CVE-2018-16844
nginx before versions 1.15.6 and 1.14.1 has a vulnerability in the implementation of HTTP/2 that can allow for excessive CPU usage.
Does this matter?
EPSS puts the probability of exploitation in the next 30 days at 12.7%, higher than 96% of all known CVEs. Patch or mitigate before the next change window.
Description
nginx before versions 1.15.6 and 1.14.1 has a vulnerability in the implementation of HTTP/2 that can allow for excessive CPU usage. This issue affects nginx compiled with the ngx_http_v2_module (not compiled by default) if the 'http2' option of the 'listen' directive is used in a configuration file.
- 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
- 12.73% probability · 96th percentile
- Public exploits
- None in Exploit-DB
- CISA KEV
- Not listed
- Weakness
- CWE-400
- Affected
- f5/nginx · debian/debian linux · canonical/ubuntu linux · apple/xcode
- Source
- secalert@redhat.com
EPSS 12.7% since 27 October 2026; no change recorded yet. The dashed line is the ten per cent mark our analysts treat as “patch before the next change window”. Points are recorded when the score first appears and whenever it moves by a percentage point or more.
References
- http://lists.opensuse.org/opensuse-security-announce/2019-09/msg00035.htmlThird Party Advisory
- http://mailman.nginx.org/pipermail/nginx-announce/2018/000220.htmlMailing List, Vendor Advisory
- http://seclists.org/fulldisclosure/2021/Sep/36Mailing List, Third Party Advisory
- http://www.securityfocus.com/bid/105868Third Party Advisory, VDB Entry
- http://www.securitytracker.com/id/1042038Third Party Advisory, VDB Entry
- https://access.redhat.com/errata/RHSA-2018:3680Third Party Advisory
- https://access.redhat.com/errata/RHSA-2018:3681Third Party Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2018-16844Issue Tracking
- https://support.apple.com/kb/HT212818Third Party Advisory
- https://usn.ubuntu.com/3812-1/Third Party Advisory
- https://www.debian.org/security/2018/dsa-4335Third Party Advisory
- http://lists.opensuse.org/opensuse-security-announce/2019-09/msg00035.htmlThird Party Advisory
- http://mailman.nginx.org/pipermail/nginx-announce/2018/000220.htmlMailing List, Vendor Advisory
- http://seclists.org/fulldisclosure/2021/Sep/36Mailing List, Third Party Advisory
- http://www.securityfocus.com/bid/105868Third Party Advisory, VDB Entry
- http://www.securitytracker.com/id/1042038Third Party Advisory, VDB Entry
- https://access.redhat.com/errata/RHSA-2018:3680Third Party Advisory
- https://access.redhat.com/errata/RHSA-2018:3681Third Party Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2018-16844Issue Tracking
- https://support.apple.com/kb/HT212818Third Party Advisory
- https://usn.ubuntu.com/3812-1/Third Party Advisory
- https://www.debian.org/security/2018/dsa-4335Third Party Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA, exploits from Exploit-DB. Refreshed daily. Download this record as JSON.