GHSA-j443-wcqq-xprh Terraform Provider for SendGrid: TLS Session Resumption Bypasses Certificate Authority Trust Store Modifications in Go
Go TLS session resumption bypasses CA trust store updates, allowing revoked clients to reconnect if server config changes between connections.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is GHSA-j443-wcqq-xprh?
GHSA-j443-wcqq-xprh is a vulnerability in github.com/arslanbekov/terraform-provider-sendgrid, published on 11 Mar 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
Summary
A critical vulnerability has been identified at https://security.snyk.io/package/linux/chainguard:latest/terraform-provider-sendgrid, associated with the underlying Go version.
If 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.
As a result, a client whose CA was revoked or removed between the first and second connection could still establish a connection on the resumed session.
Details
If 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.
Consequently, a client whose CA was revoked or removed between the first and second connection could still establish a connection on the resumed session.
Which versions are affected by GHSA-j443-wcqq-xprh?
3 open source packages ship an affected version, including github.com/arslanbekov/terraform-provider-sendgrid.
| Package | Affected | Fixed in |
|---|---|---|
github.com/arslanbekov/terraform-provider-sendgrid Go | All versions | None |
github.com/arslanbekov/terraform-provider-sendgrid Go | All versions to 1.1.3-0.20250606002314-b4a2dfeb7b0f | None |
github.com/arslanbekov/terraform-provider-sendgrid Go | All versions to 1.1.3-0.20250606002314-b4a2dfeb7b0f | None |
How do I fix GHSA-j443-wcqq-xprh?
No fix has been published for GHSA-j443-wcqq-xprh yet. Limit exposure of the affected software until one is available.
Is GHSA-j443-wcqq-xprh being exploited?
There is no known exploitation of GHSA-j443-wcqq-xprh in the wild and no public exploit code.
Sources
Also known as GO-2026-4673.