CVE-2018-16843
nginx before versions 1.15.6 and 1.14.1 has a vulnerability in the implementation of HTTP/2 that can allow for excessive memory consumption.
Does this matter?
EPSS puts the probability of exploitation in the next 30 days at 48.0%, higher than 99% 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 memory consumption. 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
- 47.98% probability · 99th percentile
- Public exploits
- None in Exploit-DB
- CISA KEV
- Not listed
- Weakness
- CWE-400
- Affected
- f5/nginx · debian/debian linux · canonical/ubuntu linux · opensuse/leap · apple/xcode
- Source
- secalert@redhat.com
EPSS 48.0% 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.htmlMailing List, Third 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-2018:3653Third Party Advisory
- 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-2018-16843Issue Tracking, Third Party Advisory
- 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.htmlMailing List, Third 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-2018:3653Third Party Advisory
- 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-2018-16843Issue Tracking, Third Party Advisory
- 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.