CVE-2018-18898

The email-ingestion feature in Best Practical Request Tracker 4.1.13 through 4.4 allows denial of...

7.5 HighFix available

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.

Attack profile

How easy it is to exploit

Attack vector: Network
Complexity: Low
Privileges needed: None
User interaction: None

What an attacker can affect

Confidentiality: None
Integrity: None
Availability: High

Exploit likelihood

2.36%Up 0.4 points since Apr 14, 2021

What each source reports

NVD Score used 7.5

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.

Record: CVE-2018-18898
CVSS 3.1: 7.5 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CVSS 2.0: 5.0 MediumAV:N/AC:L/Au:N/C:N/I:N/A:P
Weakness: CWE-400
Updated: 2026-11-02

CVE List No score

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.

Record: CVE-2018-18898
Updated: 2026-11-02

EUVDEUVD-2018-10608 No score

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.

Record: EUVD-2018-10608
Updated: 2026-11-03

GitHub AdvisoriesGHSA-6rmj-6826-5j8h 7.5

The email-ingestion feature in Best Practical Request Tracker 4.1.13 through 4.4 allows denial of...

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.

Record: GHSA-6rmj-6826-5j8h
CVSS 3.0: 7.5 HighCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Weakness: CWE-400
Updated: 2026-11-02

OSVALPINE-CVE-2018-18898 7.5

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.

Record: ALPINE-CVE-2018-18898
CVSS 3.1: 7.5 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Updated: 2026-11-02

OSV 7.5

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.

Record: CVE-2018-18898
CVSS 3.1: 7.5 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Updated: 2026-11-02

OSVDEBIAN-CVE-2018-18898 7.5

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.

Record: DEBIAN-CVE-2018-18898
CVSS 3.1: 7.5 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Updated: 2026-11-02

OSVUBUNTU-CVE-2018-18898 7.5

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.

Record: UBUNTU-CVE-2018-18898
CVSS 3.1: 7.5 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CVSS 3.0: 7.5 HighCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Updated: 2026-11-02

OSVUSN-4517-1 No score

libemail-address-list-perl vulnerability

It was discovered that Email-Address-List does not properly parse email addresses during email-ingestion. A remote attacker could use this issue to cause an algorithmic complexity attack, resulting in a denial of service. (CVE-2018-18898)

Record: USN-4517-1
Updated: 2026-11-02

Affected products

Affected packages

Affected packages
Package	Affected	Fixed
`perl-email-address-list` Alpine:v3.10	before 0.06-r0	0.06-r0
`perl-email-address-list` Alpine:v3.11	before 0.06-r0	0.06-r0
`perl-email-address-list` Alpine:v3.12	before 0.06-r0	0.06-r0
`perl-email-address-list` Alpine:v3.13	before 0.06-r0	0.06-r0
`perl-email-address-list` Alpine:v3.14	before 0.06-r0	0.06-r0
`perl-email-address-list` Alpine:v3.15	before 0.06-r0	0.06-r0
`perl-email-address-list` Alpine:v3.16	before 0.06-r0	0.06-r0
`perl-email-address-list` Alpine:v3.17	before 0.06-r0	0.06-r0
`perl-email-address-list` Alpine:v3.18	before 0.06-r0	0.06-r0
`perl-email-address-list` Alpine:v3.19	before 0.06-r0	0.06-r0

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Affected packages
Package	Affected	Fixed
`perl-email-address-list` Alpine:v3.20	before 0.06-r0	0.06-r0
`perl-email-address-list` Alpine:v3.21	before 0.06-r0	0.06-r0
`perl-email-address-list` Alpine:v3.22	before 0.06-r0	0.06-r0
`perl-email-address-list` Alpine:v3.23	before 0.06-r0	0.06-r0
`perl-email-address-list` Alpine:v3.24	before 0.06-r0	0.06-r0
`libemail-address-list-perl` Debian:12	before 0.06-1	0.06-1
`libemail-address-list-perl` Debian:13	before 0.06-1	0.06-1
`libemail-address-list-perl` Debian:14	before 0.06-1	0.06-1
`libemail-address-list-perl` Debian:8	before 0.05-1+deb8u1, plus listed versions 0.05-1	0.05-1+deb8u1
`libemail-address-list-perl` Ubuntu:16.04:LTS	before 0.05-1+deb9u1build0.16.04.1, plus listed versions 0.05-1	0.05-1+deb9u1build0.16.04.1
`libemail-address-list-perl` Ubuntu:18.04:LTS	before 0.05-1+deb9u1build0.18.04.1, plus listed versions 0.05-1	0.05-1+deb9u1build0.18.04.1
`libemail-address-list-perl` Ubuntu:20.04:LTS	before 0.06-1	0.06-1

History

History
Recorded	Changed	Sources
Nov 3, 2026	aliases	EUVD
Nov 2, 2026	first indexed	CVE List, GitHub Advisories, NVD, OSV

Dates are when Every CVE recorded each change. Upstream dates may differ.

In short

CVE-2018-18898 is a high vulnerability (CVSS 7.5) in Bestpractical Request Tracker, published March 17, 2019. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 2.36%, the 83rd percentile. Fixed in perl-email-address-list 0.06-r0.

References

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