{"id":"GHSA-j443-wcqq-xprh","aliases":["GO-2026-4673"],"status":"published","title":"Terraform Provider for SendGrid: TLS Session Resumption Bypasses Certificate Authority Trust Store Modifications in Go","description":"### Summary\n\nA critical vulnerability has been identified at https://security.snyk.io/package/linux/chainguard:latest/terraform-provider-sendgrid, associated with the underlying Go version.\n\nIf the server's TLS configuration is mutated between connections — for example, a CA is removed from the trusted list via `Config.Clone()` combined with modification or `GetConfigForClient` — the resumed handshake still succeeds using the cached session. The certificate is not re-checked against the updated CA list.\n\nAs a result, a client whose CA was revoked or removed between the first and second connection could still establish a connection on the resumed session.\n\n### Details\n\nIf the server's TLS configuration is mutated between connections — for example, a CA is removed from the trusted list via `Config.Clone()` combined with modification or `GetConfigForClient` — the resumed handshake still succeeds using the cached session. The certificate is not re-checked against the updated CA list.\n\nConsequently, a client whose CA was revoked or removed between the first and second connection could still establish a connection on the resumed session.","severity":{"version":"3.1","score":10,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H","level":"critical","from":"ghsa"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-295"],"published":"2026-03-11T00:32:49Z","modified":"2026-03-23T04:56:29Z","affected":[{"source":"ghsa","ecosystem":"Go","package":"github.com/arslanbekov/terraform-provider-sendgrid","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"last_affected":"1.1.3-0.20250606002314-b4a2dfeb7b0f"}]}]},{"source":"osv","ecosystem":"Go","package":"github.com/arslanbekov/terraform-provider-sendgrid","ranges":[{"type":"SEMVER","events":[{"introduced":"0"},{"last_affected":"1.1.3-0.20250606002314-b4a2dfeb7b0f"}]}]},{"source":"osv","ecosystem":"Go","package":"github.com/arslanbekov/terraform-provider-sendgrid","ranges":[{"type":"SEMVER","events":[{"introduced":"0"}]}]}],"references":[{"url":"https://github.com/arslanbekov/terraform-provider-sendgrid/security/advisories/GHSA-j443-wcqq-xprh","tags":["web","advisory"]},{"url":"https://github.com/advisories/GHSA-h355-32pf-p2xm","tags":["advisory","web"]},{"url":"https://security.snyk.io/vuln/SNYK-CHAINGUARDLATEST-TERRAFORMPROVIDERSENDGRID-15265295","tags":["web"]},{"url":"https://github.com/advisories/GHSA-j443-wcqq-xprh"},{"url":"https://github.com/arslanbekov/terraform-provider-sendgrid","tags":["package"]}],"sources":{"ghsa":[{"id":"GHSA-j443-wcqq-xprh","title":"Terraform Provider for SendGrid: TLS Session Resumption Bypasses Certificate Authority Trust Store Modifications in Go","description":"### Summary\n\nA critical vulnerability has been identified at https://security.snyk.io/package/linux/chainguard:latest/terraform-provider-sendgrid, associated with the underlying Go version.\n\nIf the server's TLS configuration is mutated between connections — for example, a CA is removed from the trusted list via `Config.Clone()` combined with modification or `GetConfigForClient` — the resumed handshake still succeeds using the cached session. The certificate is not re-checked against the updated CA list.\n\nAs a result, a client whose CA was revoked or removed between the first and second connection could still establish a connection on the resumed session.\n\n### Details\n\nIf the server's TLS configuration is mutated between connections — for example, a CA is removed from the trusted list via `Config.Clone()` combined with modification or `GetConfigForClient` — the resumed handshake still succeeds using the cached session. The certificate is not re-checked against the updated CA list.\n\nConsequently, a client whose CA was revoked or removed between the first and second connection could still establish a connection on the resumed session.","status":"published","published":"2026-03-11T00:32:49Z","modified":"2026-03-11T00:32:51Z","cvss":[{"version":"3.1","score":10,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H","level":"critical"}],"cwes":["CWE-295"],"updated_at":"2026-11-02T14:39:34.616253Z"}],"osv":[{"id":"GHSA-j443-wcqq-xprh","title":"Terraform Provider for SendGrid: TLS Session Resumption Bypasses Certificate Authority Trust Store Modifications in Go","description":"### Summary\n\nA critical vulnerability has been identified at https://security.snyk.io/package/linux/chainguard:latest/terraform-provider-sendgrid, associated with the underlying Go version.\n\nIf the server's TLS configuration is mutated between connections — for example, a CA is removed from the trusted list via `Config.Clone()` combined with modification or `GetConfigForClient` — the resumed handshake still succeeds using the cached session. The certificate is not re-checked against the updated CA list.\n\nAs a result, a client whose CA was revoked or removed between the first and second connection could still establish a connection on the resumed session.\n\n### Details\n\nIf the server's TLS configuration is mutated between connections — for example, a CA is removed from the trusted list via `Config.Clone()` combined with modification or `GetConfigForClient` — the resumed handshake still succeeds using the cached session. The certificate is not re-checked against the updated CA list.\n\nConsequently, a client whose CA was revoked or removed between the first and second connection could still establish a connection on the resumed session.","status":"published","published":"2026-03-11T00:32:49Z","modified":"2026-03-23T04:56:29.135498709Z","cvss":[{"version":"3.1","score":10,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H","level":"critical"}],"cwes":["CWE-295"],"updated_at":"2026-11-02T15:46:49.977351Z"},{"id":"GO-2026-4673","title":"Terraform Provider for SendGrid: TLS Session Resumption Bypasses Certificate Authority Trust Store Modifications in Go in github.com/arslanbekov/terraform-provider-sendgrid","description":"Terraform Provider for SendGrid: TLS Session Resumption Bypasses Certificate Authority Trust Store Modifications in Go in github.com/arslanbekov/terraform-provider-sendgrid","status":"published","published":"2026-03-12T20:57:37Z","modified":"2026-03-23T04:52:53.080061Z","updated_at":"2026-11-02T15:47:02.280725Z"}]}}