SOC status:Duty analyst on shift

UK Cyber Defence
VulnerabilityModified

CVE-2018-18311

Perl before 5.26.3 and 5.28.x before 5.28.1 has a buffer overflow via a crafted regular expression that triggers invalid write operations.

CRITICAL 9.8EPSS 11.7%

Does this matter?

EPSS puts the probability of exploitation in the next 30 days at 11.7%, higher than 96% of all known CVEs. Patch or mitigate before the next change window.

Description

Perl before 5.26.3 and 5.28.x before 5.28.1 has a buffer overflow via a crafted regular expression that triggers invalid write operations.

CVSS 3.0
9.8 CRITICALCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
EPSS
11.68% probability · 96th percentile
Public exploits
None in Exploit-DB
CISA KEV
Not listed
Weakness
CWE-190, CWE-787
Affected
perl/perl · canonical/ubuntu linux · debian/debian linux · netapp/e-series santricity os controller · netapp/snap creator framework · netapp/snapcenter · netapp/snapdriver · redhat/openshift container platform · redhat/enterprise linux · redhat/enterprise linux desktop · redhat/enterprise linux eus · redhat/enterprise linux server · redhat/enterprise linux server aus · redhat/enterprise linux server tus · redhat/enterprise linux workstation · apple/mac os x · fedoraproject/fedora · mcafee/web gateway
Source
cve@mitre.org
EPSS trend
0%8%15%27 October 2026: 11.68%27 October 202627 October 2026

EPSS 11.7% 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

Source: NVD record, EPSS from FIRST.org, KEV from CISA, exploits from Exploit-DB. Refreshed daily. Download this record as JSON.