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cert-manager

v1.20.5Security
Oct 28, 2026

ACTION 9

A security maintenance release that removes trust in compromised certificate authorities and updates vulnerable Go and OpenTelemetry dependencies. Source builds now require Go 1.26, including Go 1.26.10 for fixes across standard-library packages.

Action needed (9)

  • securitycriticalgolang.org/x/net HTTP/2 fixes

    golang.org/x/net is updated to v0.60.0 to fix CVE-2026-78669, CVE-2026-78659, CVE-2026-78660, CVE-2026-78663, and CVE-2026-97032 in HTTP/2.

    CVE-2026-78669CVE-2026-78659CVE-2026-78660

  • securityhighgithub.com/go-jose/go-jose/v4 updated to v4.1.6

    github.com/go-jose/go-jose/v4 is updated to v4.1.6 to fix CVE-2026-116587 and GHSA-mgcc-cww5-fp2q, a denial of service when parsing JWKs containing RSA keys.

    CVE-2026-116587

  • securityhighgolang.org/x/crypto updated to v0.57.0

    golang.org/x/crypto is updated to v0.57.0 to fix CVE-2026-56855 and CVE-2026-78662.

    CVE-2026-56855CVE-2026-78662

  • securitycrypto/x509 certificate-chain rejection

    crypto/x509 now rejects certificate chains that pass through compromised intermediates. This behavior ships with Go 1.26.10 and addresses CVE-2026-111943 and GO-2026-6809.

    CVE-2026-111943

  • securityTrust in compromised certificate authority roots removed

    The base images now use Debian 13, which no longer trusts the compromised emSign ECC Root CA - G3 and AAA Certificate Services roots.

  • securityGo 1.26.10 security update

    Go is updated to 1.26.10, which fixes issues in the crypto/tls, crypto/x509, net/http, net/textproto, mime/multipart, and html/template packages.

  • securityOpenTelemetry OTLP trace exporters updated to v1.45.0

    go.opentelemetry.io/otel/exporters/otlp/otlptrace and otlptracegrpc are updated to v1.45.0 to fix a reported security vulnerability.

  • securitygolang.org/x/net html package fixes

    golang.org/x/net is updated to v0.62.0 to fix CVE-2026-78661 and CVE-2026-97045 in the html package.

    CVE-2026-78661CVE-2026-97045

  • breakingThe go directive, raised to 1.26

    The go directive in cert-manager's go.mod files is now 1.26. Source builds use the Go 1.26 toolchain requirement.

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