CVE-2026-113799 Slack Morphism verifier errors disclose valid HMACs in the logs

Slack Morphism is a client library for Slack Web/Events API/Socket Mode and Block Kit. Versions 1.0.0 through 2.27.0 expose the correct Slack request HMAC when signature verification fails. For an invalid request, slack-morphism computes the correct signature for the attacker-controlled timestamp...

CVE-2026-113799

The Slack Morphism client library (versions 1.0.0 through 2.27.0 ) contains a vulnerability where signature verification failures disclose valid HMACs in application logs. Specifically, the slack-morphism library computes the correct signature for an attacker-controlled request body and stores it...