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CVE-2026-42499

Quadratic string concatenation in consumePhrase in net/mail

High7.5EPSS 0.80%
Published
Updated
Reserved
Assigned by
Go

Description

Pathological inputs could cause DoS through consumePhrase when parsing an email address according to RFC 5322.

Scores

CVSS scores of CVE-2026-42499, by who scored it
Scored byCVSSScoreVector
CISA-ADPADP (enrichment)3.1High7.5CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
redhat-SADPADP (enrichment)3.1High7.5CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
NVDNVD · Modified3.1High7.5CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
EPSS (exploitation in 30 days)
0.80% · top 43% of all CVEs (6 Nov 2026)
CISA SSVC
Exploitation: none · Automatable: yes · Technical impact: partial
Loading the EPSS history…

The list uses the assigner's score when there is one, then CISA's, then NVD's: High 7.5.

Weakness

Affected products

References (101)

Sources

The same CVE in the primary databases and aggregators, to check against.

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Record last updated .