Critical 9.8Published Dec 7, 2018

CVE-2018-18311Perl 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.

Updated under an hour ago (Nov 2, 2026, 12:20 AM ET)

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It affects perl and 17 other products. Add what you run to find out whether that includes you.

No exploitation reported and no EPSS estimate yet.

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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: 9.8 CRITICAL (v3.0, NVD)CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Weakness (CWE): CWE-190, CWE-787
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: Not given
NVD analysis: Modified
Record last updated: Jun 16, 2026
First seen by InfoSec Signals: Nov 1, 2026

Affected products

Affected products

perl perl perl:perl	before 5.26.3; from 5.28.0 before 5.28.1	NVD
canonical ubuntu_linux canonical:ubuntu_linux	12.04; 14.04; 16.04; 18.04; 18.10	NVD
debian debian_linux debian:debian_linux	8.0; 9.0	NVD
netapp e-series_santricity_os_controller netapp:e-series_santricity_os_controller	all versions	NVD
netapp snap_creator_framework netapp:snap_creator_framework	all versions	NVD
netapp snapcenter netapp:snapcenter	all versions	NVD
netapp snapdriver netapp:snapdriver	all versions	NVD
redhat openshift_container_platform redhat:openshift_container_platform	3.11	NVD
redhat enterprise_linux redhat:enterprise_linux	6.0; 7.0; 7.4; 7.5; 7.6	NVD
redhat enterprise_linux_desktop redhat:enterprise_linux_desktop	7.0	NVD
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References

References

http://seclists.org/fulldisclosure/2019/Mar/49	mailing-list, third-party-advisory
http://www.securityfocus.com/bid/106145	third-party-advisory, vdb-entry
http://www.securitytracker.com/id/1042181	third-party-advisory, vdb-entry
https://access.redhat.com/errata/RHBA-2019:0327	third-party-advisory
https://access.redhat.com/errata/RHSA-2019:0001	third-party-advisory
https://access.redhat.com/errata/RHSA-2019:0010	third-party-advisory
https://access.redhat.com/errata/RHSA-2019:0109	third-party-advisory
https://access.redhat.com/errata/RHSA-2019:1790
https://access.redhat.com/errata/RHSA-2019:1942
https://access.redhat.com/errata/RHSA-2019:2400
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The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.