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Vulnerability details: VCID-e3jc-83a7-8uhh
Vulnerability ID VCID-e3jc-83a7-8uhh
Aliases CVE-2018-11763
Summary By sending continous SETTINGS frames of maximum size an ongoing HTTP/2 connection could be kept busy and would never time out. This can be abused for a DoS on the server. This only affect a server that has enabled the h2 protocol.
Status Published
Exploitability 0.5
Weighted Severity 6.8
Risk 3.4
Affected and Fixed Packages Package Details
Weaknesses (1)
CWE-20 Improper Input Validation
System Score Found at
cvssv3 7.5 https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2018-11763.json
epss 0.17401 https://api.first.org/data/v1/epss?cve=CVE-2018-11763
epss 0.17401 https://api.first.org/data/v1/epss?cve=CVE-2018-11763
epss 0.17401 https://api.first.org/data/v1/epss?cve=CVE-2018-11763
epss 0.17401 https://api.first.org/data/v1/epss?cve=CVE-2018-11763
epss 0.17401 https://api.first.org/data/v1/epss?cve=CVE-2018-11763
epss 0.17401 https://api.first.org/data/v1/epss?cve=CVE-2018-11763
epss 0.17401 https://api.first.org/data/v1/epss?cve=CVE-2018-11763
epss 0.17401 https://api.first.org/data/v1/epss?cve=CVE-2018-11763
epss 0.17401 https://api.first.org/data/v1/epss?cve=CVE-2018-11763
epss 0.17401 https://api.first.org/data/v1/epss?cve=CVE-2018-11763
cvssv3 7.5 https://ftp.suse.com/pub/projects/security/yaml/suse-cvss-scores.yaml
apache_httpd low https://httpd.apache.org/security/json/CVE-2018-11763.json
Reference id Reference type URL
https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2018-11763.json
https://api.first.org/data/v1/epss?cve=CVE-2018-11763
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-11763
https://ftp.suse.com/pub/projects/security/yaml/suse-cvss-scores.yaml
1633399 https://bugzilla.redhat.com/show_bug.cgi?id=1633399
909591 https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=909591
CVE-2018-11763 https://httpd.apache.org/security/json/CVE-2018-11763.json
RHSA-2019:0366 https://access.redhat.com/errata/RHSA-2019:0366
RHSA-2019:0367 https://access.redhat.com/errata/RHSA-2019:0367
USN-3783-1 https://usn.ubuntu.com/3783-1/
No exploits are available.
Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H Found at https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2018-11763.json
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H Found at https://ftp.suse.com/pub/projects/security/yaml/suse-cvss-scores.yaml
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Exploit Prediction Scoring System (EPSS)
Percentile 0.95033
EPSS Score 0.17401
Published At April 1, 2026, 12:55 p.m.
Date Actor Action Source VulnerableCode Version
2026-04-01T12:36:21.825406+00:00 Apache HTTPD Importer Import https://httpd.apache.org/security/json/CVE-2018-11763.json 38.0.0