3.1

7.5/10

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

EPSS Probability

3.47%

87.6th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-20

Affected Software

Vendor	Product	Versions
Dena	H2o	< 2.2.3

References

https://github.com/h2o/h2o/issues/1459Third Party Advisory
https://jvn.jp/en/jp/JVN84182676/index.htmlThird Party Advisory, VDB Entry
https://github.com/h2o/h2o/issues/1459Third Party Advisory
https://jvn.jp/en/jp/JVN84182676/index.htmlThird Party Advisory, VDB Entry

Timeline

Published: Dec 22, 2017
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2017-10868?

H2O version 2.2.2 and earlier allows remote attackers to cause a denial of service in the server via specially crafted HTTP/1 header.

How severe is CVE-2017-10868?

CVE-2017-10868 has a CVSS score of 7.5/10 (HIGH severity). The EPSS model estimates a 3.47% probability of exploitation in the next 30 days.

How do I fix CVE-2017-10868?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2017-10868?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST