CVE-2026-39820

Well-crafted inputs reaching ParseAddress, ParseAddressList, and ParseDate were able to trigger excessive CPU exhaustion and memory allocations.
References
Link Resource
https://go.dev/cl/759940 Patch
https://go.dev/issue/78566 Issue Tracking
https://groups.google.com/g/golang-announce/c/qcCIEXso47M Issue Tracking Mailing List
https://pkg.go.dev/vuln/GO-2026-4986 Vendor Advisory
https://access.redhat.com/errata/RHSA-2026:23262
https://access.redhat.com/errata/RHSA-2026:23264
https://access.redhat.com/errata/RHSA-2026:33120
https://access.redhat.com/errata/RHSA-2026:33123
https://access.redhat.com/errata/RHSA-2026:33142
https://access.redhat.com/errata/RHSA-2026:33150
https://access.redhat.com/errata/RHSA-2026:33574
https://access.redhat.com/errata/RHSA-2026:34364
https://access.redhat.com/errata/RHSA-2026:36319
https://access.redhat.com/errata/RHSA-2026:36625
https://access.redhat.com/errata/RHSA-2026:36754
https://access.redhat.com/errata/RHSA-2026:36797
https://access.redhat.com/errata/RHSA-2026:40262
https://access.redhat.com/errata/RHSA-2026:41031
https://access.redhat.com/errata/RHSA-2026:41066
https://access.redhat.com/errata/RHSA-2026:41928
https://access.redhat.com/errata/RHSA-2026:42146
https://access.redhat.com/errata/RHSA-2026:42644
https://access.redhat.com/errata/RHSA-2026:42796
https://access.redhat.com/errata/RHSA-2026:43038
https://access.redhat.com/errata/RHSA-2026:43052
https://access.redhat.com/errata/RHSA-2026:43692
https://access.redhat.com/errata/RHSA-2026:47952
https://access.redhat.com/security/cve/CVE-2026-39820
https://bugzilla.redhat.com/show_bug.cgi?id=2467820
https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-39820.json
Configurations

Configuration 1 (hide)

OR cpe:2.3:a:golang:go:*:*:*:*:*:*:*:*
cpe:2.3:a:golang:go:*:*:*:*:*:*:*:*

History

30 Jul 2026, 12:18

Type Values Removed Values Added
References
  • () https://access.redhat.com/errata/RHSA-2026:47952 -

23 Jul 2026, 12:17

Type Values Removed Values Added
References
  • () https://access.redhat.com/errata/RHSA-2026:43052 -
  • () https://access.redhat.com/errata/RHSA-2026:43692 -

22 Jul 2026, 12:17

Type Values Removed Values Added
References
  • () https://access.redhat.com/errata/RHSA-2026:42796 -
  • () https://access.redhat.com/errata/RHSA-2026:43038 -

21 Jul 2026, 12:18

Type Values Removed Values Added
References
  • () https://access.redhat.com/errata/RHSA-2026:41928 -
  • () https://access.redhat.com/errata/RHSA-2026:42146 -
  • () https://access.redhat.com/errata/RHSA-2026:42644 -

17 Jul 2026, 13:18

Type Values Removed Values Added
References
  • () https://access.redhat.com/errata/RHSA-2026:41031 -
  • () https://access.redhat.com/errata/RHSA-2026:41066 -

16 Jul 2026, 12:17

Type Values Removed Values Added
References
  • () https://access.redhat.com/errata/RHSA-2026:23262 -
  • () https://access.redhat.com/errata/RHSA-2026:23264 -
  • () https://access.redhat.com/errata/RHSA-2026:40262 -

09 Jul 2026, 13:17

Type Values Removed Values Added
References
  • () https://access.redhat.com/errata/RHSA-2026:36754 -
  • () https://access.redhat.com/errata/RHSA-2026:36797 -

08 Jul 2026, 13:16

Type Values Removed Values Added
References
  • () https://access.redhat.com/errata/RHSA-2026:36319 -
  • () https://access.redhat.com/errata/RHSA-2026:36625 -

02 Jul 2026, 12:17

Type Values Removed Values Added
References
  • () https://access.redhat.com/errata/RHSA-2026:34364 -

01 Jul 2026, 13:17

Type Values Removed Values Added
References
  • () https://access.redhat.com/errata/RHSA-2026:33574 -

30 Jun 2026, 03:19

Type Values Removed Values Added
References
  • () https://access.redhat.com/errata/RHSA-2026:33120 -
  • () https://access.redhat.com/errata/RHSA-2026:33123 -
  • () https://access.redhat.com/errata/RHSA-2026:33142 -
  • () https://access.redhat.com/errata/RHSA-2026:33150 -
  • () https://access.redhat.com/security/cve/CVE-2026-39820 -
  • () https://bugzilla.redhat.com/show_bug.cgi?id=2467820 -
  • () https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-39820.json -
CWE CWE-606

13 May 2026, 15:10

Type Values Removed Values Added
References () https://go.dev/cl/759940 - () https://go.dev/cl/759940 - Patch
References () https://go.dev/issue/78566 - () https://go.dev/issue/78566 - Issue Tracking
References () https://groups.google.com/g/golang-announce/c/qcCIEXso47M - () https://groups.google.com/g/golang-announce/c/qcCIEXso47M - Issue Tracking, Mailing List
References () https://pkg.go.dev/vuln/GO-2026-4986 - () https://pkg.go.dev/vuln/GO-2026-4986 - Vendor Advisory
First Time Golang
Golang go
CWE CWE-770
CPE cpe:2.3:a:golang:go:*:*:*:*:*:*:*:*

08 May 2026, 15:16

Type Values Removed Values Added
CVSS v2 : unknown
v3 : unknown
v2 : unknown
v3 : 7.5

07 May 2026, 20:16

Type Values Removed Values Added
New CVE

Information

Published : 2026-05-07 20:16

Updated : 2026-07-31 13:18


NVD link : CVE-2026-39820

Mitre link : CVE-2026-39820

CVE.ORG link : CVE-2026-39820


JSON object : View

Products Affected

golang

  • go
CWE
CWE-770

Allocation of Resources Without Limits or Throttling

CWE-606

Unchecked Input for Loop Condition