The email-ingestion feature in Best Practical Request Tracker 4.1.13 through 4.4 allows denial of service by remote attackers via an algori…

published 2019-03-17 7 y ago modified 2026-06-17 4 mo ago also EUVD-2018-10608

cvss: 7.5; version 3.1, NVD
cisa kev: Not listed; not in CISA's catalog
epss: 2.4%; EPSS 2.4% chance of exploitation in 30 days, percentile 83%
public exploits: 0; none known

The email-ingestion feature in Best Practical Request Tracker 4.1.13 through 4.4 allows denial of service by remote attackers via an algorithmic complexity attack on email address parsing.

Patch / fix

distros 3

debian ubuntu alpine

libemail-address-list-perl Debian 14, Debian 13, Debian 12 0.06-1

debian advisories DEBIAN-CVE-2018-18898

libemail-address-list-perl Ubuntu 16.04 LTS 0.05-1+deb9u1build0.16.04.1
libemail-address-list-perl Ubuntu 18.04 LTS 0.05-1+deb9u1build0.18.04.1
libemail-address-list-perl Ubuntu 20.04 LTS 0.06-1

ubuntu advisories UBUNTU-CVE-2018-18898

Ubuntu security data © Canonical Ltd., from https://github.com/canonical/ubuntu-security-notices via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

perl-email-address-list Alpine 3.24, Alpine 3.23, Alpine 3.22 +12 more 0.06-r0

alpine advisories ALPINE-CVE-2018-18898

Alpine secdb © Alpine Linux, from https://secdb.alpinelinux.org via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

Exploit prediction

2.36% chance of exploitation in the next 30 days, higher than 83% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by	version	score	vector
NVD	3.1	7.5	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
NVD	2.0	5.0	AV:N/AC:L/Au:N/C:N/I:N/A:P

Classification

Weakness

CWE-400 Uncontrolled Resource Consumption

References

lists.fedoraproject.org /archives/list/package-announce%40lists.fedoraproject.org/message/CPJVDT77ZPRU5Z2BEMZM7EBY6WZHUATZ/
vendor-advisory
lists.fedoraproject.org /archives/list/package-announce%40lists.fedoraproject.org/message/YR46PPHBEM76DNN4DEQMAYIKLCO3TQU2/
vendor-advisory
usn.ubuntu.com /4517-1/
vendor-advisory, third-party-advisory
bestpractical.com /download-page
product, release-notes
lists.debian.org /debian-lts-announce/2020/02/msg00009.html
mailing-list, third-party-advisory

Sources

CVE List CVE-2018-18898
NVD CVE-2018-18898

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

Summary