[security] Go 1.21.1 and Go 1.20.8 are released

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Publishergroups.google.com

Article IDNo stable ID in source URL

Verified snapshot29 Sept 2026, 08:14 UTC

Linked CVEs5

Linked CVE reports

These are source relationships, not a claim that this article fixes every affected product or branch.

CVE-2023-39322Memory exhaustion in QUIC connection handling in crypto/tls
CVE-2023-39321Panic when processing post-handshake message on QUIC connections in crypto/tls
CVE-2023-39320Arbitrary code execution via go.mod toolchain directive in cmd/go
CVE-2023-39319Improper handling of special tags within script contexts in html/template
CVE-2023-39318Improper handling of HTML-like comments in script contexts in html/template

Source and provenance

Original title: [security] Go 1.21.1 and Go 1.20.8 are released. Captured 29 Sept 2026, 08:14 UTC. The stored article is used for enrichment and change detection; BlackTree does not republish the publisher's full text here.

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