Well-crafted inputs reaching ParseAddress, ParseAddressList, and ParseDate were able to trigger excessive CPU exhaustion and memory allocations.

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Advisories

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Fixes

Solution

No solution given by the vendor.


Workaround

No workaround given by the vendor.

References
Link Providers
https://access.redhat.com/errata/RHSA-2026:23262 cve-icon
https://access.redhat.com/errata/RHSA-2026:23264 cve-icon
https://access.redhat.com/errata/RHSA-2026:33120 cve-icon
https://access.redhat.com/errata/RHSA-2026:33123 cve-icon
https://access.redhat.com/errata/RHSA-2026:33142 cve-icon
https://access.redhat.com/errata/RHSA-2026:33150 cve-icon
https://access.redhat.com/errata/RHSA-2026:33574 cve-icon
https://access.redhat.com/errata/RHSA-2026:34364 cve-icon
https://access.redhat.com/errata/RHSA-2026:36319 cve-icon
https://access.redhat.com/errata/RHSA-2026:36625 cve-icon
https://access.redhat.com/errata/RHSA-2026:36754 cve-icon
https://access.redhat.com/errata/RHSA-2026:36797 cve-icon
https://access.redhat.com/errata/RHSA-2026:40262 cve-icon
https://access.redhat.com/errata/RHSA-2026:41031 cve-icon
https://access.redhat.com/errata/RHSA-2026:41066 cve-icon
https://access.redhat.com/errata/RHSA-2026:41928 cve-icon
https://access.redhat.com/errata/RHSA-2026:42146 cve-icon
https://access.redhat.com/errata/RHSA-2026:42644 cve-icon
https://access.redhat.com/errata/RHSA-2026:42796 cve-icon
https://access.redhat.com/errata/RHSA-2026:43038 cve-icon
https://access.redhat.com/errata/RHSA-2026:43052 cve-icon
https://access.redhat.com/errata/RHSA-2026:43692 cve-icon
https://access.redhat.com/errata/RHSA-2026:47952 cve-icon
https://access.redhat.com/errata/RHSA-2026:50205 cve-icon
https://access.redhat.com/errata/RHSA-2026:50300 cve-icon
https://access.redhat.com/errata/RHSA-2026:50843 cve-icon
https://access.redhat.com/errata/RHSA-2026:51033 cve-icon
https://access.redhat.com/errata/RHSA-2026:54283 cve-icon
https://access.redhat.com/errata/RHSA-2026:54285 cve-icon
https://access.redhat.com/errata/RHSA-2026:54287 cve-icon
https://access.redhat.com/security/cve/CVE-2026-39820 cve-icon
https://bugzilla.redhat.com/show_bug.cgi?id=2467820 cve-icon
https://go.dev/cl/759940 cve-icon cve-icon
https://go.dev/issue/78566 cve-icon cve-icon
https://groups.google.com/g/golang-announce/c/qcCIEXso47M cve-icon cve-icon
https://pkg.go.dev/vuln/GO-2026-4986 cve-icon cve-icon
https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-39820.json cve-icon
History

Wed, 12 Aug 2026 12:30:00 +0000


Wed, 13 May 2026 15:30:00 +0000

Type Values Removed Values Added
First Time appeared Golang
Golang go
Weaknesses CWE-770
CPEs cpe:2.3:a:golang:go:*:*:*:*:*:*:*:*
Vendors & Products Golang
Golang go

Fri, 08 May 2026 21:00:00 +0000

Type Values Removed Values Added
Weaknesses CWE-739

Fri, 08 May 2026 15:15:00 +0000

Type Values Removed Values Added
Metrics cvssV3_1

{'score': 7.5, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H'}

ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}


Thu, 07 May 2026 21:45:00 +0000

Type Values Removed Values Added
First Time appeared Go Standard Library
Go Standard Library net/mail
Weaknesses CWE-739
Vendors & Products Go Standard Library
Go Standard Library net/mail

Thu, 07 May 2026 20:00:00 +0000

Type Values Removed Values Added
Description Well-crafted inputs reaching ParseAddress, ParseAddressList, and ParseDate were able to trigger excessive CPU exhaustion and memory allocations.
Title Quadratic string concatentation in consumeComment in net/mail
References

Projects

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cve-icon MITRE

Status: PUBLISHED

Assigner: Go

Published:

Updated: 2026-08-12T12:04:44.958Z

Reserved: 2026-04-07T18:13:03.526Z

Link: CVE-2026-39820

cve-icon Vulnrichment

Updated: 2026-08-12T12:04:44.958Z

cve-icon NVD

Status : Modified

Published: 2026-05-07T20:16:43.187

Modified: 2026-08-12T12:18:58.337

Link: CVE-2026-39820

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-05-13T16:30:36Z

Weaknesses