--- id: CVE-2026-32283 title: >- If one side of the TLS connection sends multiple key update messages post-handshake in a single record, the connection can deadlock, causing uncontrolled consumption of resources summary: >- If one side of the TLS connection sends multiple key update messages post-handshake in a single record, the connection can deadlock, causing uncontrolled consumption of resources. This can lead to a denial of service. This only affects T… severity: high cvss: 7.5 cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H' cwe: - CWE-770 - CWE-764 - CWE-667 vendor: golang product: go affected: - go < 1.25.9 - 'go >= 1.26.0, < 1.26.2' patched: - go 1.26.2 published: '2026-04-08' updated: '2026-09-18' sourceUpdated: '2026-09-18T13:17:48.437' source: NVD sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-32283' references: - url: 'https://go.dev/cl/763767' label: security@golang.org - url: 'https://go.dev/issue/78334' label: security@golang.org - url: 'https://groups.google.com/g/golang-announce/c/0uYbvbPZRWU' label: security@golang.org - url: 'https://pkg.go.dev/vuln/GO-2026-4870' label: security@golang.org - url: 'https://access.redhat.com/errata/RHSA-2026:10217' label: 0b0ca135-0b70-47e7-9f44-1890c2a1c46c - url: 'https://access.redhat.com/errata/RHSA-2026:10219' label: 0b0ca135-0b70-47e7-9f44-1890c2a1c46c - url: 'https://access.redhat.com/errata/RHSA-2026:10704' label: 0b0ca135-0b70-47e7-9f44-1890c2a1c46c - 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url: 'https://access.redhat.com/errata/RHSA-2026:57802' label: 0b0ca135-0b70-47e7-9f44-1890c2a1c46c - url: 'https://access.redhat.com/errata/RHSA-2026:60520' label: 0b0ca135-0b70-47e7-9f44-1890c2a1c46c - url: 'https://access.redhat.com/errata/RHSA-2026:65126' label: 0b0ca135-0b70-47e7-9f44-1890c2a1c46c - url: 'https://access.redhat.com/errata/RHSA-2026:65343' label: 0b0ca135-0b70-47e7-9f44-1890c2a1c46c - url: 'https://access.redhat.com/errata/RHSA-2026:65514' label: 0b0ca135-0b70-47e7-9f44-1890c2a1c46c - url: 'https://access.redhat.com/errata/RHSA-2026:66022' label: 0b0ca135-0b70-47e7-9f44-1890c2a1c46c - url: 'https://access.redhat.com/errata/RHSA-2026:66084' label: 0b0ca135-0b70-47e7-9f44-1890c2a1c46c - url: 'https://access.redhat.com/errata/RHSA-2026:66401' label: 0b0ca135-0b70-47e7-9f44-1890c2a1c46c - url: 'https://access.redhat.com/errata/RHSA-2026:66523' label: 0b0ca135-0b70-47e7-9f44-1890c2a1c46c - url: 'https://access.redhat.com/errata/RHSA-2026:67319' label: 0b0ca135-0b70-47e7-9f44-1890c2a1c46c - url: 'https://access.redhat.com/errata/RHSA-2026:68504' label: 0b0ca135-0b70-47e7-9f44-1890c2a1c46c - url: 'https://access.redhat.com/errata/RHSA-2026:7291' label: 0b0ca135-0b70-47e7-9f44-1890c2a1c46c - url: 'https://access.redhat.com/errata/RHSA-2026:7385' label: 0b0ca135-0b70-47e7-9f44-1890c2a1c46c - url: 'https://access.redhat.com/security/cve/CVE-2026-32283' label: 0b0ca135-0b70-47e7-9f44-1890c2a1c46c - url: 'https://bugzilla.redhat.com/show_bug.cgi?id=2456338' label: 0b0ca135-0b70-47e7-9f44-1890c2a1c46c - url: >- https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-32283.json label: 0b0ca135-0b70-47e7-9f44-1890c2a1c46c tags: - nvd - cve.org - osv - go epss: 0.00621 epssPercentile: 0.48456 aliases: - GO-2026-4870 - BIT-golang-2026-32283 ecosystem: go ssvc: exploitation: none automatable: 'yes' technicalImpact: partial timestamp: '2026-04-13T17:51:46.207289Z' ingestedAt: '2026-07-01T15:50:58.765Z' --- ## Overview If one side of the TLS connection sends multiple key update messages post-handshake in a single record, the connection can deadlock, causing uncontrolled consumption of resources. This can lead to a denial of service. This only affects TLS 1.3. ## Affected - `go < 1.25.9` - `go >= 1.26.0, < 1.26.2` ## Remediation Upgrade past the affected range: - `go 1.26.2` ## Package advisory (CVE-2026-32283) Affected packages: - `stdlib >= 1.26.0-0, < 1.26.2` Patched in: - `stdlib 1.26.2` Source: https://osv.dev/vulnerability/GO-2026-4870