VulnerabilityModified
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.
HIGH 7.5EPSS 3.53%
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (3.53%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
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.
- CVSS 3.1
- 7.5 HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- EPSS
- 3.53% probability · 89th percentile
- Public exploits
- None in Exploit-DB
- CISA KEV
- Not listed
- Weakness
- CWE-20
- Affected
- dena/h2o
- Source
- vultures@jpcert.or.jp
EPSS 3.5% since 27 October 2026; no change recorded yet. Points are recorded when the score first appears and whenever it moves by a percentage point or more.
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
Source: NVD record, EPSS from FIRST.org, KEV from CISA, exploits from Exploit-DB. Refreshed daily. Download this record as JSON.