CVE-2026-39820

HIGH

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

CVSS v3.1 Score

7.5
HIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Attack Vector
NETWORK
Complexity
LOW
Privileges
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
NONE
Integrity
NONE
Availability
HIGH
Published: 5/7/2026Modified: 10/26/2026

Related Intelligence (2)

CRITICALAi

Patch Tuesday - May 2026

Microsoft is publishing 137 vulnerabilities on May 2026 Patch Tuesday . Microsoft is not aware of exploitation in the wild or public disclosure for any of these vulnerabilities. So far this month, Microsoft has provided patches to address 133 browser vulnerabilities, which are not included in the Patch Tuesday count above. Windows Netlogon: critical RCE Anyone responsible for securing a domain con

CVE-2026-41089CVE-2020-1472
Rapid7
HIGHVulnerability

NVD HIGH: CVE-2026-39820 — Well-crafted inputs reaching ParseAddress, ParseAddressList, and ParseDate were ...

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

CVE-2026-39820
NIST NVD

References (97)

https://go.dev/cl/759940Patchhttps://go.dev/issue/78566Issue Trackinghttps://groups.google.com/g/golang-announce/c/qcCIEXso47MIssue TrackingMailing Listhttps://pkg.go.dev/vuln/GO-2026-4986Vendor Advisoryhttps://access.redhat.com/errata/RHSA-2026:22112https://access.redhat.com/errata/RHSA-2026:22120https://access.redhat.com/errata/RHSA-2026:22121https://access.redhat.com/errata/RHSA-2026:23262https://access.redhat.com/errata/RHSA-2026:23264https://access.redhat.com/errata/RHSA-2026:33120https://access.redhat.com/errata/RHSA-2026:33123https://access.redhat.com/errata/RHSA-2026:33142https://access.redhat.com/errata/RHSA-2026:33150https://access.redhat.com/errata/RHSA-2026:33574https://access.redhat.com/errata/RHSA-2026:34364https://access.redhat.com/errata/RHSA-2026:36319https://access.redhat.com/errata/RHSA-2026:36625https://access.redhat.com/errata/RHSA-2026:36754https://access.redhat.com/errata/RHSA-2026:36797https://access.redhat.com/errata/RHSA-2026:40262https://access.redhat.com/errata/RHSA-2026:41031https://access.redhat.com/errata/RHSA-2026:41066https://access.redhat.com/errata/RHSA-2026:41928https://access.redhat.com/errata/RHSA-2026:42146https://access.redhat.com/errata/RHSA-2026:42644https://access.redhat.com/errata/RHSA-2026:42796https://access.redhat.com/errata/RHSA-2026:43038https://access.redhat.com/errata/RHSA-2026:43052https://access.redhat.com/errata/RHSA-2026:43692https://access.redhat.com/errata/RHSA-2026:47952https://access.redhat.com/errata/RHSA-2026:49702https://access.redhat.com/errata/RHSA-2026:49712https://access.redhat.com/errata/RHSA-2026:50205https://access.redhat.com/errata/RHSA-2026:50300https://access.redhat.com/errata/RHSA-2026:50319https://access.redhat.com/errata/RHSA-2026:50336https://access.redhat.com/errata/RHSA-2026:50843https://access.redhat.com/errata/RHSA-2026:51033https://access.redhat.com/errata/RHSA-2026:51112https://access.redhat.com/errata/RHSA-2026:54274https://access.redhat.com/errata/RHSA-2026:54283https://access.redhat.com/errata/RHSA-2026:54284https://access.redhat.com/errata/RHSA-2026:54285https://access.redhat.com/errata/RHSA-2026:54286https://access.redhat.com/errata/RHSA-2026:54287https://access.redhat.com/errata/RHSA-2026:54531https://access.redhat.com/errata/RHSA-2026:54552https://access.redhat.com/errata/RHSA-2026:54555https://access.redhat.com/errata/RHSA-2026:54583https://access.redhat.com/errata/RHSA-2026:54602https://access.redhat.com/errata/RHSA-2026:54883https://access.redhat.com/errata/RHSA-2026:56340https://access.redhat.com/errata/RHSA-2026:56789https://access.redhat.com/errata/RHSA-2026:56852https://access.redhat.com/errata/RHSA-2026:56854https://access.redhat.com/errata/RHSA-2026:57194https://access.redhat.com/errata/RHSA-2026:57401https://access.redhat.com/errata/RHSA-2026:57482https://access.redhat.com/errata/RHSA-2026:57487https://access.redhat.com/errata/RHSA-2026:57649https://access.redhat.com/errata/RHSA-2026:57845https://access.redhat.com/errata/RHSA-2026:57914https://access.redhat.com/errata/RHSA-2026:59467https://access.redhat.com/errata/RHSA-2026:59830https://access.redhat.com/errata/RHSA-2026:59833https://access.redhat.com/errata/RHSA-2026:60018https://access.redhat.com/errata/RHSA-2026:60023https://access.redhat.com/errata/RHSA-2026:60520https://access.redhat.com/errata/RHSA-2026:61253https://access.redhat.com/errata/RHSA-2026:62260https://access.redhat.com/errata/RHSA-2026:62406https://access.redhat.com/errata/RHSA-2026:62407https://access.redhat.com/errata/RHSA-2026:62753https://access.redhat.com/errata/RHSA-2026:62754https://access.redhat.com/errata/RHSA-2026:62803https://access.redhat.com/errata/RHSA-2026:63022https://access.redhat.com/errata/RHSA-2026:65116https://access.redhat.com/errata/RHSA-2026:65117https://access.redhat.com/errata/RHSA-2026:65153https://access.redhat.com/errata/RHSA-2026:65335https://access.redhat.com/errata/RHSA-2026:65336https://access.redhat.com/errata/RHSA-2026:65534https://access.redhat.com/errata/RHSA-2026:65838https://access.redhat.com/errata/RHSA-2026:65886https://access.redhat.com/errata/RHSA-2026:65895https://access.redhat.com/errata/RHSA-2026:66016https://access.redhat.com/errata/RHSA-2026:66022https://access.redhat.com/errata/RHSA-2026:66327https://access.redhat.com/errata/RHSA-2026:67517https://access.redhat.com/errata/RHSA-2026:67974https://access.redhat.com/errata/RHSA-2026:67975https://access.redhat.com/errata/RHSA-2026:68334https://access.redhat.com/errata/RHSA-2026:68504https://access.redhat.com/errata/RHSA-2026:68527https://access.redhat.com/security/cve/CVE-2026-39820https://bugzilla.redhat.com/show_bug.cgi?id=2467820https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-39820.json